LM5574

更新时间： 2024-11-30 04:18:19

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
22页	403K
描述
75V, 0.5A Step-Down Switching Regulator

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LM5574 数据手册

January 2007

LM5574

75V, 0.5A Step-Down Switching Regulator

General Description

Features

The LM5574 is an easy to use SIMPLE SWITCHER® buck

regulator which allows design engineers to design and opti-

mize a robust power supply using a minimum set of compo-

nents. Operating with an input voltage range of 6 - 75V, the

LM5574 delivers 0.5A of continuous output current with an

integrated 750mΩ N-Channel MOSFET. The regulator uti-

lizes an Emulated Current Mode architecture which provides

inherent line regulation, tight load transient response, and

ease of loop compensation without the usual limitation of low-

duty cycles associated with current mode regulators. The

operating frequency is adjustable from 50kHz to 500kHz to

allow optimization of size and efficiency. To reduce EMI, a

frequency synchronization pin allows multiple IC’s from the

LM(2)557x family to self-synchronize or to synchronize to an

external clock. The LM5574 guarantees robustness with cy-

cle-by-cycle current limit, short-circuit protection, thermal

shut-down, and remote shut-down. The device is available in

a TSSOP-16 package. The LM5574 is supported by the full

suite of WEBENCH^®On-Line design tools.

Integrated 75V, 750mΩ N-channel MOSFET

Ultra-wide input voltage range from 6V to 75V

Adjustable output voltage as low as 1.225V

1.5% feedback reference accuracy

■

Operating frequency adjustable between 50kHz and

500kHz with single resistor

Master or slave frequency synchronization

Adjustable soft-start

■

Emulated current mode control architecture

Wide bandwidth error amplifier

Built-in protection

Package

TSSOP-16

■

Simplified Application Schematic

20212001

WEBENCH^®is a registered trademark of National Semiconductor Corporation.

202120

www.national.com

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与LM5574相关器件

型号	品牌	获取价格	描述	数据表
LM5574_09	NSC	获取价格	SIMPLE SWITCHER 75V, 0.5A Step-Down Switching Regulator
LM5574MT	NSC	获取价格	75V, 0.5A Step-Down Switching Regulator
LM5574MT	TI	获取价格	LM5574/LM5574-Q1 SIMPLE SWITCHERÂ® 75V, 0.5A
LM5574MT/NOPB	TI	获取价格	75V、0.5A 降压开关稳压器 \| PW \| 16 \| -40 to 125
LM5574MTX	TI	获取价格	LM5574/LM5574-Q1 SIMPLE SWITCHERÂ® 75V, 0.5A
LM5574MTX	NSC	获取价格	75V, 0.5A Step-Down Switching Regulator
LM5574MTX/NOPB	TI	获取价格	75V、0.5A 降压开关稳压器 \| PW \| 16 \| -40 to 125
LM5574Q0MT	TI	获取价格	LM5574/LM5574-Q1 SIMPLE SWITCHERÂ® 75V, 0.5A
LM5574Q0MT/NOPB	TI	获取价格	75V、0.5A 降压开关稳压器 \| PW \| 16
LM5574Q0MTX	TI	获取价格	LM5574/LM5574-Q1 SIMPLE SWITCHERÂ® 75V, 0.5A