Datasheet > LMR24220

LMR24220

更新时间： 2024-11-26 11:37:27

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
18页	2001K
描述
SIMPLE SWITCHER? 42Vin, 2.0A Step-Down Voltage Regulator in micro SMD

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LMR24220 数据手册

October 5, 2011

LMR24220

SIMPLE SWITCHER® 42Vin, 2.0A Step-Down Voltage

Regulator in micro SMD

Features

System Performance

Input voltage range of 4.5V to 42V

■

Efficiency vs Load Current

Output voltage range of 0.8V to 24V

(V_OUT= 3.3V)

Output current up to 2.0A

100

Integrated low R_DS(ON)synchronous MOSFETs for high

efficiency

Up to 1 MHz switching frequency

■

Low shutdown Iq, 25 µA typical

Programmable soft-start

No loop compensation required

COT architecture with ERM

28 bump micro SMD (2.45 x 3.64 x 0.60 mm) packaging

Fully enabled for WEBENCH®™ Power Designer

VIN = 4.5V

VIN = 9V

VIN = 12V

VIN = 24V

VIN = 42V

Performance Benefits

Tiny overall solution reduces system cost

■

0.0

0.4

0.8

1.2

1.6

2.0

Integrated synchronous MOSFETs provides high

efficiency at low output voltages

LOAD CURRENT (A)

COT with ERM architecture requires no loop

compensation, reduces component count, and provides

ultra fast transient response

■

30167670

V_OUTRegulation vs Load Current

(V_OUT= 3.3V)

Stable with low ESR capacitors

■

0.8

Applications

0.6

0.4

VIN = 4.5V

VIN = 9V

Point-of-Load Conversions from 5V, 12V and 24V Rails

■

VIN = 12V

VIN = 24V

VIN = 42V

Space Constrained Applications

0.2

Industrial Distributed Power Applications

Power Meters

0.0

■

-0.2

-0.4

-0.6

-0.8

0.0

0.4

0.8

1.2

1.6

2.0

LOAD CURRENT (A)

30167671

SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation

301676

www.national.com

12 3 4 5 6 7...18

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