General Description

The AS1332 is a step-down DC-DC converter designed to power radiofrequency (RF) power amplifiers (PAs) from a single Li-Ion battery. The device also achieves high-performance in mobile phones and similar RF PA applications.

Key Features

■ PWM Switching Frequency: 2MHz

■ Single Lithium-Ion Cell Operation (2.7V to 5.5V)

■ Dynamic Programmable Output Voltage (1.3V to 3.16V)

■ Maximum load capability of 650mA

■ High Efficiency (96 Typ at 3.6VIN, 3.16VOUT at 400mA) from internal synchronous rectification

■ Current Overload Protection

■ Thermal Overload Protection

■ Soft Start

■ 8-pin WL-CSP

Applications

The AS1332 is an ideal solution for cellular phones, hand-held radios, RF PC cards, and battery powered RF devices.