Datasheet > LM2653

LM2653

更新时间： 2024-11-02 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
14页	248K
描述
1.5A 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

LM2653 数据手册

March 2001

LM2653

1.5A High Efficiency Synchronous Switching Regulator

n 1.5V to 5.0V adjustable output voltage

n 0.1Ω Switch On Resistance

The LM2653 switching regulator provides high efficient

n 300 kHz fixed frequency internal oscillator

General Description

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

This feature makes the LM2653 an ideal fit in

battery-powered applications.

n 7 µA shutdown current

n Patented current sensing for current mode control

n Input undervoltage lockout

n Output overvoltage shutdown protection

Synchronous rectification is used to achieve up to 97%

efficiency. At light loads, the LM2653 enters a low power

n Output undervoltage shutdown protection

n Adjustable soft-start

n Adjustable PGOOD delay

hysteretic or “sleep” mode to keep the efficiency high. In

many applications, the efficiency still exceeds 80% at 15 mA

load. A shutdown pin is available to disable the LM2653 and

reduce the supply current to 7µA.

n Current limit and thermal shutdown

All the power, control, and drive functions are integrated

within the ICs. The ICs contain patented current sensing

circuity for current mode control. This feature eliminates the

external current sensing resistor required by other

current-mode DC-DC converters.

Applications

n Webpad

n Personal digital assistants (PDAs)

n Computer peripherals

n Battery-powered devices

n Notebook computer video supply

n Handheld scanners

The ICs have a 300 kHz fixed frequency internal oscillator.

The high oscillator frequency allows the use of extremely

small, low profile components.

Protection features include thermal shutdown, input under-

voltage lockout, adjustable soft-start, cycle by cycle current

limit, output overvoltage and undervoltage protections.

n GXM I/O and core voltage

n High efficiency 5V conversion

Features

n Efficiency up to 97%

n 4V to 14V input voltage range

Typical Application

Efficiency vs Load Current

(V_IN= 5V, V_OUT= 3.3V)

10104930

10104902

DS101049

www.national.com

12 3 4 5 6 7...14

中文翻译

下载PDF

与LM2653相关器件

型号	品牌	获取价格	描述	数据表
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
LM2653MTCX-ADJ	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2653MTCX-ADJ/NOPB	TI	获取价格	LM2653 1.5A High Efficiency Synchronous Switching Regulator
LM2655	NSC	获取价格	2.5A High Efficiency Synchronous Switching Regulator
LM2655	TI	获取价格	2.5A High Efficiency Synchronous Switching Regulator
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