LM5008

更新时间： 2024-11-28 22:31:11

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器开关
页数	文件大小	规格书
15页	276K
描述
High Voltage (100V) Step Down Switching Regulator

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LM5008 数据手册

October 2004

LM5008

High Voltage (100V) Step Down Switching Regulator

General Description

Features

n Integrated 100V, N-Channel buck switch

n Internal V_CCregulator

The LM5008 Step Down Switching Regulator features all of

the functions needed to implement a low cost, efficient, Buck

bias regulator. This high voltage regulator contains an 100 V

N-Channel Buck Switch. The device is easy to implement

and is provided in the MSOP-8 and the thermally enhanced

LLP-8 packages. The regulator is based on a hysteretic

control scheme using an ON time inversely proportional to

V_IN. This feature allows the operating frequency to remain

relatively constant. The hysteretic control requires no loop

compensation. An intelligent current limit is implemented

with forced OFF time, which is inversely proportional to Vout.

This scheme ensures short circuit protection while providing

minimum foldback. Other protection features include: Ther-

mal Shutdown, V_CCunder-voltage lockout, Gate drive under-

voltage lockout, and Max Duty Cycle limiter

n No loop compensation required

n Ultra-Fast transient response

n On time varies inversely with line voltage

n Operating frequency remains constant with varying line

voltage and load current

n Adjustable output voltage

n Highly efficient operation

n Precision internal reference

n Low bias current

n Intelligent current limit protection

n Thermal shutdown

Typical Applications

n Non-Isolated Telecommunication Buck Regulator

n Secondary High Voltage Post Regulator

n +42V Automotive Systems

Package

n MSOP - 8

n LLP - 8 (4mm x 4mm)

Connection Diagram

20097902

8-Lead MSOP, LLP

Ordering Information

Order Number

LM5008MM

LM5008SD

Package Type

NSC Package Drawing

Supplied As

MSOP-8

LLP-8

MUA08A

SDC08A

1000 Units on Tape and Reel

DS200979

www.national.com

12 3 4 5 6 7...15

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与LM5008相关器件

型号	品牌	获取价格	描述	数据表
LM5008_09	NSC	获取价格	High Voltage (100V) Step Down Switching Regulator
LM5008A	NSC	获取价格	100V, 350 mA Constant On-Time Buck Switching Regulator
LM5008A	TI	获取价格	100-V 350-mA Constant On-Time Buck Switching Regulator
LM5008A_14	TI	获取价格	350 mA Constant On-Time Buck Switching Regulator
LM5008AMM	NSC	获取价格	100V, 350 mA Constant On-Time Buck Switching Regulator
LM5008AMM/NOPB	TI	获取价格	100-V 350-mA Constant On-Time Buck Switching Regulator
LM5008AMMX	NSC	获取价格	100V, 350 mA Constant On-Time Buck Switching Regulator
LM5008AMMX/NOPB	TI	获取价格	100-V 350-mA Constant On-Time Buck Switching Regulator
LM5008ASD	NSC	获取价格	100V, 350 mA Constant On-Time Buck Switching Regulator
LM5008ASD/NOPB	TI	获取价格	100-V 350-mA Constant On-Time Buck Switching Regulator