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Quick Start Guide for Demonstration Circuit 568: LTC3407 Dual Synchronous Step-Down DC/DC Regulator

Quick start guide for the DC568 demo board featuring the LTC3407 dual 600mA, 1.5MHz synchronous step-down regulator. Supports 2.5V-5.5V input with up to 96% efficiency.

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Overview

Demonstration circuit 568 is a dual-channel synchronous step-down DC/DC regulator evaluation board featuring the LTC3407. It supports an input voltage range from 2.5V to 5.5V and provides up to 600mA of output current per channel. The regulator operates at a fixed 1.5MHz switching frequency, facilitating the use of small, low-profile surface-mount components. The design allows users to select between Burst Mode operation for high efficiency at light loads (40uA quiescent current) and Pulse Skip mode for minimized output ripple. The documentation includes performance specifications, setup procedures for evaluation, a complete schematic, and a detailed bill of materials featuring parts from manufacturers such as Taiyo Yuden, AVX, and AAC.

Use Cases

  • Battery-powered handheld devices
  • Portable electronics
  • Dual rail voltage regulation
  • High-efficiency light-load power management

Topics

LTC3407
DC568
dual synchronous step-down
DC/DC regulator
600mA
1.5MHz
Burst Mode
Pulse Skip
Analog Devices
Linear Technology

Referenced Parts

CR05-1003FM

AAC

RES, 100K OHMS 1% 1/16W 0402 AAC CR05-1003FM

CR05-2803FM

AAC

RES, 280K OHMS 1% 1/16W 0402 AAC CR05-2803FM

CR05-3013FM

AAC

RES, 301K OHMS 1% 1/16W 0402 AAC CR05-3013FM

CR05-4023FM

AAC

RES, 402K OHMS 1% 1/16W 0402 AAC CR05-4023FM

CR05-475JM

AAC

RES, 4.7M OHMS 5% 1/16W 0402 AAC CR05-475JM

CR05-6043FM

AAC

RES, 604K OHMS 1% 1/16W 0402 AAC CR05-6043FM

CR05-8873FM

AAC

RES, 887K OHMS 1% 1/16W 0402 AAC CR05-8873FM

04025A100KAT

AVX

2 2 C2,C1 CAP, NPO 10pF 50V 10% 0402 AVX 04025A100KAT

TAJW476M010R

AVX

4 1 C5 CAP, TANT 47uF 10V 20% 6032 AVX TAJW476M010R

2202S-06G1

Comm Con

HEADER, 3X2 2mm COMM CON 2202S-06G1

2802S-03-G1

Comm Con

HEADER, 3P 2mm COMM CON 2802S-03-G1

LTC3407EMS

Linear Technology

IC, LTC3407EMS LINEAR TECH. LTC3407EMS

2501-2

Mill-Max

TURRETS MILL-MAX 2501-2

JMK212BJ106MG

Taiyo Yuden

CAP, X5R 10uF 6.3V 20% 0805 TAIYO YUDEN JMK212BJ106MG

LQLBC25182R2M

Taiyo Yuden

IND, 2.2uH TAIYO YUDEN LQLBC25182R2M

JMK212BJ106MG

Taiyo Yuden

1 3 COUT1,COUT2,CIN CAP, X5R 10uF 6.3V 20% 0805 TAIYO YUDEN JMK212BJ106MG

LQLBC25182R2M

Taiyo Yuden

8 2 L1,L2 IND, 2.2uH TAIYO YUDEN LQLBC25182R2M

2.2uH

Taiyo Yuden

8 2 L1,L2 IND, 2.2uH TAIYO YUDEN LQLBC25182R2M

Quick Start Guide for Demonstration Circuit 568: LTC3407 Dual Synchronous Step-Down DC/DC Regulator | Design Resources