參數(shù)資料
型號: LM2696MXA
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: 3A, Constant On Time Buck Regulator
中文描述: 6.4 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝: TSSOP-16
文件頁數(shù): 1/19頁
文件大小: 833K
代理商: LM2696MXA
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
IN
range.
The LM2696 is capable of switching frequencies in the range
of 100 kHz to 500 kHz. Combined with an integrated 130 m
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
n
Input voltage range of 4.5V–24V
n
Constant On-Time
n
No compensation needed
n
Maximum Load Current of 3A
n
Switching frequency of 100 kHz–500 kHz
n
Constant frequency across input range
n
TTL compatible shutdown thresholds
n
Low standby current of 12 μA
n
130 m
internal MOSFET switch
Applications
n
High efficiency step-down switching regulators
n
LCD Monitors
n
Set-Top Boxes
Typical Application Circuit
20153401
October 2005
L
2005 National Semiconductor Corporation
DS201534
www.national.com
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