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LR8301 PDF预览

LR8301

更新时间: 2024-11-16 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

LR8301 数据手册

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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. (IOUT = 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 CD)  
• External transistor type available  
(product type BD)  
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  
1/9  

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