LM5009

更新时间： 2024-11-26 05:42:23

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
16页	332K
描述
150 mA, 100V Step-Down Switching Regulator

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LM5009 数据手册

February 5, 2008

LM5009

150 mA, 100V Step-Down Switching Regulator

General Description

Features

The LM5009 Step Down Switching Regulator features all of

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

bias regulator. This device is capable of driving a 150 mA load

current from a 9.5V to 95V input source. The switching fre-

quency can exceed 600 kHz, depending on the input and

output voltages. The output voltage may be set from 2.5V to

85V. This high voltage regulator contains an N-Channel buck

switch and internal startup regulator. The device is easy to

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

enhanced LLP-8 packages. The LM5009 is a well suited al-

ternative to a high voltage monolithic or discrete linear solu-

tion where the power loss becomes unacceptable. The

regulator’s operation is based on a hysteretic control scheme

using an ON time inversely proportional to VIN. This feature

allows the operating frequency to remain relatively constant

over load and input voltage variations. The hysteretic control

requires no loop compensation, resulting in an ultra-fast tran-

sient response. An intelligent current limit is implemented with

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

scheme ensures short circuit protection while providing min-

imum foldback. Other features include: Thermal Shutdown,

Vcc under-voltage lockout, Gate drive under-voltage lockout,

and Maximum Duty Cycle limiter.

Integrated N-Channel MOSFET

■

Guaranteed 150 mA output current capability

Ultra-Fast Transient Response

■

No loop compensation required

Vin feed forward provides constant operating frequency

Switching frequency can exceed 600 kHz

Highly efficient operation

2% accurate 2.5V feedback from -40°C to 125°C

Internal startup regulator

Intelligent current limit protection

External shutdown control

Thermal shutdown

MSOP-8 and thermally enhanced LLP packages

Typical Applications

Heat sink eliminator for classic linear regulator

applications

■

12V, 24V, 36V, and 48V rectified AC systems

■

42V Automotive

Non-isolated AC mains charge coupled supplies

LED Current Source

Package

MSOP - 8

■

LLP - 8 (4mm x 4mm)

Typical Application Circuit

20165828

Basic Stepdown Regulator

201658

www.national.com

12 3 4 5 6 7...16

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与LM5009相关器件

型号	品牌	获取价格	描述	数据表
LM5009_08	NSC	获取价格	150 mA, 100V Step-Down Switching Regulator
LM5009_14	TI	获取价格	150-mA 100-V Step-Down Switching Regulator
LM5009_15	TI	获取价格	Wide Input, 100-V,150-mA, Step-Down Switching Regulator
LM5009A	NSC	获取价格	100V, 150 mA Constant On-Time Buck Switching Regulator
LM5009A	TI	获取价格	6V 至 95V 宽输入电压、150mA 恒定导通时间非同步降压稳压器
LM5009AMM	NSC	获取价格	100V, 150 mA Constant On-Time Buck Switching Regulator
LM5009AMM/NOPB	TI	获取价格	6-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125
LM5009AMMX	NSC	获取价格	100V, 150 mA Constant On-Time Buck Switching Regulator
LM5009AMMX/NOPB	TI	获取价格	6-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator 8-VSSOP -40 to 125
LM5009ASD	NSC	获取价格	100V, 150 mA Constant On-Time Buck Switching Regulator

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