Datasheet > LM2655

LM2655

更新时间： 2024-11-23 00:01:07

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
17页	360K
描述
2.5A High Efficiency Synchronous Switching Regulator

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM2655 数据手册

February 2000

LM2655

2.5A High Efficiency Synchronous Switching Regulator

General Description

Features

n Ultra-high efficiency up to 96

The LM2655 is a current-mode controlled PWM step-down

switching regulator. It has the unique ability to operate in

synchronous or asynchronous mode. This gives the de-

signer flexibility to choose between the high efficiency of

synchronous operation, or the low solution cost of asynchro-

nous operation. Along with flexibility, the LM2655 offers high

power density with the small footprint of a TSSOP-16 pack-

age.

n 4V to 14V input voltage range

n Internal high-side MOSFET with low R_DS(ON)= 0.033Ω

n 300 kHz fixed frequency internal oscillator

n Low-side drive for synchronous operation

n Guaranteed less than 12 µA shutdown current

n Patented current sensing for current mode control

n Programmable soft-start

High efficiency ( 90%) is obtained through the use of an in-

n Input undervoltage lockout

ternal low ON-resistance (33mΩ) MOSFET, and an external

N-Channel MOSFET. This feature, together with its low qui-

escent current, makes the LM2655 an ideal fit in portable ap-

plications.

n Output overvoltage shutdown protection

n Output undervoltage shutdown protection

n Thermal Shutdown

n 16-pin TSSOP package

Integrated in the LM2655 are all the power, control, and drive

functions for asynchronous operation. In addition, a low-side

driver output allows easy synchronous operation. The IC

uses patented current sensing circuitry that eliminates the

external current sensing resistor required by other current-

mode DC-DC converters. A programmable soft-start feature

limits start up current surges and provides a means of se-

quencing multiple power supplies.

Applications

n Hard disk drives

n Internet appliances

n TFT monitors

n Computer peripherals

n Battery powered devices

Typical Application

DS101284-29

DS101284

www.national.com

12 3 4 5 6 7...17

中文翻译

下载PDF

与LM2655相关器件

型号	品牌	获取价格	描述	数据表
LM2655_05	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655_15	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTC-3.3	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTC-3.3/NOPB	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTC-ADJ	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTC-ADJ/NOPB	NSC	获取价格	IC SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator
LM2655MTC-ADJ/NOPB	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTCX-3.3	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655MTCX-3.3/NOPB	NSC	获取价格	IC SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regulator
LM2655MTCX-3.3/NOPB	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator