Linear Analog Devices ADI Power DC2570A Quick setup guide

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DEMO MANUAL DC2570A
DESCRIPTION
LTM4678
Dual 25A or Single 50A µModule Regulator with
Digital Power System Management,1×LTM4678, 50A
Demonstration circuit 2570A is a dual output, high effi-
ciency, high density, µModule
®
regulator with 4.5V to 16V
input range. The output voltage is adjustable from 0.5V
to 33V and it can supply 50A maximum load current. The
demo board has a LTM
®
4678 µModule regulator, which is
a dual 25A or single 50A step-down regulator with digital
power system management. Please see LTM4678 data
sheet for more detailed information.
DC2570A powers up to default settings and produces
power based on configuration resistors without the
need for any serial bus communication. This allows
easy evaluation of the DC/DC converter. To fully explore
the extensive power system management features of the
All registered trademarks and trademarks are the property of their respective owners.
part, download the GUI software LTpowerPlay
®
onto your
PC and use Analog Devices’I2C/SMBus/PMBus dongle
DC1613A to connect to the board. LTpowerPlay allows
the user to reconfigure the part on-the-fly and store the
configuration in EEPROM, view telemetry of voltage, cur-
rent, temperature and fault status.
GUI Download
The software can be downloaded from: LTpowerPlay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay GUI for LTM4678 Quick Start Guide.
Design files for this circuit board are available.
Figure 1. Single-Output 50A LTM4678/DC2570A Demo Circuit

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DEMO MANUAL DC2570A
QUICK START PROCEDURE
Table 1. LTM4678 Demo Boards for Up to 250A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUTS
NUMBER OF LTM4676 µModule
REGULATORS ON THE BOARD DEMO BOARD NUMBER
25A 2 1 DC2552A
50A 1 1 DC2570A
100A 1 2 DC2638A-A
150A 1 3 DC2638A-B
200A 1 4 DC2638A-C
250A 1 5 DC2638A-D
5. Once the proper output voltage is established, adjust the
load within the operating range and observe the output
voltage regulation, ripple voltage and otherparameters.
6. Connect the dongle and control the output voltages
from the GUI. See LTpowerPlay GUI for the LTM4678
Quick Start Guide for details.
Note:When measuring the output or input voltage
ripple, do not use the long ground lead on the oscil-
loscope probe. See Figure 3 for the proper scope probe
technique. Short, stiff leads need to be soldered to
the (+) and (–) terminals of an output capacitor. The
probe’s ground ring needs to touch the (–) lead and
the probe tip needs to touch the (+) lead.
PERFORMANCE SUMMARY
Specifications are at TA= 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range 4.5 16 V
Output Voltage, VOUT VIN = 4.5V to 16V, IOUT = 0A to 50A 0.5 1.0 3.3 V
Maximum Output Current, IOUT VIN = 4.5V to 16V, VOUT = 0.5V to 3.3V 50 A
Typical Efficiency VIN = 12V, VOUT = 1.0V, IOUT = 50A 86
(See Figure 5)
%
Default Switching Frequency 500 kHz
Demonstration circuit 2570A is easy to set up to evaluate
the performance of the LTM4678. Refer to Figure 2 for
the proper measurement equipment setup and follow the
procedure below.
1. With power off, connect the input power supply to VIN
(4.5V to 16V) and GND (input return).
2. Connect the 1.0V output load between VOUT and GND
(initial load: no load).
3. Connect the DVMs to the input and output. Set default
jumper position: SW1: ON.
4. Turn on the input power supply and check for the
proper output voltages. VOUT should be 1.0V ±0.5%.

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QUICK START PROCEDURE
Figure 2. Proper Measurement Equipment Setup
Figure 3. Measuring Output Voltage Ripple
+ –
V
OUT
GND
COUT
IIN
VIN
4.5V TO 16V
DC2570A F02
+
–IOUT
VOUT
LOAD1
0A-50A
–
+
–+
–+
–+

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DEMO MANUAL DC2570A
QUICK START PROCEDURE
set points, OV/UV limits, temperature fault limits,
sequencing parameters, the fault log, fault responses,
GPIOs and other functionalities. The DC1613A dongle
may be plugged when VIN is present.
Connecting a PC to DC2570A
You can use a PC to reconfigure the power management
features of the LTM4678 such as:nominal VOUT, margin
Figure 4. Demo Setup with PC
Figure 5. Efficiency vs Load Current at VOUT = 1.0V
INPUT POWER
SUPPLY
USB TO I2C/PMBus
DONGLE DC1613A
LTM4678 DEMO BOARD
DC2570A LOAD
USB CABLE
12-PIN (J1)
CONNECTOR DC2570A F04
VIN
VOUT
VIN = 5V
VIN = 12V
OUTPUT LOAD CURRENT (A)
0
5
10
15
20
25
30
35
40
45
50
70
75
80
85
90
95
EFFICIENCY (%)
DC2570A F05

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DEMO MANUAL DC2570A
QUICK START PROCEDURE
Figure 6. Output Voltage VOUT vs Load Current (VOUT=1.0V)
Figure 7. Output Voltage Ripple at VIN=12V, VOUT=1.0V, IOUT=50A
DC2570A F06
VOUT (20MHz BW) [50mV/DIV]
25A TO 37.5A LOAD STEP
100μs/DIV
DC2570A F07
VOUT (20MHz BW) [5mV/DIV]
2μs/DIV

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QUICK START PROCEDURE
Figure 8. Thermal at VIN=12V, VOUT=1.0V, IOUT=45A, TA=25°C, No Airflow
Figure 9. Thermal at VIN=12V, VOUT=1.0V, IOUT=50A, TA=25°C, 200LFM Airflow

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DEMO MANUAL DC2570A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows based develop-
ment environment that supports Analog Devices power
system management ICs and μModules, including the
LTM4675, LTM4676, LTM4677, LTM4678, LTC
®
3880,
LTC3882 and LTC3883. The software supports a variety
of different tasks. You can use LTpowerPlay to evaluate
Analog Devices ICs by connecting to a demo board sys-
tem. LTpowerPlay can also be used in an offline mode
(with no hardware present) in order to build a multichip
configuration file that can be saved and reloaded at a later
time. LTpowerPlay provides unprecedented diagnostic
and debug features. It becomes a valuable diagnostic tool
during board bring-up to program or tweak the power
management scheme in a system, or to diagnose power
issues when bringing up rails. LTpowerPlay utilizes the
DC1613A USB-to-SMBus controller to communicate with
one of many potential targets, including the LTM4675,
LTM4676A, LTM4677, LTM4678, LTC3880, LTC3882,
LTC3883’s demo system, or a customer board. The soft-
ware also provides an automatic update feature to keep
the software current with the latest set of device drivers
and documentation. The LTpowerPlay software can be
downloaded from:
LTpowerPlay
To access technical support documents for Analog
Devices Digital Power Products visit the LTpowerPlay Help
menu. Online help also available through the LTpowerPlay.
Figure 10. LTpowerPlay Main Interface

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DEMO MANUAL DC2570A
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4678.
1. Download and install the LTpowerPlay GUI:
LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2570A.
The system tree on the left hand side should look
like this:
b. A green message box shows for a few seconds in
the lower left hand corner, confirming that LTM4678
is communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTM4678. This reads the
configuration from the RAM of LTM4678 and loads
it into the GUI.
d. If you want to change the output voltage to a differ-
ent value, like 1.5V. In the Config tab, type in 1.5 in
the VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these reg-
ister values to the LTM4678. After finishing this step,
you will see the output voltage will change to1.5V.
If the write is successful, you will see the following
message:
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button, as following:
f. Save the demo board configuration to a (*.proj) file.
Click the Save icon and save the file. Name it what-
ever you want.

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DEMO MANUAL DC2570A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP., 150μF, ALUM POLY HYB, 35V, 20% PANASONIC, EEH-ZA1V151P
2 6 COUT1, COUT2, COUT3, COUT6,
COUT7, COUT8
CAP., 100μF, X5R, 6.3V, 20%,1210 AVX, 12106D107MAT2A
3 4 CIN2, CIN3, CIN4, CIN5 CAP., 10μF, X5R, 35V, 10%, 1210 AVX, 1210DD106KAT2A
NIC, NMC1210X5R106K35TRPLPF
4 4 COUT9, COUT10, COUT11, COUT12 CAP., 470μF, TANT. POSCAP, 4V, 20%, 7343, 10mΩ,
TPF, NO SUBS. ALLOWED
PANASONIC, 4TPF470ML
5 2 C14, C28 CAP., 0.01μF, X7R, 25V, 5%, 0603 AVX, 06033C103JAT2A
6 1 C15 CAP., 270pF, X7R, 25V, 5%, 0603 AVX, 06033C271JAT2A
7 2 C21, C24 CAP., 1μF, X5R, 25V, 10%, 0603 AVX, 06033D105KAT2A
NIC, NMC0603X5R105K25TRPF
8 1 C23 CAP., 1μF, X7R, 25V, 10%, 0805 AVX, 08053C105KAT2A
9 1 C26 CAP., 0.1μF, X5R, 16V, 10%, 0603 AVX, 0603YD104KAT2A
NIC, NMC0603X5R104K16TRPF
10 1 C30 CAP., 4.7μF, X5R, 6.3V, 10%, 0603 AVX, 06036D475KAT2A
MURATA, GRM188R60J475KE19D
TDK, C1608X5R0J475K080AB
11 1 C33 CAP., 2.2μF, X5R, 6.3V, 10%, 0603 AVX, 06036D225KAT2A
MURATA, GRM188R60J225KE19D
TAIYO YUDEN, JMK107BJ225KA-T
22 1 Q1 XSTR., MOSFET, N-CH,40V, TO-252 (DPAK) VISHAY, SUD50N04-8M8P-4GE3
23 1 Q19 XSTR., MOSFET, P-CH, 20V, 5.9A, TO-236 (SOT23-3) VISHAY, SI2365EDS-T1-GE3
24 12 R9, R28, R29, R33, R63, R65, R66,
R91, R92, R106, R107, R108
RES., 0Ω, 1/10W, 0603 NIC, NRC06ZOTRF
VISHAY, CRCW06030000Z0EA
25 13 R10, R11, R12, R13, R14, R15, R16,
R18, R19, R24, R52, R77, R95
RES., 10k, 1%, 1/10W, 0603, AEC-Q200 KOA SPEER, RK73H1JTTD1002F
PANASONIC, ERJ3EKF1002V
VISHAY, CRCW060310K0FKEA
26 3 R25, R32, R70 RES., 10Ω, 1%, 1/10W, 0603 NIC, NRC06F10R0TRF
PANASONIC, ERJ3EKF10R0V
ROHM, MCR03EZPFX10R0
VISHAY, CRCW060310R0FKEA
YAGEO, RC0603FR-0710RL
27 1 R27 RES., 22.6k, 1%, 1/10W, 0603 PANASONIC, ERJ3EKF2262V
ROHM, MCR03EZPFX2262
VISHAY, CRCW060322K6FKEA
28 2 R30, R31 RES., 2.43k, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW06032K43FKEA
30 1 R53 RES., 0.01Ω, 1%, 1/2W, 2010, SENSE, AEC-Q200 VISHAY, WSL2010R0100FEA
31 2 R72, R73 RES., 4.99k, 1%, 1/10W, 0603 NIC, NRC06F4991TRF
VISHAY, CRCW06034K99FKEA
32 1 R78 RES.,15.8k,1%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3EKF1582V
VISHAY, CRCW060315K8FKEA
33 1 R90 RES., 0.002Ω, 1%, 1/2W, 2010, SENSE, AEC-Q200 VISHAY, WSL20102L000FEA
43 1 TOOL, STENCIL, 700-DC2570A ANALOG DEVICES, 830-DC2570A
44 1 CAP., OPTION, 7343
45 1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10
46 0 PCA ASSY DWG, DC2570A

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PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
4 0 COUT4, COUT5 CAP., 70μF, TANT. POSCAP, 4V, 20%, 7343, 10mΩ, TPF,
NO SUBS. ALLOWED
PANASONIC, 4TPF470ML
29 0 R50 RES., 30Ω, 1%, 1W, 2512, AEC-Q200 VISHAY, CRCW251230R0FKEG
40 0 RES., OPTION, 0603
41 0 DIODE, OPTION, SOD-323
42 0 CAP., OPTION, 0603
38 0 PCA SCHEMATIC, DC2570A
Hardware for Demo Board Only
12 24 E2, E3, E4, E5, E6, E8, E9, E10, E11,
E12, E13, E14, E15, E16, E17, E18, E20,
E21, E22, E23, E24, E25, E26, E27
TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0
13 1 J1 CONN., SHROUDED HDR, MALE, 2×6, 2mm,
VERT, STR, THT
FCI, 98414-G06-12ULF
14 2 J2, J4 CONN., RF, BNC, RCPT JACK,5-PIN, STR, THT, 50Ω AMPHENOL RF, 112404
15 8 J7, J8, J9, J10 NUT, HEX, STEEL, ZINC PLATE, 10-32 KEYSTONE, 4705
16 4 J7, J8, J9, J10 STUD, FASTENER, #10-32 PENNENGINEERING, KFH-032-10ET
17 4 J7, J8, J9, J10 WASHER, FLAT, STEEL, ZINC PLATE, OD: 0.436 [11.1] KEYSTONE, 4703
18 4 J7, J8, J9, J10 RING, LUG, CRIMP, #10, NON-INSULATED,
SOLDERLESS TERMINALS
KEYSTONE, 8205
19 1 J11 CONN., HDR, FEMALE, 2×7, 2mm, R/A THT SULLINS CONNECTOR SOLUTIONS,
NPPN072FJFN-RC
20 1 J12 CONN., HDR, MALE, 2×7, 2mm, R/A THT MOLEX, 87760-1416
21 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.50" KEYSTONE, 8833
34 1 SW0 CONN., HDR., MALE, 1×3, 2mm, VERT, STR, THT, 10μ" Au SAMTEC, TMM-103-02-L-S
35 1 SW0 CONN., SHUNT, FEMALE, 2-POS, 2mm SAMTEC, 2SN-BK-G
36 1 U1 IC, DUAL 25A POP PSM MODULE, BGA-144
(16mm × 16mm × 6.16mm)
ANALOG DEVICES, LTM4678EY#PBF
37 1 U2 IC, MEMORY, EEPROM, 2-Kb (256×8), TSSOP-8, 400kHz MICROCHIP, 24LC025-I/ST
MICROCHIP, 24LC025T-I/ST
39 1 PCB, DC2570A MAO BANG, 600-DC2570A