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LM2651MTCX-ADJ

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
11页	215K
描述
1.5A High Efficiency Synchronous Switching Regulator

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LM2651MTCX-ADJ 数据手册

February 2000

LM2651

1.5A High Efficiency Synchronous Switching Regulator

General Description

Features

n Ultra high efficiency up to 97

The LM2651 switching regulator provides high efficiency

power conversion over a 100:1 load range (1.5A to 15mA).

This feature makes the LM2651 an ideal fit in

battery-powered applications that demand long battery life in

both run and standby modes.

n High efficiency over a 1.5A to milliamperes load range

n 4V to 14V input voltage range

n 1.8V, 2.5V, 3.3V, or ADJ output voltage

n Internal MOSFET switch with low R_DS(on)of 75mΩ

n 300kHz fixed frequency internal oscillator

n 7µA shutdown current

n Patented current sensing for current mode control

n Input undervoltage lockout

n Adjustable soft-start

Synchronous rectification is used to achieve up to 97 effi-

ciency. At light loads, the LM2651 enters a low power hyster-

etic or “sleep” mode to keep the efficiency high. In many ap-

plications, the efficiency still exceeds 80 at 15mA load. A

shutdown pin is available to disable the LM2651 and reduce

the supply current to less than 10µA.

n Current limit and thermal shutdown

n 16-pin TSSOP package

The LM2651 contains a patented current sensing circuitry for

current mode control. This feature eliminates the external

current sensing resistor required by other current-mode

DC-DC converters.

Applications

n Personal digital assistants (PDAs)

n Computer peripherals

n Battery-powered devices

n Handheld scanners

n High efficiency 5V conversion

The LM2651 has a 300 kHz fixed frequency internal oscilla-

tor. The high oscillator frequency allows the use of extremely

small, low profile components.

A programmable soft-start feature limits current surges from

the input power supply at start up and provides a simple

means of sequencing multiple power supplies.

Other protection features include input undervoltage lockout,

current limiting, and thermal shutdown.

Typical Application

DS100925-1

DS100925-15

Efficiency vs Load Current

(V_IN5V, V_OUT3.3V)

DS100925

www.national.com

12 3 4 5 6 7...11

中文翻译

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LM2651MTCX-ADJ 替代型号

型号	品牌	替代类型	描述	数据表
LM2651MTC-ADJ	TI	功能相似	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125
LM2651MTC-ADJ/NOPB	TI	功能相似	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125
LM2651MTCX-ADJ/NOPB	TI	功能相似	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125

与LM2651MTCX-ADJ相关器件

型号	品牌	获取价格	描述	数据表
LM2651MTCX-ADJ/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16, Switching Regu
LM2651MTCX-ADJ/NOPB	TI	获取价格	1.5A 高效开关稳压器 \| PW \| 16 \| -40 to 125
LM2652	NSC	获取价格	1.5A, Dual High Performance Synchronous Buck Regulator
LM2652MTC	NSC	获取价格	1.5A, Dual High Performance Synchronous Buck Regulator
LM2653	TI	获取价格	1.5A 高效同步开关稳压器
LM2653	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2653_05	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ	NSC	获取价格	1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2653MTC-ADJ/NOPB	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator

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