Design DocumentAnalog
DC1989B-A Demo Manual: 50A Step-Down μModule Regulator with Digital Power System Management
Demonstration circuit DC1989B-A features two LTM4676A μModule regulators, delivering up to 50A at 0.5V to 4V from a 4.5V to 17V input with PMBus management.
Overview
Demonstration circuit 1989B-A is a high-efficiency, high-density step-down μModule regulator designed to evaluate the LTM4676AEY. The board utilizes two LTM4676A regulators to provide a single output of up to 50A with an input range of 4.5V to 17V. The output voltage is adjustable from 0.5V to 4V, with a default setting of 1V. This design features PMBus-compliant digital power system management, enabling telemetry of voltage, current, and temperature, as well as remote configuration of sequencing, margining, and fault responses via the LTpowerPlay GUI. It includes onboard EEPROM for configuration storage and is compatible with the DC1613A USB-to-I2C/SMBus/PMBus dongle.
Use Cases
- High-density point-of-load regulation
- Digital power system prototyping
- Cloud and data center power management
- Networking and telecommunications equipment
- Industrial power monitoring and control
Topics
LTM4676A
DC1989B-A
μModule Regulator
PMBus
Digital Power System Management
Step-Down Converter
LTpowerPlay
50A Output Current
EEPROM
Analog Devices
Linear Technology
Referenced Parts
35CE150AX
Sun Electronic Industries
CAP., 150μF, 35V, ALUMINUM ELECTR. SUN ELECTRONIC INDUSTRIES CORPORATION, 35CE150AX
DMP3130L-7
Diodes Inc
P-CHANNEL 30-V MOSFET DIODES INC., DMP3130L-7
575-4
Keystone
JACK, BANANA KEYSTONE 575-4
8205
Keystone
RING, LUG #10 KEYSTONE 8205
8833
Keystone
STAND-OFF, NYLON 0.50" tall, SNAP ON KEYSTONE, 8833
PMEG2005AEL
NXP
DIODE SCHOTTKY 20V 500MA SOD882 NXP SEMI. PMEG2005AEL
KFH-032-10
PEM
STUD, TESTPIN PEM KFH-032-10
2SN-KB-G
Samtec
SHUNT, 0.079" CENTER SAMTEC, 2SN-KB-G
50A
Maxim
supply 50A maximum load current. The demo board has
6-LEAD
Microchip
54 1 U9 IC, 24LC025T-I/ST SOT-23 6-LEAD MICROCHIP, 24LC025T-I/ST
SOD882
NXP
16 1 D8 DIODE SCHOTTKY 20V 500MA SOD882 NXP SEMI. PMEG2005AEL
D3L
Panasonic
CAP., 330μF, 6.3V, POSCAP, D3L PANASONIC, 6TPF330M9L
TO-236
Vishay
17 1 Q2 MOSFET P-CH 20V 5.9A TO-236 VISHAY SI2365EDS-T1-GE3
TO-252
Vishay
19 2 Q11, Q12 XSTR, N-CH 40V 14A TO-252 VISHAY SUD50N04-8M8P-4GE3
| 06033C471KAT2A | AVX | CAP., X7R, 470pF, 25V, 10%, 0603 AVX, 06033C471KAT2A |
| 0603YC221KAT2A | AVX | CAP., X7R, 220pF, 16V, 10%, 0603 AVX, 0603YC221KAT2A |
| 0603YC332KAT2A | AVX | CAP., X7R, 3.3nF, 16V, 10%, 0603 AVX, 0603YC332KAT2A |
| 0603YD104KAT2A | AVX | CAP., X5R, 100nF, 16V, 10%, 0603 AVX, 0603YD104KAT2A |
| 08053D105KAT2A | AVX | CAP., X5R, 1μF, 25V, 10%, 0805 AVX, 08053D105KAT2A |
| 08053D224KAT2A | AVX | CAP., X5R, 0.22μF, 25V, 10%, 0805 AVX, 08053D224KAT2A |
| 12063C104KAT2A | AVX | CAP., X7R, 0.1μF, 25V, 10%, 1206 AVX, 12063C104KAT2A |
| 12063D105KAT2A | AVX | CAP., X5R, 1μF, 25V, 10%, 1206 AVX, 12063D105KAT2A |
| 12106D107KAT2A | AVX | CAP., X5R, 100μF, 6.3V, 20% 1210 AVX, 12106D107KAT2A |
| 1210DD106KAT2A | AVX | CAP., X5R, 10μF, 35V, 10%, 1210 AVX, 1210DD106KAT2A |
| LT1129CS8-5#PBF | Analog Devices | IC., LT1129CS8-5, S8 LINEAR TECH. LT1129CS8-5#PBF |
| LT1803IS5#PBF | Analog Devices | IC., LT1803IS5, S5-TSOT LINEAR TECH. LT1803IS5#PBF |
| LTC6992CS6-1#PBF | Analog Devices | IC., LTC6992-1, S6-TSOT LINEAR TECH. LTC6992CS6-1#PBF |
| 3386P-1-502LF | Bourns | TRIMMING POTENTIOMETER, 5k BOURNS, 3386P-1-502LF |
| JS202011CQN | C&K | CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN |
| DF3A-4P-2DSA | Hirose | HEADER, 4 PINS, SHROUDED HIROSE, DF3A-4P-2DSA |
| 24LC025T-I/ST | Microchip | IC, 24LC025T-I/ST SOT-23 6-LEAD MICROCHIP, 24LC025T-I/ST |
| 2308-2-00-80-00-00-07-0 | Mill-Max | TESTPOINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0 |
| 87760-1416 | Molex | HEADER 14POS 2MM R/A GOLD (M) MOLEX, 87760-1416 |
| GRM188R61E475KE11D | Murata | CAP., X5R, 4.7μF, 25V, 10%, 0603 MURATA, GRM188R61E475KE11D |
| 6TPF330M9L | Panasonic | CAP., 330μF, 6.3V, POSCAP, D3L PANASONIC, 6TPF330M9L |
| ERJ-3EKF7870V | Panasonic | RES., CHIP, 787Ω, 1%, 0603 PANASONIC ERJ-3EKF7870V |
| NPPN072FJFN-RC | Sullins | CONN RECEPT 2MM DUAL R/A 14POS (F) SULLINS, NPPN072FJFN-RC |
| 35CE150AX | Sun Electronic Industries | CAP., 150μF, 35V, ALUMINUM ELECTR. SUN ELECTRONIC INDUSTRIES CORPORATION, 35CE150AX |
| CRCW06030000Z0EA | Vishay | RES., CHIP, 0Ω, 1%, 0603 VISHAY CRCW06030000Z0EA |
| CRCW0603100KFKEA | Vishay | RES., CHIP, 100k, 1%, 0603 VISHAY CRCW0603100KFKEA |
| CRCW0603100RFKEA | Vishay | RES., CHIP, 100Ω, 1%, 0603 VISHAY CRCW0603100RFKEA |
| 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 |
| CRCW0603154KFKEA | Vishay | RES., CHIP, 154k, 1%, 0603 VISHAY CRCW0603154KFKEA |
| CRCW060315K8FKEA | Vishay | RES., CHIP, 15.8k, 1%, 0603 VISHAY CRCW060315K8FKEA |
| CRCW06031K65FKEA | Vishay | RES., CHIP, 1.65k, 1%, 0603 VISHAY CRCW06031K65FKEA |
| CRCW06031M00FKEA | Vishay | RES., CHIP, 1M, 1%, 0603 VISHAY CRCW06031M00FKEA |
| CRCW0603200RFKEA | Vishay | RES., CHIP, 200Ω, 1%, 0603 VISHAY CRCW0603200RFKEA |
| CRCW060320K0FKEA | Vishay | RES., CHIP, 20k, 1%, 0603 VISHAY CRCW060320K0FKEA |
| CRCW060322K6FKEA | Vishay | RES., CHIP, 22.6k, 1%, 0603 VISHAY CRCW060322K6FKEA |
| CRCW06032K80FKEA | Vishay | RES., CHIP, 2.8k, 1%, 0603 VISHAY CRCW06032K80FKEA |
| CRCW06032R00FKEA | Vishay | RES., CHIP, 2Ω, 1%, 0603 VISHAY CRCW06032R00FKEA |
| CRCW06033R30FKEA | Vishay | RES., CHIP, 3.3Ω, 1%, 0603 VISHAY CRCW06033R30FKEA |
| CRCW06034K99FKEA | Vishay | RES., CHIP, 4.99k, 1%, 0603 VISHAY CRCW06034K99FKEA |
| CRCW060351K0FKEA | Vishay | RES., CHIP, 51k, 1%, 0603 VISHAY CRCW060351K0FKEA |
| CRCW0603681KFKEA | Vishay | RES., CHIP, 681k, 1%, 0603 VISHAY CRCW0603681KFKEA |
| CRCW060382R5FKEA | Vishay | RES., CHIP, 82.5Ω, 1%, 0603 VISHAY CRCW060382R5FKEA |
| CRCW20100000Z0EF | Vishay | RES., CHIP, 0Ω, 1%, 2010 VISHAY CRCW20100000Z0EF |
| SI2365EDS-T1-GE3 | Vishay | MOSFET P-CH 20V 5.9A TO-236 VISHAY SI2365EDS-T1-GE3 |
| SUD50N04-8M8P-4GE3 | Vishay | XSTR, N-CH 40V 14A TO-252 VISHAY SUD50N04-8M8P-4GE3 |
| WSL2010R0100FEA | Vishay | RES., CHIP, 0.01Ω, 1%, 2010 VISHAY, WSL2010R0100FEA |
| NRPN031PAEN-RC | Sullins | HEADER, 1X3 PIN 0.079" SINGLE ROW SULLIN, NRPN031PAEN-RC |
| ERJ-3EKF7870V | Panasonic | 37 1 R19 RES., CHIP, 787Ω, 1%, 0603 PANASONIC ERJ-3EKF7870V |
| CRCW0603100KFKEA | Vishay | 48 1 R109 RES., CHIP, 100k, 1%, 0603 VISHAY CRCW0603100KFKEA |
| CRCW0603100RFKEA | Vishay | 35 1 R112 RES., CHIP, 100Ω, 1%, 0603 VISHAY CRCW0603100RFKEA |
| CRCW060310R0FKEA | Vishay | 34 2 R16, R41 RES., CHIP, 10Ω, 1%, 0603 VISHAY CRCW060310R0FKEA |
| CRCW0603127RFKEA | Vishay | 42 1 R86 RES., CHIP, 127Ω, 1%, 0603 VISHAY CRCW0603127RFKEA |
| CRCW0603154KFKEA | Vishay | 51 1 R114 RES., CHIP, 154k, 1%, 0603 VISHAY CRCW0603154KFKEA |
| CRCW060315K8FKEA | Vishay | 39 1 R141 RES., CHIP, 15.8k, 1%, 0603 VISHAY CRCW060315K8FKEA |
| CRCW06031K65FKEA | Vishay | 33 2 R40, R42 RES., CHIP, 1.65k, 1%, 0603 VISHAY CRCW06031K65FKEA |
| CRCW06031M00FKEA | Vishay | 43 1 R123 RES., CHIP, 1M, 1%, 0603 VISHAY CRCW06031M00FKEA |
| CRCW0603200RFKEA | Vishay | 41 2 R85, R124 RES., CHIP, 200Ω, 1%, 0603 VISHAY CRCW0603200RFKEA |
| CRCW060320K0FKEA | Vishay | 50 2 R111, R115 RES., CHIP, 20k, 1%, 0603 VISHAY CRCW060320K0FKEA |
| CRCW060322K6FKEA | Vishay | 28 1 R20 RES., CHIP, 22.6k, 1%, 0603 VISHAY CRCW060322K6FKEA |
| CRCW06032K80FKEA | Vishay | 32 1 R14 RES., CHIP, 2.8k, 1%, 0603 VISHAY CRCW06032K80FKEA |
| CRCW06032R00FKEA | Vishay | 52 1 R117 RES., CHIP, 2Ω, 1%, 0603 VISHAY CRCW06032R00FKEA |
| CRCW06033R30FKEA | Vishay | 45 1 R106 RES., CHIP, 3.3Ω, 1%, 0603 VISHAY CRCW06033R30FKEA |
| CRCW06034K99FKEA | Vishay | 40 2 R134, R144 RES., CHIP, 4.99k, 1%, 0603 VISHAY CRCW06034K99FKEA |
| CRCW060351K0FKEA | Vishay | 38 1 R27 RES., CHIP, 51k, 1%, 0603 VISHAY CRCW060351K0FKEA |
| CRCW0603681KFKEA | Vishay | 44 1 R105 RES., CHIP, 681k, 1%, 0603 VISHAY CRCW0603681KFKEA |
| CRCW060382R5FKEA | Vishay | 46 1 R107 RES., CHIP, 82.5Ω, 1%, 0603 VISHAY CRCW060382R5FKEA |
| CRCW20100000Z0EF | Vishay | 30 4 R49, R51, R53, R54 RES., CHIP, 0Ω, 1%, 2010 VISHAY CRCW20100000Z0EF |
| SI2365EDS-T1-GE3 | Vishay | 17 1 Q2 MOSFET P-CH 20V 5.9A TO-236 VISHAY SI2365EDS-T1-GE3 |
| SUD50N04-8M8P-4GE3 | Vishay | 19 2 Q11, Q12 XSTR, N-CH 40V 14A TO-252 VISHAY SUD50N04-8M8P-4GE3 |
| LTM4676AEY#PBF | Analog Devices | IC, LTM4676AEY LINEAR TECH., LTM4676AEY#PBF |
| 112404 | CONNEX | CONN, BNC, 5PINS CONNEX, 112404 |
| 98414-G06-12ULF | FCI | CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF |
| 2N7002K | Fairchild | MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002K |
| 150060GS75000 | Wurth Electronics | LED, 0603 GREEN WURTH ELEKTRONIK 150060GS75000 |
| 150060SS75000 | Wurth Electronics | LED, 0603 RED WURTH ELEKTRONIK 150060SS75000 |
| 150060GS75000 | Wurth Electronics | 14 2 D1, D2 LED, 0603 GREEN WURTH ELEKTRONIK 150060GS75000 |
| 150060SS75000 | Wurth Electronics | 15 1 D3 LED, 0603 RED WURTH ELEKTRONIK 150060SS75000 |
| DMP3130L-7 | Diodes Inc | P-CHANNEL 30-V MOSFET DIODES INC., DMP3130L-7 |
| 575-4 | Keystone | JACK, BANANA KEYSTONE 575-4 |
| 8205 | Keystone | RING, LUG #10 KEYSTONE 8205 |
| 8833 | Keystone | STAND-OFF, NYLON 0.50" tall, SNAP ON KEYSTONE, 8833 |
| PMEG2005AEL | NXP | DIODE SCHOTTKY 20V 500MA SOD882 NXP SEMI. PMEG2005AEL |
| KFH-032-10 | PEM | STUD, TESTPIN PEM KFH-032-10 |
| 2SN-KB-G | Samtec | SHUNT, 0.079" CENTER SAMTEC, 2SN-KB-G |
| 50A | Maxim | supply 50A maximum load current. The demo board has |
| 6-LEAD | Microchip | 54 1 U9 IC, 24LC025T-I/ST SOT-23 6-LEAD MICROCHIP, 24LC025T-I/ST |
| SOD882 | NXP | 16 1 D8 DIODE SCHOTTKY 20V 500MA SOD882 NXP SEMI. PMEG2005AEL |
| D3L | Panasonic | CAP., 330μF, 6.3V, POSCAP, D3L PANASONIC, 6TPF330M9L |
| TO-236 | Vishay | 17 1 Q2 MOSFET P-CH 20V 5.9A TO-236 VISHAY SI2365EDS-T1-GE3 |
| TO-252 | Vishay | 19 2 Q11, Q12 XSTR, N-CH 40V 14A TO-252 VISHAY SUD50N04-8M8P-4GE3 |