2R5TPE470M7
Panasonic
The DC2174A uses 2.5V-rated low ESR PosCAP (Part No. 2R5TPE470M7) as output capacitors
Design DocumentAnalog
DC2174A Demonstration Circuit for LTC3882 Step-Down DC/DC Converter
Design document for DC2174A demo board featuring the LTC3882 dual-phase buck converter with PMBus for power system management and high current output up to 70A.
Overview
This document describes the DC2174A demonstration circuit, a high-efficiency dual-phase synchronous buck converter using the LTC3882EUJ voltage mode controller. The board supports PMBus power system management and telemetry. It is offered in two configurations: the DC2174A-A for dual 35A outputs (1.5V and 1.0V) and the DC2174A-B for a single 70A output (1.0V). Operating from a 7V to 14V input range, the design features default operation via configuration resistors or non-volatile memory and is compatible with LTpowerPlay software for real-time monitoring and configuration of voltage, current, and temperature parameters.
Use Cases
- High-current DC/DC power supply design
- PMBus telemetry and power management evaluation
- FPGA and ASIC power rail prototyping
- High-efficiency voltage regulator development
Topics
LTC3882
LTC3882EUJ
DC2174A
PMBus
step-down converter
dual-phase buck
power system management
LTpowerPlay
telemetry
DrMOS
Referenced Parts
LTC3882EUJ
Linear Technology
dual-phase synchronous buck converter featuring the LTC®3882EUJ, a dual output voltage mode controller
JS202011CQN
C&K Components
CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K.,JS202011CQN
112404
Connex
CONN, BNC, 5PINS CONNEX, 112404
FP1007R3-R17-R
Cooper Industries
IND., 0.17μH COOPER., FP1007R3-R17-R
2N7002-7-F
Diodes Inc.
MOSFET, N-CH 60V 115MA SOT23 DIODES INC., 2N7002-7-F
98414-G06-12ULF
FCI
HEADER 12POS 2mm STR DL PCB FCI, 98414-G06-12ULF
FDMF5820DC
Fairchild Semiconductor
IC, HIGH FREQUENCY DrMOS MODULE FAIRCHILD, FDMF5820DC
575-4
Keystone
BANANA SMALL KEYSTONE, 575-4
8205
Keystone
RING, LUG #10 KEYSTONE, 8205
LT3029IMSE#PBF
Linear Technology
IC, LT3029IMSE, MSOP, 16PIN LTC., LT3029IMSE#PBF
LTC3882EUJ#10BP-1PBF-ES
Linear Technology
IC, LTC3882EUJ, QFN 6mm x 6mm LINEAR TECH., LTC3882EUJ#10BP-1PBF-ES
PMEG2005AEL,315
NXP Semiconductors
DIODE, ULTRA LOW SCHOTTKY RECTIFIER NXP SEMI. PMEG2005AEL,315
KFH-032-10
PEM
STUD, TESTPIN PEM, KFH-032-10
ERJ-M1WTF1MOU
Panasonic
SENSE RES., 0.001Ω, 1W, 1%, 2512 PANASONIC, ERJ-M1WTF1MOU
GMK316BJ106ML
Taiyo Yuden
CAP., X5R 10μF 35V 1206 TAIYO YUDEN GMK316BJ106ML
CRCW060310K0JKEA
Vishay
RES., CHIP, 10k, 5%, 0603 VISHAY, CRCW060310K0JKEA
CRCW0603200RFKED
Vishay
RES., CHIP, 200Ω, 1%, 0603 VISHAY, CRCW0603200RFKED
620 003 111 21
Wurth
HEADER, 3 PIN 0.079 SINGLE ROW WURTH, 620 003 111 21
GMK316BJ106ML
Taiyo Yuden
5 2 COUT3, COUT7 CAP., X5R 10μF 35V 1206 TAIYO YUDEN GMK316BJ106ML
SOT23
Diodes
6 2 Q21, Q22 MOSFET, N-CH 60V 115MA SOT23 DIODES INC., 2N7002-7-F
8TSSOP
Microchip
27 1 U5 IC EEPROM 2KBIT 400KHZ 8TSSOP MICROCHIP, 24LC025-I/ST
8TSSOP
Microchip
27 1 U5 IC EEPROM 2KBIT 400kHZ 8TSSOP MICROCHIP, 24LC025-I/ST
F12
Panasonic
10 2 C3, C4 CAP., OS-CON, 330μF, 16V, 20%, F12 PANASONIC, 16SVP330M
SOT-23
Vishay
5 2 Q19, Q20 MOSFET, P-CH 20V 0.58A SOT-23 VISHAY, TP0101K-T1-E3
| 2R5TPE470M7 | Panasonic | The DC2174A uses 2.5V-rated low ESR PosCAP (Part No. 2R5TPE470M7) as output capacitors |
| 04023A100KAT2A | AVX | CAP., NP0, 10pF, 25V, 10%, 0402 AVX, 04023A100KAT2A |
| 04025A560GAT2A | AVX | CAP., NP0, 56pF, 25V, 10%, 0402 AVX, 04025A560GAT2A |
| 0402YC103KAT2A | AVX | CAP., X7R, 0.01μF,16V, 10%, 0402 AVX, 0402YC103KAT2A |
| 0402YC104KAT2A | AVX | CAP., X7R, 0.1μF,16V, 10%, 0402 AVX, 0402YC104KAT2A |
| 06035C103KAT2A | AVX | CAP., X7R 0.01μF 50V 10% 0603 AVX, 06035C103KAT2A |
| 0603YC103KAT2A | AVX | CAP., X7R, 0.01μF,16V, 10%, 0603 AVX, 0603YC103KAT2A |
| 0603YC104KAT2A | AVX | CAP., X7R, 0.1μF,16V, 10%, 0603 AVX, 0603YC104KAT2A |
| 0805YC104MAT2A | AVX | CAP., X7R, 0.1μF, 16V, 20%, 0805 AVX, 0805YC104MAT2A |
| 0805YD105KAT2A | AVX | CAP., X5R, 1μF, 16V, .10%, 0805 AVX, 0805YD105KAT2A |
| 1206YC105KAT2A | AVX | CAP., X7R 1μF 16V 10% 1206 AVX, 1206YC105KAT2A |
| CMDSH-3TR | Central Semiconductor | DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR |
| DF3A-4P-2DSA | Hirose | HEADER, 4 PINS, SHROUDED HIROSE, DF3A-4P-2DSA |
| LTST-C193KGKT-5A | Lite-On | LED, GREEN RECT CLEAR 0603 LITE ON, LTST-C193KGKT-5A |
| LTST-C193KRKT-5A | Lite-On | LED, RED RECT CLEAR 0603 LITE ON, LTST-C193KRKT-5A |
| 24LC025-I/ST | Microchip | IC EEPROM 2KBIT 400kHZ 8TSSOP MICROCHIP, 24LC025-I/ST |
| 2503-2-00-80-00-00-07-0 | Mill-Max | TESTPOINT, TURRET, .094" MILL-MAX, 2503-2-00-80-00-00-07-0 |
| 87760-1416 | Molex | HEADER 14POS 2mm R/A GOLD (M) MOLEX, 87760-1416 |
| GRM155R61A105ME15D | Murata | CAP., X5R, 1μF, 10V, 20%, 0402 MURATA, GRM155R61A105ME15D |
| GRM155R71H152KA01D | Murata | CAP., X7R, 1.5nF, 50V, 10%, 0402 MURATA, GRM155R71H152KA01D |
| GRM155R71H221KA01D | Murata | CAP., X7R, 220pF, 50V, 10%, 0402 MURATA, GRM155R71H221KA01D |
| GRM31CR60J107ME39L | Murata | CAP., X5R, 100μF, 6.3V, 20%,1206 MURATA, GRM31CR60J107ME39L |
| GRM32ER61E226KE15L | Murata | CAP., X5R, 22μF, 25V, 10%,1210 MURATA, GRM32ER61E226KE15L |
| 16SVP330M | Panasonic | CAP., OS-CON, 330μF, 16V, 20%, F12 PANASONIC, 16SVP330M |
| ERJ-M1WSF10MU | Panasonic | SENSE RES., 0.010Ω, 1W, 1%, 2512 PANASONIC, ERJ-M1WSF10MU |
| RJK0305DPB-00-J0 | Renesas | MOSFET, SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-00#J0 |
| CL05A475MQ5NRNC | Samsung | CAP., X5R 0402 4.7μF 6.3V 20% SAMSUNG, CL05A475MQ5NRNC |
| 2SN-BK-G | Samtec | SHUNT SAMTEC, 2SN-BK-G |
| NPPN072FJFN-RC | Sullins | CONN RECEPT 2mm DUAL R/A 14POS (F) SULLINS, NPPN072FJFN-RC |
| C1005X5R1C224K | TDK | CAP., X5R, 0.22μF, 16V, 10%, 0402 TDK, C1005X5R1C224K |
| CRCW04020000Z0ED | Vishay | RES., CHIP, 0Ω, 0402 VISHAY, CRCW04020000Z0ED |
| CRCW04021K00FKED | Vishay | RES., CHIP, 1k, 1%, 0402 VISHAY, CRCW04021K00FKED |
| CRCW04021R00FKED | Vishay | RES., CHIP, 1Ω, 1%, 0402 VISHAY, CRCW04021R00FKED |
| CRCW040224K9FKED | Vishay | RES., CHIP, 24.9k, 1%, 0402 VISHAY, CRCW040224K9FKED |
| CRCW04022K67FKED | Vishay | RES., CHIP, 2.67k, 1%, 0402 VISHAY, CRCW04022K67FKED |
| CRCW0402499RFKED | Vishay | RES., CHIP, 499Ω, 1%, 0402 VISHAY, CRCW0402499RFKED |
| CRCW04027K32FKED | Vishay | RES., CHIP, 7.32k, 1%, 0402 VISHAY, CRCW04027K32FKED |
| CRCW06030000Z0EA | Vishay | RES., CHIP, 0Ω, 0603 VISHAY, CRCW06030000Z0EA |
| CRCW060310K0FKEA | Vishay | RES., CHIP, 10k, 1%, 0603 VISHAY, CRCW060310K0FKEA |
| CRCW060310R0FKEA | Vishay | RES., CHIP, 10Ω, 1%, 0603 VISHAY, CRCW060310R0FKEA |
| CRCW0603127RFKEA | Vishay | RES., CHIP, 127Ω, 1%, 0603 VISHAY, CRCW0603127RFKEA |
| CRCW060315K8FKEA | Vishay | RES., CHIP, 15.8k, 1%, 0603 VISHAY, CRCW060315K8FKEA |
| CRCW06032K00FKEA | Vishay | RES., CHIP, 2k, 1%, 0603 VISHAY, CRCW06032K00FKEA |
| CRCW06034K99FKEA | Vishay | RES., CHIP, 4.99k, 1%, 0603 VISHAY, CRCW06034K99FKEA |
| CRCW06036K19FKEA | Vishay | RES., CHIP, 6.19k, 1%, 0603 VISHAY, CRCW06036K19FKEA |
| TP0101K-T1-E3 | Vishay | MOSFET, P-CH 20V 0.58A SOT-23 VISHAY, TP0101K-T1-E3 |
| MMBT3906TT1G | Onsemi | TRANS, PNP GP 40V 200MA SC75-3 ON SEMI, MMBT3906TT1G |
| LTC3882EUJ | Linear Technology | dual-phase synchronous buck converter featuring the LTC®3882EUJ, a dual output voltage mode controller |
| JS202011CQN | C&K Components | CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K.,JS202011CQN |
| 112404 | Connex | CONN, BNC, 5PINS CONNEX, 112404 |
| FP1007R3-R17-R | Cooper Industries | IND., 0.17μH COOPER., FP1007R3-R17-R |
| 2N7002-7-F | Diodes Inc. | MOSFET, N-CH 60V 115MA SOT23 DIODES INC., 2N7002-7-F |
| 98414-G06-12ULF | FCI | HEADER 12POS 2mm STR DL PCB FCI, 98414-G06-12ULF |
| FDMF5820DC | Fairchild Semiconductor | IC, HIGH FREQUENCY DrMOS MODULE FAIRCHILD, FDMF5820DC |
| 575-4 | Keystone | BANANA SMALL KEYSTONE, 575-4 |
| 8205 | Keystone | RING, LUG #10 KEYSTONE, 8205 |
| LT3029IMSE#PBF | Linear Technology | IC, LT3029IMSE, MSOP, 16PIN LTC., LT3029IMSE#PBF |
| LTC3882EUJ#10BP-1PBF-ES | Linear Technology | IC, LTC3882EUJ, QFN 6mm x 6mm LINEAR TECH., LTC3882EUJ#10BP-1PBF-ES |
| PMEG2005AEL,315 | NXP Semiconductors | DIODE, ULTRA LOW SCHOTTKY RECTIFIER NXP SEMI. PMEG2005AEL,315 |
| KFH-032-10 | PEM | STUD, TESTPIN PEM, KFH-032-10 |
| ERJ-M1WTF1MOU | Panasonic | SENSE RES., 0.001Ω, 1W, 1%, 2512 PANASONIC, ERJ-M1WTF1MOU |
| GMK316BJ106ML | Taiyo Yuden | CAP., X5R 10μF 35V 1206 TAIYO YUDEN GMK316BJ106ML |
| CRCW060310K0JKEA | Vishay | RES., CHIP, 10k, 5%, 0603 VISHAY, CRCW060310K0JKEA |
| CRCW0603200RFKED | Vishay | RES., CHIP, 200Ω, 1%, 0603 VISHAY, CRCW0603200RFKED |
| 620 003 111 21 | Wurth | HEADER, 3 PIN 0.079 SINGLE ROW WURTH, 620 003 111 21 |
| GMK316BJ106ML | Taiyo Yuden | 5 2 COUT3, COUT7 CAP., X5R 10μF 35V 1206 TAIYO YUDEN GMK316BJ106ML |
| SOT23 | Diodes | 6 2 Q21, Q22 MOSFET, N-CH 60V 115MA SOT23 DIODES INC., 2N7002-7-F |
| 8TSSOP | Microchip | 27 1 U5 IC EEPROM 2KBIT 400KHZ 8TSSOP MICROCHIP, 24LC025-I/ST |
| 8TSSOP | Microchip | 27 1 U5 IC EEPROM 2KBIT 400kHZ 8TSSOP MICROCHIP, 24LC025-I/ST |
| F12 | Panasonic | 10 2 C3, C4 CAP., OS-CON, 330μF, 16V, 20%, F12 PANASONIC, 16SVP330M |
| SOT-23 | Vishay | 5 2 Q19, Q20 MOSFET, P-CH 20V 0.58A SOT-23 VISHAY, TP0101K-T1-E3 |