UNISONIC TECHNOLOGIES CO., LTD

L3380

CMOS IC

www.unisonic.com.tw

1 of 9

Copyright © 2006 Unisonic Technologies Co., Ltd

QW-R502-099,A

PWM STEP UP DC-DC

CONTROLLER

DESCRIPTION

The L3380 is PWM step up DC-DC switching controller that

operates from 0.9V. The low start up input voltage makes L3380

specially designed for powering portable equipment from one or two

cells battery packs. This device consist of a soft start circuit, a

reference voltage source, an error amplifier, an oscillator, a phase

compensation, a PWM controller and an output drive circuit for

driving external power transistor.

Additionally, a chip enable feature is provided to power down the

converter for extended battery life. The device features a voltage

mode PWM control loop, providing stable and high efficiency

operation over a broad load current range.

FEATURES

* 0.9V low start-up Input voltage at 1mA load

* Low operation current

* 0.5uA low shutdown current

* Fix frequency PWM at 100KHZ

* Built in PWM switching control circuit ,duty ratio is 0~83%

* Output voltage:0.1V step setting is available between 2.0V and

6.5V

* Soft start time: 6ms

* Shutdown function

APPLICATIONS

*Portable devices

*Electronic games

*Portable audio (MP3)

*Personal digital assistant (PDA)

*Digital still cameras(DSC)

*Camcorders

*White LED driver

*Single and dual-cell battery operated products

SOT-25

4

5

3

2

1

*Pb-free plating product number: L3380L

ORDERING INFORMATION

Order Number

Normal

Lead Free Plating

Package

Packing

L3380-xx-AF5-R

L3380L-xx-AF5-R

SOT-25

Tape Reel

L3380L-xx-AF5-R

(1)Packing Type

(2)Package Type

(3)Output Voltage Code

(4)Lead Plating

(1) R: Tape Reel

(2) AF5: SOT-25

(3) xx: refer to Marking Information

(4) L: Lead Free Plating, Blank: Pb/Sn