Skip to main content
Design DocumentAnalog

DC3107A: LTM4640 20A Step-Down μModule Regulator Evaluation Board

User guide for the DC3107A evaluation board featuring the LTM4640 20A step-down μModule regulator with 3.1V to 20V input and 0.6V to 3.3V programmable output.

View design document

Overview

The DC3107A evaluation board demonstrates the performance of the LTM4640, a high-efficiency DC-to-DC point-of-load (POL) regulator. This μModule (micromodule) regulator supports an input voltage range of 3.1V to 20V and provides a continuous output current of up to 20A. The output voltage is programmable from 0.6V to 3.3V and features remote sensing for precision regulation. The design incorporates current mode control for fast transient response, external frequency synchronization, and a stacked inductor for enhanced thermal dissipation. Users can select between continuous-conduction mode (CCM) and discontinuous-conduction mode (DCM) for improved light-load efficiency. The document includes detailed setup procedures, thermal captures, performance curves, a complete bill of materials, and hardware schematics.

Use Cases

  • High-current point-of-load power supplies
  • Telecom and networking equipment power systems
  • Industrial power regulation
  • High-density DC-DC conversion
  • Supply rail sequencing and tracking applications

Topics

LTM4640
DC3107A
Analog Devices
μModule regulator
step-down regulator
point-of-load
20A buck regulator
stacked inductor
power module
POL regulator

Referenced Parts

XEL4020-800MEC

Coilcraft

IND., 0.08μH, PWR, 20%, 21.4A, 1.8mΩ, 4mm × 4mm

ERJ3GEYJ154V

Panasonic

RES., 150kΩ, 5%, 1/10W, 0603, AEC-Q200

2SN-BK-G

Samtec

CONN., SHUNT, FEMALE, 2-POS, 2mm

35HVH220M+P

Sun Electronic Industries

CAP., 220μF, ALUM HYB, 35V, 20%, 10mm ×12.5mm, RADIAL

112404

Amphenol RF

CONN., RF, BNC, RCPT, JACK, 5-PIN, ST, THT, 50Ω

LTM4640EY#PBF

Analog Devices

IC, STEP-DOWN μModule REG., BGA-49

575-4

Keystone

CONN., BANANA JACK, FEMALE, THT, NON-INSULATED

8831

Keystone

STANDOFF, NYLON, SNAP-ON, 0.25" (6.4mm)

NRC06F3091TRF

NIC

RES., 3.09kΩ, 1%, 1/10W, 0603

NRC06F6651TRF

NIC

RES., 6.65kΩ, 1%, 1/10W, 0603

RMCF0603FG100K

Stackpole Electronics

RES., 100kΩ, 1%, 1/10W, 0603

NRPN021PAEN-RC

Sullins Connector Solutions

CONN., HDR, MALE, 1 × 2, 2mm, VERT, ST, THT

NRPN032PAEN-RC

Sullins Connector Solutions

CONN., HDR, MALE, 2 × 3, 2mm, VERT, ST, THT

BGA-49

Analog Devices

25 1 U1 IC, STEP-DOWN μModule REG., BGA-49 ANALOG DEVICES, LTM4640EY#PBF

6.4mm

Keystone

0.25" (6.4mm) KEYSTONE, 8831

AEC-Q200

Panasonic

18 1 R7 RES., 150kΩ, 5%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3GEYJ154V

2mm

Samtec

8 3 XJP1, XJP7, XJP8 CONN., SHUNT, FEMALE, 2-POS, 2mm SAMTEC, 2SN-BK-G

AEC-Q200

Vishay

15 1 R3 RES., 10kΩ, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060310K0FKEA

AEC-Q200

Vishay

SENSE, AEC-Q200 VISHAY, WSL25125L000FEA

AEC-Q200

Vishay

23 1 R17 RES., 0Ω, 1/10W, 0603, AEC-Q200 VISHAY, CRCW06030000Z0EA

TO-252

Vishay

(TO-252) VISHAY, SUD50N04-8M8P-4GE3

DC3107A: LTM4640 20A Step-Down μModule Regulator Evaluation Board | Design Resources