LTC3440
Linear Technology
Demonstration Circuit 425B is a constant-frequency synchronous Buck-Boost converter using the LTC3440.
Design DocumentAnalog
LTC3440 Demonstration Circuit 425B Quick Start Guide
Quick start guide for the DC425B demo circuit featuring the LTC3440 1MHz synchronous buck-boost converter. Supports 2.5V-5.5V input and provides 3.3V output at up to 500mA.
Overview
This design document provides technical specifications and setup instructions for Demonstration Circuit 425B, which features the LTC3440 constant-frequency synchronous buck-boost converter. The circuit operates over an input voltage range of 2.5V to 5.5V, making it suitable for single-cell lithium-ion or three-cell NiCd/NiMH battery applications. It is configured for a 3.3V output and can deliver up to 500mA of load current at minimum input voltage with efficiency reaching 95%. The default 1MHz switching frequency is adjustable and can be synchronized to an external clock. The guide includes performance summaries, connection diagrams, and efficiency curves.
Use Cases
- Single-cell lithium-ion battery applications
- Three-cell NiCd/NiMH battery applications
- Handheld electronic devices
- Portable medical equipment
- Battery-operated sensors
Topics
LTC3440
DC425B
synchronous buck-boost
DC/DC converter
Analog Devices
Linear Technology
power management
1MHz converter
battery powered
Referenced Parts
| LTC3440 | Linear Technology | Demonstration Circuit 425B is a constant-frequency synchronous Buck-Boost converter using the LTC3440. |