Datasheet > LM2746

LM2746

更新时间： 2024-11-24 21:55:23

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器控制器
页数	文件大小	规格书
24页	1081K
描述
Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller

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LM2746 数据手册

May 2005

LM2746

Low Voltage N-Channel MOSFET Synchronous Buck

Regulator Controller

General Description

Features

n Power stage input voltage from 1V to 16V

n Control stage input voltage from 3V to 5.5V

n Output voltage adjustable down to 0.6V

n Power good flag and shutdown

The LM2746 is a high-speed synchronous buck regulator

controller with a feedback voltage accuracy of 1%. It can

provide simple down conversion to output voltages as low as

0.6V. Though the control sections of the IC are rated for 3 to

5.5V, the driver sections are designed to accept input supply

rails as high as 16V. The use of non-overlapping MOSFET

gate drivers helps avoid potential shoot-through problems

while maintaining high efficiency. The IC is designed for the

more cost-effective option of driving only N-channel MOS-

FETs in both the high-side and low-side positions. It senses

the low-side switch voltage drop for providing a simple,

adjustable current limit.

n Output overvoltage and undervoltage detection

1% feedback voltage accuracy over temperature

n Low-side adjustable current sensing

n Adjustable soft-start

n Tracking and sequencing with shutdown and soft start

pins

n Switching frequency from 50 kHz to 1 MHz

n Exposed pad TSSOP-14 package

The fixed-frequency voltage-mode PWM control architecture

is adjustable from 50 kHz to 1 MHz with one external resis-

tor. This wide range of switching frequency gives the power

supply designer the flexibility to make better tradeoffs be-

tween component size, cost and efficiency.

Applications

n Cable Modem, DSL and ADSL

n Laser Jet and Ink Jet Printers

n Low Voltage Power Modules

n DSP, ASIC, Core and I/O

Features include soft-start, input undervoltage lockout

(UVLO) and Power Good (based on both undervoltage and

overvoltage detection). In addition, the shutdown pin of the

IC can be used for providing startup delay, and the soft-start

pin can be used for implementing precise tracking, for the

purpose of sequencing with respect to an external rail.

Typical Application

20147701

DS201477

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与LM2746相关器件

型号	品牌	获取价格	描述	数据表
LM2746MXA	NSC	获取价格	Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXA/NOPB	TI	获取价格	IC,SMPS CONTROLLER,VOLTAGE-MODE,TSSOP,14PIN,PLASTIC
LM2746MXAX	NSC	获取价格	Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2747	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2747	TI	获取价格	Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization
LM2747_15	TI	获取价格	Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization
LM2747MTC	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2747MTC/NOPB	TI	获取价格	Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization
LM2747MTCX	NSC	获取价格	Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
LM2747MTCX/NOPB	TI	获取价格	Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock Synchronization

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