Datasheet > LM3151

LM3151

更新时间： 2024-11-25 05:42:03

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
20页	471K
描述
SIMPLE SWITCHER® CONTROLLER, High Input Voltage Synchronous Step-Down

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LM3151 数据手册

August 26, 2009

LM3151/LM3152/LM3153

SIMPLE SWITCHER^®CONTROLLER, High Input Voltage

Synchronous Step-Down

General Description

Features

The LM3151/2/3 SIMPLE SWITCHER^®Controller is an easy

to use and simplified step down power controller capable of

providing up to 12A of output current in a typical application.

Operating with an input voltage range from 6V-42V, the

LM3151/2/3 features a fixed output voltage of 3.3V, and fea-

tures switching frequencies of 250 kHz, 500 kHz, and 750

kHz. The synchronous architecture provides for highly effi-

cient designs. The LM3151/2/3 controller employs a Constant

On-Time (COT) architecture with a proprietary Emulated Rip-

ple Mode (ERM) control that allows for the use of low ESR

output capacitors, which reduces overall solution size and

output voltage ripple. The Constant On-Time (COT) regula-

tion architecture allows for fast transient response and re-

quires no loop compensation, which reduces external com-

ponent count and reduces design complexity.

PowerWise^®step-down controller

■

6V to 42V Wide input voltage range

Fixed output voltage of 3.3V

Fixed switching frequencies of 250 kHz/500 kHz/750 kHz

No loop compensation required

Fully WEBENCH^®enabled

Low external component count

Constant On-Time control

Ultra-Fast transient response

Stable with low ESR capacitors

Output voltage pre-bias startup

Valley current limit

Programmable soft-start

■

Fault protection features such as thermal shutdown, under-

voltage lockout, over-voltage protection, short-circuit protec-

tion, current limit, and output voltage pre-bias startup allow for

a reliable and robust solution.

The LM3151/2/3 SIMPLE SWITCHER^®concept provides for

an easy to use complete design using a minimum number of

external components and National’s WEBENCH^®online de-

sign tool. WEBENCH^®provides design support for every step

of the design process and includes features such as external

component calculation with a new MOSFET selector, electri-

cal simulation, thermal simulation, and Build-It boards for

prototyping.

Typical Applications

Telecom

■

Networking Equipment

Routers

Security Surveillance

Power Modules

■

Typical Application

30053201

SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation

300532

www.national.com

12 3 4 5 6 7...20

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与LM3151相关器件

型号	品牌	获取价格	描述	数据表
LM3151_14	TI	获取价格	SIMPLE SWITCHERÂ® CONTROLLER, High Input Volt
LM3151MH-2.5	NSC	获取价格	IC SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14, TSSOP-14, Switching Regulator
LM3151MH-3.3	NSC	获取价格	SIMPLE SWITCHER® CONTROLLER, High Input Volta
LM3151MH-3.3/NOPB	TI	获取价格	LM3151/LM3152/LM3153 SIMPLE SWITCHERÂ® CONTRO
LM3151MH-5.0	NSC	获取价格	IC SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14, TSSOP-14, Switching Regulator
LM3151MHE-2.5	NSC	获取价格	IC SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14, TSSOP-14, Switching Regulator
LM3151MHE-3.3	NSC	获取价格	SIMPLE SWITCHER® CONTROLLER, High Input Volta
LM3151MHE-3.3/NOPB	TI	获取价格	LM3151/LM3152/LM3153 SIMPLE SWITCHERÂ® CONTRO
LM3151MHE-5.0	NSC	获取价格	IC SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14, TSSOP-14, Switching Regulator
LM3151MHX-2.5	NSC	获取价格	IC SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14, TSSOP-14, Switching Regulator

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