LM2696MXAX Datasheet

IC型號：
LM2696MXAX
PDF描述：
3A, Constant On Time Buck Regulator
文件大小：
829.29KB
PDF頁數(shù)：
19頁
芯片廠家：
NSC

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LM2696 3A, Constant On Time Buck Regulator

October 2005

LM2696

3A, Constant On Time Buck Regulator

General Description

The LM2696 is a pulse width modulation (PWM) buck regu-

lator capable of delivering up to 3A into a load. The control

loop utilizes a constant on-time control scheme with input

voltage feed forward. This provides a topology that has

excellent transient response without the need for compen-

sation. The input voltage feed forward ensures that a con-

stant switching frequency is maintained across the entire V

range.

The LM2696 is capable of switching frequencies in the range

of 100 kHz to 500 kHz. Combined with an integrated 130 m鈩?/div>

high side NMOS switch the LM2696 can utilize small sized

external components and provide high efficiency. An internal

soft-start and power-good flag are also provided to allow for

simple sequencing between multiple regulators.

The LM2696 is available with an adjustable output in an

exposed pad TSSOP-16 package.

Features

Input voltage range of 4.5V鈥?4V

Constant On-Time

No compensation needed

Maximum Load Current of 3A

Switching frequency of 100 kHz鈥?00 kHz

Constant frequency across input range

TTL compatible shutdown thresholds

Low standby current of 12 碌A

130 m鈩?internal MOSFET switch

Applications

High efficiency step-down switching regulators

LCD Monitors

Set-Top Boxes

Typical Application Circuit

20153401

漏 2005 National Semiconductor Corporation

DS201534

www.national.com

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