General Description

The LP3204 is a constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.5V to 5.5V input voltage range makes the LP3204 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and handy-terminals.

Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. The internal synchronous switch increases efficiency while eliminate the need for an external Schottky diode.The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small SOT-23-5 package provide small PCB area application. Other features include soft start, lower internal reference voltage with 2 accuracy, over temperature protection, and over current protection.

特性 Features

? High Efficiency: 96

? 1.5MHz Fixed-Frequency PWM Operation

? Adjustable Output From 0.6V to VIN

? 800mA Output Current, 1.1A Peak Current

? No Schottky Diode Required

? 100 Duty Cycle Low Dropout Operation

? Available in SOT23-5 Package

? Short Circuit and Thermal Protection

? Over Voltage Protection

? Low than 1μA Shutdown Current

Applications

◇ Portable Media Players/MP3 players

◇ Cellular and Smart mobile phone

◇ PDA

◇ DSC

◇ Wireless Card