Preliminary Datasheet

LP3205

LP3205 – Ver. 1.0 Datasheet

Feb.-2007

Page 1 of 10

1.5MHZ,800mA,High Efficiency Synchronous

PWM Step-Down DC/DC Convert

General Description

The LP3205 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 LP3205 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。

Ordering Information

LP3205 -

□ □ □ □

□

F: Pb-Free

Package Type

B5: SOT23-5

J5: SOT23-5

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, 3.0Vand 3.3V Fixed

◆ 800mA Output Current, 1.1A Peak Current

◆ No Schottky Diode Required

◆ 95% Duty Cycle Low Dropout Operation

◆ Available in SOT23-5/TSOT23-5 Package 　

◆ Short Circuit and Thermal Protection 　

◆ Low than 1µA Shutdown Current

Applications

Portable Media Players

Cellular and Smart mobile phone

PDA

DSC

Wireless Card

Pin Configurations

Marking Information

Please see website.