Datasheet > LR8301

LR8301

更新时间： 2024-10-29 12:26:39

品牌	Logo	应用领域
乐山 - LRC		转换器
页数	文件大小	规格书
9页	426K
描述
SMALL PACKAGE PFM CONTROL STEP-UP DC/DC CONVERTER

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LR8301 数据手册

LESHAN RADIO COMPANY, LTD.

SMALL PACKAGE PFM CONTROL

STEP-UP DC/DC CONVERTER

LR8301 Series

Introduction

Features

The LR8301 Series is a CMOS PFM-control

step-up switching DC/DC converter that

mainly consists of a reference voltage

source, an oscillator, and a comparator. The

PFM controller allows the duty ratio to be

automatically switched according to the load

(light load: 50%, high output current: 75%),

enabling products with a low ripple over a

wide range, high efficiency, and high output

current. With the LR8301 Series, a step-up

switching DC/DC converter can be

configured by using an external coil,

capacitor, and diode. The built-in MOS FET is

turned off by a protection circuit when the

voltage at the LX pin exceeds the limit to

prevent it from being damaged. This feature,

along with the mini package and low current

consumption, makes the LR8301 Series

ideal for applications such as the power

supply unit of portable equipment.

• Low voltage operation: Startup at 0.9 V

min. (I_OUT= 1 mA) guaranteed

• Duty ratio: 66/78%, builtin auto switching

type PFM controller

• External parts: Coil, capacitor, diode

• Output voltage: Settable to between 1.8

to 6.5 V in 0.1 V steps

• Accuracy of ±2%

• High efficiency：±85%（typ.）

• Standard function (product type A)

• Shutdown function (product type C、D)

• External transistor type available

(product type B、D)

Ordering Information

Applications

• Power supply for portable equipment such

as digital cameras, electronic notebooks, and

PDAs

• Power supply for audio equipment such as

portable CD/MD players

• Constant voltage power supply for cameras,

video equipment, and communications

equipment

• Power supply for microcomputers

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