VICOR PRM48AH480 200A00 Series User manual

Features
•48.0 V input (36.0 V to 75.0 V),
non-isolated ZVS buck-boost regulator
•20.0 V to 55.0 V adjustable output range
•200 W output power in 0.57 in2footprint
•96.7% typical efficiency, at full load
•1341 W/in3(82 W/cm3) Power Density
•5.29 MHrs MTBF (MIL-HDBK-217 Plus Parts Count)
•Pin selectable operating mode
Adaptive Loop
Remote Sense / Child Operation
•Half VI Chip®Package
22.0mm x 16.5mm x 6.73mm
Typical Applications
•High Density Power Supply DC-DC rail outputs
•High Density ATE system DC-DC power
•Telecom NPU and ASIC core power
•Communications Systems
•Non-isolated and isolated power converters
Product Description
The VI Chip® PRMTM Regulator is high efficiency converter,
operating from a 36.0 to 75.0 Vdc input to generate a regulated
20.0 to 55.0 Vdc output. The ZVS buck-boost topology enables
high switching frequency (~1.03 MHz) operation with high
conversion efficiency. High switching frequency reduces the
size of reactive components enabling power density up to
1341 W/in3.
The Half VI Chip® package is compatible with standard pick-
and-place and surface mount assembly processes with a planar
thermal interface area and superior thermal conductivity.
In a Factorized Power Architecture™ system, the PRM and
downstream VTMTM current multiplier minimize distribution
and conversion losses in a high power solution, providing an
isolated, regulated output voltage.
The PRM48AH480x200A00 has two selectable modes of
regulation depending on the application requirements.
In Adaptive Loop Operation, the PRM48AH480x200A00 utilizes
a unique feed-forward scheme that enables precise regulation
of an isolated POL voltage without the need for remote sensing
and voltage feedback.
In Remote Sense Operation, the internal regulation circuitry is
disabled, and an external control loop and current sensor
maintain regulation. This a ords flexibility in the design of both
voltage and current compensation loops to optimize
performance in the end application.
High Efficiency Converter
S
NRTL
C US
PRMTM Regulator
PRM48AH480x200A00
Product Ratings
VIN = 36.0 V to 75.0 V POUT = 200 W
VOUT = 48.0 V IOUT = 4.17 A
(20.0 V to 55.0 V Trim)
Rev 1.6
PRM™ Regulator
Page 1 of 42 09/2020

PRM48AH480x200A00
PRM
ENABLE
TRIM
SHARE/
CONTROL NODE
AL
IFB
VC
VT
VAUX
REF/
REF_EN
+IN
–IN
+OUT
–OUT
TM
VC
PC
VOUT
+IN
–IN –OUT
+OUT
Adaptive Loop Temperature Feedback
VTM Start Up Pulse
SGND
SGND
GND
SGND
R
TRIM
ON/OFF
CONTROL
SGND
VF: 20 V to 55 V
ISOLATION BOUNDRY
SEC_GND
VTM
PRIMARY SECONDARY
CIN CF
COUT
Vin
LF
R
AL
External Current Sense
GND
SGND
ON/OFF
CONTROL
SGND
SGND
GND
Voltage Reference with Soft Start
Voltage Sense and Error Amplifier
(Differential)
VTM Start up Pulse
SGND
IN OUT
GND
V
REF
V +
VOUT
–IN+IN
V –
PRM
ENABLE
TRIM
SHARE/
CONTROL NODE
AL
IFB
VC
VT
VAUX
REF/
REF_EN
+IN
–IN
+OUT
–OUT
SGND
SGND
TM
VC
PC
+IN
–IN –OUT
+OUT
ISOLATION BOUNDRY
VTM
PRIMARY SECONDARY
CIN CF
COUT
REF 3312
[1] [1]
VIN
LF
SGND
Voltage Sense
SGND
LOAD
Typical Applications
[1] Non-Isolated Configuration: –Out connected to -IN
Typical Application: PRM48AH480x200A00 + VTM, non-isolated Remote Sense Configuration
Typical Application: PRM48AH480x200A00 + VTM Adaptive Loop Configuration
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Half VIC
1234
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
SHARE/
CONTROL NODE ENABLE
TRIM
NC
NC
AL
VT
VAUX
IFB
SGND
REF/REF_EN
VC
+IN
-IN
+OUT
-OUT
TOP VIEW
Pin
Number Signal Name Type Function
A1
SHAR
(Adaptive Loop / Child Operation) BIDIR Parallel sharing control bus for parent-child configuration.
CONTROL NOD Modulator control node input. Driven by external error amplifier in Remote Sense
(Remote Sense Operation) INPUT Operation.
A3 VT INPUT VTM TM input for temperature compensation. Leave disconnected for Remote Sense
(Adaptive Loop Operation) Operation.
B2 NABL BIDIR nables power supply when allowed to float high. 5 V during normal operation.
B4 VAUX OUTPUT 9 V auxiliary bias voltage.
C1 TRIM INPUT Selects operating mode. Adjusts output voltage in Adaptive Loop Operation.
C3 IFB INPUT Current sense input for current limit and overcurrent protection in Remote Sense Operation.
(Remote Sense Operation) Leave disconnected for Adaptive Loop Operation.
D2 NC n/a Do not connect this pin.
D4 SGND INPUT Signal ground, reference for analog controls. Kelvin connected internally to –IN and –OUT.
1 NC n/a Do not connect this pin.
R F
3 (Adaptive Loop Operation) OUTPUT Reference voltage for internal error amplifier in Adaptive Loop Operation.
R F_ N
(Remote Sense Operation) OUTPUT Powers and enables external control circuit voltage reference in Remote Sense Operation.
F2 AL INPUT Adaptive loop gain control. Sets the magnitude of the Adaptive Loop load line in Adaptive
(Adaptive Loop Operation) Loop Operation. Leave disconnected for Remote Sense Operation.
F4 VC OUTPUT Bias voltage to power VTM module during start up
G1,G2 +IN INPUT Positive input power terminal
POW R
G3,G4 +OUT OUTPUT Positive output power terminal
POW R
H1,H2 -IN INPUT Negative input power terminal. Connected internally to -OUT.
POW R R TURN
H3,H4 -OUT OUTPUT Negative output power terminal. Connected internally to -IN.
POW R R TURN
Pin Configuration
Pin Descriptions
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Device Input Voltage
Range Package Type Output Voltage x 10 Temperature Grade Output Power Revision Version
PRM 48A H 480 T 200 A 00
PRM = PRM 48A = 36.0 V - 75.0 V H = Half VIC 480 = 48.0 V T = -40 to 125°C 200 = 200 WA 00 = AL / RS
SMD M = -55 to 125°C
Part Ordering Information
Part Number VIN Package Type VOUT Temperature Power Version
PRM48AH480T200A00 36.0 V - 75.0 V Half VIC 48.0 V -40 to 125°C 200 W AL / RS
PRM48AH480M200A00 SMD (20.0 V to 55.0 V) -55 to 125°C (Pin Selectable)
Standard Models
Parameter Comments Min Max Unit
SHAR / CONTROL NOD -0.3 10.5 V
+/-10 mA
NABL -0.3 5.5 V
+/-10 mA
+IN to –IN Continuous, non-operating -1 90 V
100 ms, non-Operating 100 V
VAUX -0.5 10.5 V
+/-100 mA
SGND +/-100 mA
IFB -0.5 5.7 V
-0.3 3.6 V
R F / R F _ N Remote Sense Operation (R F _ N) 10 mA
Adaptive Loop Operation (R F) 3.4 mA
TRIM -0.3 3.6 V
AL -0.3 3.6 V
VT -0.3 4.8 V
VC to –OUT -0.5 18 V
+/-1.8 A
+OUT to –OUT -1 62 V
Output Current 6.3 A
Internal Operating T Grade -40 125 °C
Temperature M Grade -55 125 °C
Storage T Grade -40 125 °C
Temperature M Grade -65 125 °C
Absolute Maximum Ratings
The ABSOLUT MAXIMUM ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to device.
lectrical specifications do not apply when operating beyond rated operating conditions. Operating beyond rated operating conditions for extended period of
time may affect device reliability. All voltages are specified relative to SGND unless otherwise noted. Positive pin current represents current flowing
out of the pin.
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Electrical Specifications
Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the
temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.
Attribute Symbol Conditions / Notes Min Typ Max Unit
Power Input Specification
Input Voltage Range VIN Continuous, operating 36.0 48.0 75.0 V
VIN Slew Rate dVIN /dt 0 ≤VIN ≤75.0 V 0.001 1000 V/ms
Initialization Voltage VINIT Internal micro controller initialization voltage 10 V
Initialization Delay tINIT From VIN first crossing VINIT 5.0 7.0 9.0 ms
No Load Power Dissipation PNL NABL HIGH, VIN = 48.0 V 2.4 3.5 W
Input Quiescent Current IQC NABL LOW, VIN = 48.0 V 14.5 20.0 mA
Input Current IIN_DC IOUT = 4.17 A, VIN = 48.0 V, VOUT = 48.0 V 4.3 4.4 A
Input Capacitance (Internal) CIN_INT ffective value, VIN = 48.0 V (see Fig. 13)2µF
Input Capacitance (Internal) SR RCIN ffective value, VIN = 48.0 V 3.0 mΩ
Power Output Specification
Rated Output Current IOUT Standalone and Parent Operation, see Figure 1, SOA 4.17 A
Rated Output Power POUT Standalone and Parent Operation, see Figure 1, SOA 200 W
VIN = 48.0 V VOUT = 48.0 V,
Switching Frequency FSW
IOUT = 2.08 A, TINT = 25°C 0.94 1.03 1.07 MHz
Over line, load, trim and temperature, 0.70 1.07 MHz
exclusive of burst mode
From VIN first crossing VIN_UVLO+_SUPV 20 µs
Output Turn-ON Delay tON to NABL high; tINIT expired
From NABL pin release to NABL high, VIN applied, tOFF expired 20 µs
Start up Sequence Timeout tSTARTUP_S Q From NABL high to start up sequence complete 17 ms
VIN = 48.0 V, VOUT = 48.0 V, IOUT = 4.17 A, TINT = 25°C 95.25 %
VIN = 48.0 V, VOUT = 48.0 V, IOUT = 2.08 A, TINT = 25°C 94.095.0 %
fficiency Ambient ηAMB VIN = 36.0 V to 75.0 V, 93.25 %
VOUT = 48.0 V, IOUT = 4.17 A, TINT = 25°C
VIN = 36.0 V to 75.0 V,
IOUT = 4.17 A, TINT = 25°C, over trim 90.0 %
VIN = 48.0 V, VOUT = 48.0 V,
IOUT = 4.17 A, TINT = 100°C 94.8 96.8 %
VIN = 48.0 V, VOUT = 48.0 V,
IOUT = 2.08 A, TINT = 100°C 94.0 96.0 %
fficiency Hot ηHOT VIN = 36.0 V to 75.0 V , VOUT = 48.0 V,
IOUT = 4.17 A, TINT = 100°C 93.5 %
VIN = 36.0 V to 75.0 V , IOUT = 4.17 A,
TINT = 100°C, over trim 90.0 %
fficiency Over Temperature η>50% load and VOUT = 48.0 V; over temperature 94.0 %
>50% load; over temperature and trim 87.0 %
Output Discharge current IOD Average Value 0.5 mA
Output Voltage Ripple VOUT_PP
VIN = 48.0 V, VOUT = 48.0 V,
IOUT = 4.17 A, COUT_ XT = 0 F, 20 MHz BW 1000 1500 mV
Output Inductance (Parasitic) LOUT_PAR Frequency @ 1.03 MHz, Simulated J-Lead model 2.5 nH
Output Capacitance (Internal) COUT_INT ffective value, VOUT = 48.0 V (see Fig.13)2µF
Output Capacitance (Internal) SR RCOUT ffective value, VOUT = 48.0 V 3.0 mΩ
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Electrical Specifications (cont.)
Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the
temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.
Attribute Symbol Conditions / Notes Min Typ Max Unit
Power Output Specifications: Adaptive Loop Operation
Output Voltage Setpoint VOUT_S T No load, trim Inactive, Adaptive Loop load line inactive 47.00 48.00 49.00 V
Output Voltage Trim Range VOUT 20.0 55.0 V
Output Voltage Rise Time tRIS _VOUT From soft start initiated to output voltage settled 1.7 1.8 1.9 ms
Output Voltage Load Regulation VOUT_R G_LOAD Adaptive loop load line inactive 0.02 0.2 %
Output Voltage Line Regulation VOUT_R G_LIN Adaptive loop load line inactive 0.02 0.2 %
Total Regulation rror VOUT_R G_TOTAL PRM output voltage, Adaptive Loop load line inactive 0.2 %
VTM output voltage, total Adaptive Loop regulation, 13%
Total AL Regulation rror VOUT_R G_AL
VOUT = 48.0 V, trim inactive
VTM output voltage, total Adaptive Loop regulation, 5%
trim active, exclusive of external resistor tolerances
VIN = 48.0 V, VOUT = 48.0 V, TINT = 25°C, constant 4.6 5.2 5.8 A
Output Current Limit ILIMIT current limit after supervisory limit detection time tLIM_SUPV
Over line, load, trim and temperature 4.2 6.3 A
Load Capacitance ( lectrolytic) CLOAD_AL L
0.1 Ω≤SR ≤1Ω, See Figure 32,
total capacitance (CLOAD_AL L + CLOAD_C R) ≤47 µF 47 µF
Load Capacitance (Ceramic) CLOAD_C R 2mΩ≤SR ≤200 mΩ, See Figure 32 25 µF
Load Transient Voltage Deviation VTRANS
10% ↔100% load step, 10 A/µsec, 0 µF COUT ,4.8 V
deviation from initial setpoint
10% ↔100% load step, 10 A/µsec, 0 µF COUT ,
Recovery to 90% of final value, Adaptive Loop 100 µs
Load Transient Recovery Time tTRANS
load line inactive
10% ↔100% load step, 10 A/µsec, 0 µF COUT ,
Recovery to 90% of final value, 500 µs
Adaptive Loop load line active, VAL = 1.20 V
Power Output Specifications: Child Operation with AL Parent
3.3 A
Rated Current Within an Array IOUT_ARRAY
Child Operation within an array, up to 5°C case
temperature differential, parent-child configuration
2.9 A
Child Operation within an array, up to 30°C case
temperature differential, parent-child configuration
160 W
Rated Power Within an Array POUT_ARRAY
Child Operation within an array, up to 5°C case
temperature differential, parent-child configuration
140 W
Child Operation within an array, up to 30°C case
temperature differential, parent-child configuration
qual input, and output voltage at full load; 15 %
VIN = 48.0 V, VOUT = 48.0 V
qual input and output voltage at full load;
IOUT_SHAR _MS
Over line and trim, with 25°C ≤TC≤100°C and ≤5°C 15 %Current Sharing Difference
(Parent to Child) part-part temp. mismatch
qual input, and output voltage at full load;
Over line and trim, with 25°C ≤TC≤100°C 20 %
and ≤30°C part-part temp. mismatch
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Electrical Specifications (cont.)
Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the
temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.
Attribute Symbol Conditions / Notes Min Typ Max Unit
Power Output Specifications: Child Operations (cont.)
qual input, output, and SHAR voltage at full load;
VIN = 48.0 V, VOUT = 48.0 V 5%
qual input, output and SHAR voltage at full load;
IOUT_SHAR _SS
Over line and trim, with 25°C ≤TC≤100°C 10 %
Current Sharing
Difference (Child to Child)and ≤5°C part-part temp. mismatch
qual input, output, and SHAR voltage at full load;
Over line and trim, with 25°C ≤TC≤100°C 15 %
and ≤30°C part-part temp. mismatch
Maximum Array Size NPRMS_PARALL L 5PRMs
Maximum number of parallel devices,
parent-child configuration
Power Output Specifications: Remote Sense Operation
Output Voltage Range VOUT 20.0 55.0 V
Remote Sense Operation within an array, 3.8 A
Rated Current Within an Array IOUT_ARRAY
up to 5°C case temperature differential
Remote Sense Operation within an array, 3.3 A
up to 30°C case temperature differential
Remote Sense Operation within an array, 180 W
Rated Power Within an Array POUT_ARRAY
up to 5°C case temperature differential
Remote Sense Operation within an array, 160 W
up to 30°C case temperature differential
qual input, output, and CONTROL NOD voltage 5%
at full load; VIN = 48.0 V, VOUT = 48.0 V
qual input, output and CONTROL NOD voltage at
full load; Over line and trim, with 25°C ≤TC≤100°C 10 %
Current Sharing Difference IOUT_SHAR _RS and ≤5°C part-part temp. mismatch
qual input, output, and CONTROL NOD voltage at
full load; Over line and trim, 15 %
with 25°C ≤TC ≤100°C and ≤30°C
part-part temp. mismatch (worst case)
Maximum Array Size NPRMS_PARALL L
Maximum number of parallel devices, Remote Sense 10 PRMs
configuration, CONTROL NOD externally driven
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Electrical Specifications (cont.)
Specifications apply over all line and load conditions, and trim from 20.0 V to 55.0 V, unless otherwise noted; Boldface specifications apply over the
temperature range of -40ºC < TINT < 125ºC; All Other specifications are at TINT = 25ºC unless otherwise noted.
Attribute Symbol Conditions / Notes Min Typ Max Unit
Powertrain Protections
Input Undervoltage Turn-ON VIN_UVLO+ 30.9 33.0 V
Input Undervoltage Turn-OFF VIN_UVLO- Instantaneous powertrain shutdown, detected after tBLANK 26.0 28.8 V
Input Undervoltage Hysteresis VUVLO_HYST (VIN_UVLO+) - (VIN_UVLO-)1.9 2.2 2.4 V
Input Overvoltage Turn-ON VIN_OVLO- 79.6 82.9 V
Input Overvoltage Turn-OFF VIN_OVLO+ Instantaneous powertrain shutdown, detected after tBLANK 84.6 88.8 V
Input Overvoltage Hysteresis VOVLO_HYST (VIN_OVLO+) - (VIN_OVLO-)1.4 1.7 2.1 V
Output Overvoltage Threshold VOUT_OVP+ Instantaneous shutdown, detected after tPROT 56.0 58.3 60.1 V
Minimum Current Limited Vout VOUT_UVP 12 V
Overtemperature Shutdown Setpoint TINT_OTP Instantaneous shutdown, detected after tPROT 125 ºC
Output Power Limit PPROT 200 W
Short Circuit VOUT Threshold VSC_VOUT 8.8 V
Short Circuit VOUT Recovery Threshold VSC_VOUTR 9.5 V
Short Circuit CONTROL NOD Threshold VSC_VCN 7.2 V
Short Circuit CONTROL NOD VSC_VCNR 6.9 V
Recovery Threshold
Short Circuit Timeout tSC
Short circuit fault detected after VSC_VOUT
and VSC_VCN thresholds persist for this time 5 ms
Short Circuit Recovery Time tSCR xcludes tOFF 75 ms
Overcurrent (IFB) and tBLANK 50 120 150 µs
Input Over/Undervoltage Blanking Time
Overtemperature, Output Overvoltage
and NABL Shutdown Response Time tPROT 2 µs
(Hardware)
Powertrain Supervisory Limits
Input Undervoltage Turn-ON VIN_UVLO+_SUPV 33.8 35.2 V
(Supervisory)
Input Undervoltage Turn-OFF VIN_UVLO-_SUPV Powertrain shutdown, detected after tLIM_SUPV 30.5 31.8 V
(Supervisory)
Input Undervoltage Hysteresis VUVLO_HYST_SUPV (VIN_UVLO+_SUPV) - (VIN_UVLO-_SUPV)1.6 2.0 2.1 V
(Supervisory)
Input Overvoltage Turn-ON VIN_OVLO-_SUPV 75.6 78.8 V
(Supervisory)
Input Overvoltage Turn-OFF VIN_OVLO+_SUPV Powertrain shutdown, detected after tLIM_SUPV 80.3 82.7 V
(Supervisory)
Input Overvoltage Hysteresis VOVLO_HYST_SUPV (VIN_UVLO+_SUPV) - (VIN_UVLO-_SUPV)1.2 1.5 1.8 V
(Supervisory)
Undertemperature Shutdown Setpoint TINT_UTP T Grade -40 ºC
(Supervisory) M Grade -55 ºC
Supervisory Limit Response Time tLIM_SUPV 150 µs
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
ENABLE
• The NABL pin enables and disables the PRM
• In PRM array configurations, NABL pins should be connected in order to synchronize start up
• NABL is 5 V with 1.8 mA source capability during normal operation
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Normal NABL Voltage V NABL 4.7 5.0 5.3 V
Analog Output Operation NABL Current I NABL _OP 1.8 mA
Start up NABL Source Current I NABL _ N After tOFF 90 µA
Minimum Time to Start tOFF 13.0 15.0 17.0 ms
Start up NABL VNABL _ N 2.5 3.2 V
nable Threshold
NABL VNABL _DIS 0.97 2.40 V
Digital Input / Output
Standby Disable Threshold
NABL RNABL _ XT Resistance to SGND required 235 Ω
Resistance ( xternal) to disable the PRM
Digital Output Fault NABL INABL _FAULT NABL voltage 1 V or above 4mA
Sink Current to SGND
Signal Specifications
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
VAUX: Auxillary Voltage Source
• Intended to power auxiliary circuits
• 9 V during normal operation with 5 mA source capability
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
VAUX Voltage VVAUX 8.6 9.0 9.5 V
Normal VAUX Current IVAUX 5mA
Operation IOUT = 0A, CVAUX_ XT = 0. Maximum
VAUX Voltage Ripple VVAUX_PP specification includes powertrain 100 400 mV
Analog Output operation in burst mode.
VAUX Capacitance CVAUX_ XT 0.04 µF
Transition ( xternal)
VAUX Fault Response tFR_VAUX From fault recognition to 30 µs
Time VAUX = 1.5 V
VC: VTM Control
• Pulsed voltage source used to power and synchronize downstream VTM during start up
• 14 V, 10 ms typical voltage pulse
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
VC Voltage VVC_START
Connected to VTM VC or equivalent, 13 14 18 V
IVC = 115 mA, CVC = 3.2 uF
Analog Output Start up VC Available Current IVC_START VC= 14 V, VIN > 20 V 200 mA
VC Duration tVC 710 16 ms
VC Slew Rate dVC/dt Connected to VTM or equivalent,
IVC = 115 mA, CVC = 3.2 uF 0.02 0.25 V/µs
NABL to VC Delay t NABL -VC 20 µs
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
SGND: Signal Ground
• All control signals must be referenced to this pin, with the exception of VC
• SGND is internally connected to -IN and -OUT
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Analog Input / Output Any Maximum Allowable ISGND -100 100 mA
Current
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
TRIM
• TRIM is used to select operating mode and trim the output voltage in Adaptive Loop Operation
• Internal pullup to VCC_INT through 10 kΩ resistor
•When pulled below 0.45 V during power up, Remote Sense / Child Operation is selected
• When allowed to pull up above 0.55 V during power up, Adaptive Loop Operation is selected
• Operating mode is detected during power up and cannot be changed unless input power is cycled
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Internally Generated VCC_INT 3.20 3.28 3.36 V
Normal VCC
Operation Internal Pullup RTRIM_INT 0.5% tolerance resistor 9.83 10.00 10.18 kΩ
Resistance to VCC_INT
Analog Input Mode Detection tMOD _D T CT From NABL high to mode detected, 100 140 200 µs
Delay after VIN first applied
Mode Remote Sense
Detect nable Threshold VRS_MOD _ N 0.45 V
Pull below this value during first
start up after application of power
to enable Remote Sense / Child
Operation
Remote Sense Pull above this value during first
Disable Threshold VRS_MOD _DIS start up after application of power to 0.55 V
enable Adaptive Loop Operation
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
TRIM (Adaptive Loop Operation Only)
• Provides dynamic trim control over the PRM output voltage in Adaptive Loop Operation
• Sampled prior to every start up to detect if trim is active or inactive
• Output voltage is equal to 20 times the voltage at the TRIM pin when applied TRIM voltage is within the active range
• Trim state is detected during normal operation and cannot be changed until start up is initiated
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Trim nable Threshold VTRIM_ N
Pull below this value during 3.10 V
start up to enable trim control
Trim Disable Threshold VTRIM_DIS
Pull above this value during
start up to disable trim control 3.20 V
Start up Minimum Trim Disable RTRIM_DIS_MIN Minimum TRIM resistance required 10 MΩ
Resistance to disable trim
Trim Capacitance CTRIM_ XT 100 pF
( xternal)
Trim Sample Delay t NABL _TRIM From NABL high to TRIM sampled 100 140 200 µs
Analog Input TRIM Pin VTRIM_RANG See Figure 26 1.00 2.75 V
Analog Range
TRIM Gain GTRIM
VOUT / VTRIM, 20 V / V
VTRIM applied within active range
Normal
Trim Accuracy %ACC_TRIM
Vout accuracy, exclusive of
Operation external resistor tolerance 0.5 2.0 %
VOUT Referred VOUT_R S 200 mV
Trim Resolution
Trim Latency tTRIM_LAT 60 120 240 µs
Trim Bandwidth BW TRIM -3dB point 1.2 kHz
Rev 1.6
PRM™ Regulator
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PRM48AH480x200A00
AL: Adaptive Loop (Adaptive Loop Operation Only)
• Provides Adaptive Loop load line programming in Adaptive Loop Operation
• Internal pullup to VCC_INT through 10 kΩresistor
• Sampled prior to every start up to detect if Adaptive Loop load line is active or inactive
• Leave open to disable Adaptive Loop load line
• Not used in Remote Sense Operation
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
AL nable Threshold VAL_ N
Pull below this value during start up 3.10 V
to enable AL load line
AL Disable Threshold VAL_DIS
Pull above this value during start up 3.20 V
to disable AL load line
Start up Minimum AL Disable RAL_DIS_MIN Minimum AL resistance required 10 MΩ
Resistance to disable AL load line
AL Capacitance CAL_ XT 100 pF
( xternal)
AL Sample Delay t NABL _AL From NABL high to AL sampled 100 140 200 µs
Internally generated VCC_INT 3.20 3.28 3.36 V
Analog Input VCC
Internal Pullup RAL_INT 0.5% tolerance resistor 9.83 10.00 10.18 kΩ
Resistance to VCC_INT
AL Pin Analog Range VAL_RANG 0 3.10 V
Normal AL Gain GAL Positive correction slope, VT inactive 1.0 Ω/V
Operation
AL Load Line Accuracy %ACC_LL_AL
Full load slope accuracy exclusive 0.5 2.0 %
of external resistor tolerance
AL Load Line Resolution LLAL_R S 3mΩ
Maximum Output VOUT_AL_MAX Maximum increase from no 5V
Referred Compensation load setpoint, VOUT ≤55.0 V
AL Latency tAL_LAT 60 120 240 µs
AL Bandwidth BWAL -3dB point 1.2 kHz
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
Rev 1.6
PRM™ Regulator
Page 12 of 42 09/2020

PRM48AH480x200A00
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
REF: Reference (Adaptive Loop Operation Only)
• Functions as R F pin in Adaptive Loop Operation
• R F represents the internal voltage reference for the voltage control circuit
• VOUT approximately equal to 20 times R F voltage
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
R F Voltage VR F VOUT = 48.0 V, trim inactive 2.4 V
R F to VOUT GR F_VOUT VOUT / VR F 20 V / V
Normal Scale Factor
Operation R F Resistance RR F_ XT 10 MΩ
Analog Output ( xternal)
R F Capacitance CR F_ XT 200 pF
( xternal)
R F Voltage Ripple VR F_PP Includes burst mode, 20 MHz BW 25 mV
NABL to R F Delay t NABL _R F NABL low to R F low 120 µs
Transition VAUX to R F Delay tVAUX_R F VAUX = 8.1 V to R F soft start
ramp initiated 1 ms
VT: VTM Temperature (Adaptive Loop Operation Only)
• VTM temperature compensation for Adaptive Loop regulation
• Adjusts the slope of the Adaptive Loop load line to account for changes in VTM output resistance over temperature
• Connect to TM pin of compatible downstream VTM to enable temperature compensation
• Leave disconnected to disable temperature compensation
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Internal Resistance RVT_INT 80.0 kΩ
to SGND
VT nable Threshold VVT_ N 2.1 V
VT Disable Threshold VVT_DIS
Pull below this value to disable VT 1.9 V
temperature compensation
VT Disable Default TVT_DIS Default AL temperature setting
Analog Input Normal Temperature when VT disabled 25 °C
Operation VT Analog Range VVT_OP 2.18 3.98 V
TCVT
VT within active range, referenced 30 %/V
VT Temperature to 2.98 V
Coefficient TCVT VTM TM voltage applied, .01V/°K,
referenced to 25°C 0.3 %/C
VT Resolution TCVT_R S VTM TM voltage applied, .01V/°K 0.4 °C
VT Latency tVT_LAT 60 120 240 µs
Bandwidth BWVT -3dB point 1.5 kHz
Rev 1.6
PRM™ Regulator
Page 13 of 42 09/2020

PRM48AH480x200A00
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
Share (Adaptive Loop and Child Operation Only)
• Functions as SHAR pin in parent child array configuration
• Current share bus for array operation (parent/child scheme)
• Sources current and provides SHAR signal in parent operation
• Sinks constant current when externally driven in active range (Child Operation)
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
SHAR Voltage VSHAR 0.79 7.40 V
Standalone/ Active Range
Analog Output Parent SHAR Available ISHAR VSHAR > 0.79 V 2.5 mA
Operation Current
SHAR Resistance RSHAR 93.3 kΩ
to SGND
Child SHAR Sink Current ISHAR _SINK VSHAR > 0.79 V 0.25 0.50 0.75 mA
Analog Input Operation
REF_EN: Reference Enable (Remote Sense and Child Operation Only)
• Functions as R F_ N pin in Remote Sense and Child Operation
• R F_ N signals successful start up and powertrain ready to operate
• Intended to power and enable the external feedback circuit reference in Remote Sense Operation
• 3.25 V, 4 mA regulated voltage source
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
R F_ N Voltage VR F_ N R F_ N unloaded 2.72 3.25 3.37 V
R F_ N Source ROUT_R F_ N 50 100 Ω
Impedance
Normal R F_ N Current IR F_ N 4mA
Analog Output
Operation R F_ N Capacitance CR F_ N_ XT 0.1 µF
( xternal)
R F_ N Voltage Ripple VR F_ N_PP Includes burst mode, 20 MHz BW 25 mV
NABL to R F_ N tNABL _R F_ N NABL low to R F_ N low 120 µs
Transition Delay
VAUX to R F_ N tVAUX_R F_ N VAUX = 8.1 V to R F_ N high 1 ms
Delay
Rev 1.6
PRM™ Regulator
Page 14 of 42 09/2020

PRM48AH480x200A00
Control Node (Remote Sense Operation Only)
• Functions as CONTROL NOD pin in Remote Sense Operation
• Modulator control node voltage sets power train timing
• Driven by external error amplifier in Remote Sense Operation
• Sinks constant current when externally driven in active range
• Sources current, and clamps voltage to 0.79 V when pulled below active range
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
CONTROL NOD VCN 0.79 7.40 V
Voltage Active Range
CONTROL NOD ICN_LOW VCN < 0.79 V 2.5 mA
Analog Input Normal Source Current
Operation CONTROL NOD ICN_SINK VCN > 0.79 V 0.25 0.50 0.75 mA
Sink Current
CONTROL NOD RCN 93.3 kΩ
Resistance to SGND
IFB: Current Feedback (Remote Sense Operation Only)
• Functions as IFB pin in Remote Sense Operation
• A voltage proportional to the PRM output current must be supplied externally to the IFB pin in order for the device to properly protect overcurrent events
and to enable output current limit (clamp)
• Overcurrent protection trip will cause instantaneous powertrain disable, detected after tBLANK
• Not used for Adaptive Loop Operation
Signal Type State Attribute Symbol Conditions / Notes Min Typ Max Unit
Current Limit (Clamp) VIN = 48.0 V; VOUT = 48.0 V
Threshold VIFB_IL TINT = 25°C 1.90 2.00 2.10 V
Over line, trim, and temperature 1.85 2.15 V
Not production tested; guaranteed
Analog Input Normal Overcurrent by design; TINT = 25°C 2.58 2.69 2.80 V
Operation Protection VIFB_OC Not production tested; guaranteed
Threshold by design; over line, trim, 2.56 2.82 V
and temperature
IFB Input Impedance RIFB 2.09 2.13 2.17 kΩ
Current Limit BWIL 2.0 kHz
Bandwidth
Signal Specifications (cont.)
Specifications apply over all line and load conditions, TINT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < TINT < 125ºC (T-grade).
NC: No Connect
• Reserved for factory use only
• No connections should be made to these pins
Rev 1.6
PRM™ Regulator
Page 15 of 42 09/2020

PRM48AH480x200A00
Functional Block Diagram
+OUT
-OUT
L
Q1
Q2
Q3 COUT
+IN
-IN
CIN
Q4
SH A RE/
CONTROL NODE
57.6 kΩ
35.7 kΩ
1000 pF
EN ABLE
TRIM
3.3 V
10 kΩ
1000 pF
NC
NC
10 kΩ
0.01 uF
AL
20
60.4
VT
2200
pF
VAUX
0.01 uF
2.1
30.1kΩ
IFB
0.01 uF
REF/
REF_EN
10
6800
pF
OTP
0.5 mA
2.5 mA Min
IN
OUT
PGND
SGN D
1.58
30.1
VCC
SGN D
VC
PGND
SGND
kΩ
10
kΩ 10 kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
Current
Limit
Adaptive
Loop
Output
Overvoltage
Protection
Undervoltage
Lockout
Overvoltage
Lockout
Output
Short
Circuit
Control and Monitoring
Error Amplifier
Voltage Reference
Modulator
Enable
Internal
VCC
Regulator
3.3 V
Linear
Regulator
Rev 1.6
PRM™ Regulator
Page 16 of 42 09/2020

PRM48AH480x200A00
High Level Functional State Diagram
Conditions that cause state transitions are shown along arrows. Sub-sequence activities listed inside the state bubbles.
STARTUP SEQUENCE
tON expired
ENABLE: 1.8mA to HIGH
VC Pulse
REF_EN active
Adaptive loop and trim modes latched
RS mode latched at first ENABLE
after Vin applied only
Powertrain Active
STANDBY SEQUENCE
ENABLE: 10uA to LOW
tOFF expired
ENABLE: 90uA to HIGH
Powertrain Stopped
Application of
Vin
ENABLE rising edge
ENABLE falling edge,
Output OVP or
OTP detected
FAULT SEQUENCE
ENABLE pulsed: 25mA to
LOW
Powertrain Stopped
VIN > UVLO+
ENABLE falling edge,
Output OVP,
or OTP detected
tSTARTUP_SEQ
expired
SUSTAINED
OPERATION
ENABLE: 1.8mA to HIGH
Powertrain Active
Input OVLO or UVLO,
Output UVP,
or UTP detected
Short Circuit detected
Input OVLO or UVLO,
Output UVP,
or UTP detected
Fault
Auto-
recovery
Rev 1.6
PRM™ Regulator
Page 17 of 42 09/2020

PRM48AH480x200A00
Timing Diagrams (Adaptive Loop Operation)
Module Inputs are shown in blue; Module Outputs are shown in brown.
REF
VOUT
ENABLE
SHARE
+IN
VC
VAUX
TRIM
Iout
VVC_START
3.3V
2.4V
tVC
tBLANK
1
INPUT POWER ON
AND UV TURNON
3
AL
ACTIVE
4
INPUT
OV
5
INPUT OV
RECOVERY
6
ENABLE
DISABLE
7
ENABLE
RELEASE
8
FULLLOAD
APPLIED
9
OUTPUT
OV
tOFF tON
tON
tBLANK
tBLANK
tAUX_REF
tPROT
tPROT
BIDIR BIDIR BIDIR
OUTPUT OUTPUT
OUTPUT
OUTPUT
INPUT
INPUT AL
VINIT
tOFF
1V
48V
55V
2.75V
1.0V
20V
0V
2
TRIM
INACTIVE
AL = 1V
tENABLE_VC
VIN_OVLO
VIN_UVLO
VSHARE_MAX
VSHARE_MIN
ILIMIT
VENABLE
VENABLE_EN
VOUT_OVP+
VOUT_MAX
VOUT_NOM
VOUT_MIN
VAUX
tSTARTUP_SEQ
AL = 1V
INPUT
VREF
FirstEnb: TR not low = not RS mode
TR high = trim inactive for this enabledperiod
AL not high= AL active for this enabled period
TR high = trim inactive for this enabledperiod
AL not high= AL active for this enabled period
TR high = trim inactive for this enabledperiod
AL not high= AL active for this enabled period
Soft Start
TRIM Ignored
Vout increases by
VAL * GAL * IOUT
TRIM and AL pins
sampled
Soft Start
Microcontroller
initialized
Current sense activated, and output
increase due to AL after tSTARTUP_SEQ
expires
Rev 1.6
PRM™ Regulator
Page 18 of 42 09/2020

PRM48AH480x200A00
REF
VOUT
ENABLE
SHARE
+IN
VC
VAUX
TRIM
Iout
VIN_OVLO
VENABLE_EN
VENABLE
VVC_START
VAUX
VSHARE_MIN
ILIMIT
VSHARE_MAX
10
INPUT POWER ON
AND UV TURNON
12
OUTPUT
SHORT
CIRCUIT
15
OUTPUT
POWER LIMIT
PROTECTION
16
CURRENT
LIMIT
EVENT
17
INPUT POWER OFF
AND
UV TURNOFF
tOFF
tSC
tBLANK
20V
INPUT
BIDIR BIDIR BIDIR
OUTPUT
OUTPUT OUTPUT OUTPUT
INPUT
INPUT
2.75V
AL
VINIT
1 V
3.3V
55V
2.4V
48V
1 V
2.4V
2.75V
3.3V
1V
14
OT SHUTDOWN
AND RECOVERY
13
ENABLE
TOGGLING
11
AL
INACTIVE AND
TRIM
ACTIVE
VOUT_MAX VOUT_MIN
VOUT_NOM
VIN_UVLO
tSTARTUP_SEQ
FirstEnb: TR not low = not RS mode
TR not high = trim ac ve for this enabled period
AL high = AL inac ve for this enabled period
TR not high = trim ac ve for this enabled period
AL high = AL inac ve for this enabled period
TR high = trim inac ve for this enabled period
AL not high = AL ac ve for this enabled period
TR high = trim inac ve for this enabled period
AL not high = AL ac ve for this enabled period
tLIM_SUPV
tSCR+tOFF
tBLANK
AL pin Ignored
VOUT = VTRIM * 20
VOUT clamped to 55V
for VTRIM > 2.75V
AL ac ve
Vout increase due to Iout and AL
aer tSTARTUP_SEQ expires
Opera ng Mode
Trim and AL state detected
Microcontroller
ini alized
Timing Diagrams (Adaptive Loop Operation) (cont.)
Module Inputs are shown in blue; Module Outputs are shown in brown.
Rev 1.6
PRM™ Regulator
Page 19 of 42 09/2020

PRM48AH480x200A00
REF_EN
VOUT
ENABLE
CONTROL
NODE
+IN
VC
VAUX
TRIM
IFB
VENABLE_EN
VENABLE
VVC_START
VCN_MAX
VAUX
VREF_EN
tVC
VIFB_OC
tBLANK
1
INPUT POWER ON AND UV
TURNON
t < tBLANK
2
QUICK OC
(t<tBLNK)
3
INPUT OV
VIFB_IL
4
INPUT OV
RECOVERY
5
ENABLE
DISABLE
6
ENABLE
RELEASE
7
FULL LOAD
APPLIED
8
LOAD RELEASE AND
OUTPUT OV (SLOW F/B)
tOFF tON
tON
tBLANK
tBLANK
tENABLE_REF_EN
tAUX_REF_EN
tPROT
tPROT
tENABLE_REF_EN
VCN_MIN
VIN_OVLO
VIN_UVLO
VOUT_OVP+
VINIT
tENABLE_REF_EN
This blue shaded region is where trim voltage is a don’t care.
RS opera ng mode is latched. TRIM is ignored un l Vin is
removed.
First Enable:
Trim Low = RS mode
RS mode detected and latched
TRIM ignored for all subsequent
start up events un l VIN is removed
Microcontroller
ini alized
Timing Diagrams (Remote Sense Operation)
Module Inputs are shown in blue; Module Outputs are shown in brown.
Rev 1.6
PRM™ Regulator
Page 20 of 42 09/2020