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LM26001_08 PDF预览

LM26001_08

更新时间: 2024-11-22 05:42:03
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
18页 500K
描述
1.5A Switching Regulator with High Efficiency Sleep Mode

LM26001_08 数据手册

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May 29, 2008  
LM26001  
1.5A Switching Regulator with High Efficiency Sleep Mode  
General Description  
Features  
The LM26001 is a switching regulator designed for the high  
efficiency requirements of applications with stand-by modes.  
The device features a low-current sleep mode to maintain ef-  
ficiency under light-load conditions and current-mode control  
for accurate regulation over a wide input voltage range. Qui-  
escent current is reduced to 10 µA typically in shutdown mode  
and less than 40 µA in sleep mode. Forced PWM mode is also  
available to disable sleep mode.  
High efficiency sleep mode  
40 µA typical Iq in sleep mode  
10 µA typical Iq in shutdown mode  
3.0V minimum input voltage  
4.0V to 38V continuous input range  
1.5% reference accuracy  
Cycle-by-cycle current limit  
The LM26001 can deliver up to 1.5A of continuous load cur-  
rent with a fixed current limit, through the internal N-channel  
switch. The part has a wide input voltage range of 4.0V to 38V  
and can operate with input voltages as low as 3V during line  
transients.  
Adjustable Frequency (150 kHz to 500 kHz)  
Synchronizable to an external clock  
Power Good Flag  
Forced PWM function  
Operating frequency is adjustable from 150 kHz to 500 kHz  
with a single resistor and can be synchronized to an external  
clock.  
Adjustable Soft-start  
TSSOP-16 exposed pad package  
Thermal Shut Down  
Other features include Power good, adjustable soft-start, en-  
able pin, input under-voltage protection, and an internal boot-  
strap diode for reduced component count.  
Applications  
Automotive Telematics  
Navigation systems  
In-Dash Instrumentation  
Battery Powered Applications  
Stand-by power for home gateways/set-top boxes  
Typical Application Circuit  
20179401  
© 2008 National Semiconductor Corporation  
201794  
www.national.com  

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