GENERAL DESCRIPTION

The ADP3025 is a highly efficient, dual synchronous buck switching regulator controller optimized for converting a battery or adapter input into the supply voltage required in portable products and industrial systems. The oscillator frequency can be programmed for 200 kHz or 300 kHz operation, or can be synchronized to an external clock signal of up to 350 kHz.

FEATURES

Wide input voltage range: 5.5 V to 25 V

High conversion efficiency > 96

Integrated current sense—no external resistor required

Low shutdown current: 19 µA (typical)

Voltage mode PWM with input feed-forward for fast line

transient response

Dual synchronous buck controllers

Built-in gate drive boost circuit for driving external high-side

N-channel MOSFET

2 independently programmable output voltages:

Fixed 3.3 V or adjustable (800 mV to 6.0 V)

Fixed 5 V or adjustable (800 mV to 6.0 V)

Programmable PWM frequency

Integrated linear regulator controller

Extensive circuit protection functions

APPLICATIONS

Portable instruments

General-purpose dc-to-dc converters