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.
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
Referenced Parts
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
| 06033C101JAT2A | AVX | CAP., 100pF, X7R, 25V, 5%, 0603 |
| 06033C104KAT2A | AVX | CAP., 0.1μF, X7R, 25V, 10%, 0603 |
| 12063D226KAT2A | AVX | CAP., 22μF, X5R, 25V, 10%, 1206 |
| XEL4020-800MEC | Coilcraft | IND., 0.08μH, PWR, 20%, 21.4A, 1.8mΩ, 4mm × 4mm |
| C0603C223K5RAC7867 | Kemet | CAP., 0.022μF, X7R, 50V, 10%, 0603 |
| 2308-2-00-80-00-00-07-0 | Mill-Max | TEST POINT, TURRET, 0.064" MTG. HOLE |
| GRM155R70J105KA12D | Murata | CAP., 1μF, X7R, 6.3V, 10%, 0402 |
| GRM188Z71A475KE15D | Murata | CAP., 4.7μF, X7R, 10V, 10%, 0603 |
| GRM31CR60J227ME11L | Murata | CAP., 220μF, X5R, 6.3V, 20%, 1206 |
| NFM18CC223R1C3D | Murata | CAP., FEED THRU 0.022μF, 20%, 16V, 1A 50mΩ 0603 |
| NFM21PC104R1E3D | Murata | CAP., FEED THRU 0.1μF, 20%, 25V, 2A, 30mΩ 805 |
| NFM31PC276B0J3L | Murata | CAP., 27μF, FEED THRU, 6.3V, 20%, 1206, 3-TERM |
| ERJ3GEYJ154V | Panasonic | RES., 150kΩ, 5%, 1/10W, 0603, AEC-Q200 |
| MCR01MZPJ000 | Rohm | RES., 0Ω, 5%, 1/16W, 0402 |
| 2SN-BK-G | Samtec | CONN., SHUNT, FEMALE, 2-POS, 2mm |
| TMM-103-02-L-S | Samtec | CONN., HDR, MALE, 1 × 3, 2mm, VERT, ST, THT |
| 35HVH220M+P | Sun Electronic Industries | CAP., 220μF, ALUM HYB, 35V, 20%, 10mm ×12.5mm, RADIAL |
| C1608X7R1A225M080AC | TDK | CAP., 2.2μF, X7R, 10V, 20%, 0603 |
| YFF31HC2A104MT000N | TDK | CAP., FEED THRU 0.1μF, 20%, 100V, 10A, 1.5mΩ 1206 |
| TMK107B7105KA-T | Taiyo Yuden | CAP., 1μF, X7R, 25V, 10%, 0603 |
| CRCW06030000Z0EA | Vishay | RES., 0Ω, 1/10W, 0603, AEC-Q200 |
| CRCW060310K0FKEA | Vishay | RES., 10kΩ, 1%, 1/10W, 0603, AEC-Q200 |
| CRCW06032K21FKEA | Vishay | RES., 2.21kΩ, 1%, 1/10W, 0603 |
| SUD50N04-8M8P-4GE3 | Vishay | XSTR., MOSFET, N-CH, 40V, 14A, DPAK (TO-252) |
| WSL25125L000FEA | Vishay | RES., 0.005Ω, 1%, 1W, 2512, METAL, SENSE |
| RC0603JR-0715KL | Yageo | RES., 15kΩ, 5%, 1/10W, 0603 |
| 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 |