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
Page 8 of 42 09/2020

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
Page 10 of 42 09/2020