LTC3408EDD
Linear Technology
Demonstration circuit DC645 is a constant-frequency step-down converter, using the LTC3408EDD monolithic synchronous buck regulator.
Design DocumentAnalog
LTC3408EDD Demonstration Circuit DC645 User Guide
User guide for the DC645 demonstration circuit featuring the LTC3408EDD, a 600mA buck regulator designed for WCDMA power amplifier applications.
Overview
The DC645 demonstration circuit evaluates the LTC3408EDD, a constant-frequency monolithic synchronous buck regulator. Optimized for WCDMA cellular phone power amplifier applications, it operates from an input range of 2.7V to 5.5V and provides a dynamically controlled output voltage from 0.3V to 3.5V. The circuit includes an internal 80mΩ bypass P-channel MOSFET to reduce power loss and achieves up to 96% efficiency. Operating at a frequency of 1.5MHz, the design utilizes low-profile surface mount components and supports output currents up to 600mA.
Use Cases
- WCDMA cellular phone power amplifiers
- Single-cell Li-ion powered handheld applications
- Dynamic voltage scaling for portable electronics
- Low-profile power management modules
Topics
LTC3408EDD
DC645
Linear Technology
synchronous buck regulator
WCDMA power amplifier
step-down converter
PowerPath
dynamic voltage control
Referenced Parts
| LTC3408EDD | Linear Technology | Demonstration circuit DC645 is a constant-frequency step-down converter, using the LTC3408EDD monolithic synchronous buck regulator. |