LTC3370 Demonstration Circuit 2311A: 4-Channel 8A Configurable Buck DC/DC Regulators
Demonstration circuit for the LTC3370, a 4-channel configurable buck regulator system providing up to 8A total output from a 2.25V to 5.5V input range.
Overview
The DC2311A demonstration manual provides technical details for evaluating the LTC3370, a flexible 4-channel synchronous buck regulator. The LTC3370 integrates eight 1A power stages that can be configured into eight combinations of 1A, 2A, 3A, and 4A outputs. The DC2311A board is factory-configured as four 2A buck regulators with default outputs of 1.2V, 2.5V, 1.8V, and 3.3V. It supports an input voltage range of 2.25V to 5.5V, making it suitable for single-cell Li-Ion battery applications. The document outlines procedures for modifying the board's configuration, adjusting the operating frequency between 1MHz and 3MHz, and utilizing features such as Burst Mode, Forced Continuous Mode, and PLL synchronization.
Use Cases
- Single-cell Li-Ion/Polymer battery power systems
- Microprocessor and FPGA core power supplies
- Multichannel power management in portable devices
- High-efficiency industrial step-down regulation
Topics
Referenced Parts
8832
Keystone
STAND-OFF NYLON, 0.375" TALL (SNAP-ON)
LTC3370EUH#PBF
Linear Technology
4-CHANNEL 8A CONFIGURABLE BUCK DC-DCs,TSSOP
2SN-KB-G
Samtec
SHUNT, 2mm
JMK212BJ476MG
Taiyo Yuden
CAP, CHIP, X5R, 47μF, ±20%, 6.3V, 0805
FDSD0518-2R2
Toko
(TOKO-FDSD0518-2R2)
2mm
Samtec
29 1 JP5 2mm to HEADER 1 × 4 , 2mm SAMTEC, TMM-104-02-L-S
2mm
Samtec
30 6 JP1–JP6 SHUNT, 2mm SAMTEC, 2SN-KB-G
2mm
Samtec
28 5 JP1–JP4, JP6 2mm to HEADER 1 × 3 , 2mm SAMTEC, TMM-103-02-L-S
| 04025A100JAT2A | AVX | CAP, CHIP, NPO, 10pF, ±5%, 50V, 0402 |
| XAL4020-222MEC | Coilcraft | IND, SMT, 2.2μH, 38mΩ, ±20%, 5.5A, 4mm × 4mm |
| SML-LX0603SRW-TR | Lumex | DIODE, LED, SUPER RED DIFF, 0603 SMD |
| 2308-2-00-80-00-00-07-0 | Mill-Max | TURRET, 0.061 DIA |
| 2501-2-00-80-00-00-07-0 | Mill-Max | TURRET, 0.09 DIA |
| 6TPC47M | Panasonic | CAP, POSCAP, 47μF, ±20%, 6.3V, SMT |
| 6TPG100MG | Panasonic | CAP, POSCAP, 100μF, ±20%, 6.3V, SMT |
| TMM-103-02-L-S | Samtec | 2mm to HEADER 1 × 3 , 2mm |
| TMM-104-02-L-S | Samtec | 2mm to HEADER 1 × 4 , 2mm |
| C1608X5R0J106M | TDK | CAP, CHIP, X5R, 10μF, ±20%, 6.3V, 0603 |
| JMK212BJ226MG-T | Taiyo Yuden | CAP, CHIP, X5R, 22μF, ±20%, 6.3V, 0805 |
| CRCW04021K00JNED | Vishay | RES, CHIP, 1kΩ, ±5%, 1/16W, 0402 |
| CRCW04021M00JNED | Vishay | RES, CHIP, 1.00MΩ, ±5%, 1/16W, 0402 |
| CRCW040220R0FKED | Vishay | RES, CHIP, 20Ω , ±1%, 1/16W, 0402 |
| CRCW06030000Z0EA | Vishay | RES, CHIP, 0Ω JUMPER, 1/10W, 0603 |
| CRCW0603162KFKEA | Vishay | RES, CHIP,162kΩ, ±1%, 1/10W, 0603 |
| CRCW0603232KFKEA | Vishay | RES, CHIP, 232kΩ, ±1%, 1/10W, 0603 |
| CRCW0603309KFKEA | Vishay | RES, CHIP, 309kΩ, ±1%, 1/10W, 0603 |
| CRCW0603402KFKEA | Vishay | RES, CHIP,402kΩ, ±1%, 1/10W, 0603 |
| CRCW0603464KFKEA | Vishay | RES, CHIP, 464kΩ, ±1%, 1/10W, 0603 |
| CRCW0603511KFKEA | Vishay | RES, CHIP, 511kΩ, ±1%, 1/10W, 0603 |
| CRCW0603649KFKEA | Vishay | RES, CHIP, 649kΩ, ±1%, 1/10W, 0603 |
| CRCW0603665KFKEA | Vishay | RES, CHIP,665kΩ, ±1%, 1/10W, 0603 |
| CRCW0603806KFKEA | Vishay | RES, CHIP, 806kΩ, ±1%, 1/10W, 0603 |
| 8832 | Keystone | STAND-OFF NYLON, 0.375" TALL (SNAP-ON) |
| LTC3370EUH#PBF | Linear Technology | 4-CHANNEL 8A CONFIGURABLE BUCK DC-DCs,TSSOP |
| 2SN-KB-G | Samtec | SHUNT, 2mm |
| JMK212BJ476MG | Taiyo Yuden | CAP, CHIP, X5R, 47μF, ±20%, 6.3V, 0805 |
| FDSD0518-2R2 | Toko | (TOKO-FDSD0518-2R2) |
| 2mm | Samtec | 29 1 JP5 2mm to HEADER 1 × 4 , 2mm SAMTEC, TMM-104-02-L-S |
| 2mm | Samtec | 30 6 JP1–JP6 SHUNT, 2mm SAMTEC, 2SN-KB-G |
| 2mm | Samtec | 28 5 JP1–JP4, JP6 2mm to HEADER 1 × 3 , 2mm SAMTEC, TMM-103-02-L-S |