LR8401 datasheet(1/10 Pages) LRC

Part #	LR8401

Description	Synchronous Step-Up DC/DC

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	LRC [Leshan Radio Company]

Direct Link	http://www.lrc.cn/

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Synchronous Step-Up DC/DC Converter with PFM Control

CE8401 Series

Synchronous Step-Up DC/DC

Converter with PFM Control

LR8401 Series

 INTRODUCTION

The LR8 401 Series is a Synchronous

step-up DC/DC Converter with PFM Control.

With the LR8 401 Series, a step-up

switching DC/DC converter can be configured

by using an external coil, capacitor. The

built-in MOSFET is turned off by a protection

circuit when the voltage at the LX pin exceeds

the limit to prevent it from being damaged.

 FEATURES



External parts: Coil, capacitor



Output voltage: Settable to between 2.1V

to 5.5 V in 0.1 V steps



Maximum Oscillation frequency:300KHz



Accuracy of ±2%



High efficiency：95%



APPLICATIONS



Digital cameras



Electronic notebooks and PDAs



Portable CD/MD players



Cameras, video equipment,



Communications equipment



Power supply for microcomputers

 BLOCK DIAGRAM

 ORDER INFORMATION

LX

EN

VOUT

VSS

Current

Limiting

comparator

buffer

PFM

control

OSC

Chip

Enable

ref

Error

Amplifier

DESIGNATOR

SYMBOL

DESCRIPTION

①

A

Standard LX

B

With shutdown, LX

②③

Integer

Output Voltage

（2.1～5.5）

e.g.：3.0V=②:3; ③:0

④

M

Package：SOT-23-3/5

MB

Package：SOT-23

P

Package：SOT-89

T

Package：TO92

LR8401①②③④

LESHAN RADIO COMPANY, LTD.

1/10

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