Linear Technology DC480 High Efficiency Synchronous Buck Regulator Quick Start Guide

About this manual

This guide explains how to set up and operate the DC480 demo board, which uses the LTC3405A synchronous buck regulator. It covers connecting input and output power, selecting operating modes via jumpers, and shutdown procedures. The board is designed for battery-powered, handheld applications with low power consumption and small size.

The DC480 supports input voltages from 2.5V to 5.5V and delivers up to 300mA at 3.0V. It operates in Burst Mode™ for ultra-low supply current (25µA no load, <1µA shutdown) and uses a 1.5MHz switching frequency for compact component layout.

What's inside

• Quick Start
• Input Power Connection
• Output Load Connection
• Operating Mode Selection
• Shutdown Procedure

Specifications

Frequently asked questions

What is the input voltage range for the DC480?

The input voltage range is 2.5V to 5.5V.

How much output current can the DC480 deliver?

It can deliver up to 300mA of output current.

How do I select Burst Mode™ operation?

Connect the MODE pin to ground by inserting the jumper into the upper position on JP1.

How do I shut down the circuit?

Connect the RUN pin to ground by inserting the JP2 jumper into the upper position.