Preliminary Datasheet

LP3203

LP3203 – Ver. 1.0 Datasheet

Dec.-2006

Page 1 of 10

1.5MHZ,600mA,High Efficiency Synchronous

PWM Step-Down DC/DC Convert

General Description

The LP3203 is a constant frequency, current mode,

PWM step-down converter. The device integrates a

main switch and a synchronous rectifier for high

efficiency. The 2.1V to 5.5V input voltage range makes

the LP3203 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

TSOT-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。

Ordering Information

LP3203 -

□ □ □ □

□

F: Pb-Free

Package Type

J5: TSOT23-5

Output Voltage Type

A:

Adjustable type

12:

1.2V

15:

1.5V

18:

1.8V

25:

2.5V

33:

3.3V

Features

◆ High Efficiency: 93% 　

◆ 1.5MHz Fixed-Frequency PWM Operation

◆ Adjustable Output From 0.6V to VIN 　

◆ 1.2V, 1.5V, 1.8V, 2.5V, 2.8V and 3.3V Fixed

◆ 600mA Output Current, 1.1A Peak Current

◆ No Schottky Diode Required

◆ 100% Duty Cycle Low Dropout Operation

◆ Available in TSOT23-5 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

Pin Configurations

Marking Information

Please see website.