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LM26001EM Datasheet

  • LM26001EM

  • National Semiconductor [1.5A Switching Regulator with High ...

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LM26001 1.5A Switching Regulator with High Efficiency Sleep Mode
PRELIMINARY
May 2006
LM26001
1.5A Switching Regulator with High Efficiency Sleep
Mode
General Description
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
efficiency under light-load conditions and current-mode con-
trol for accurate regulation over a wide input voltage range.
Quiescent current is reduced to 10 碌A typically in shutdown
mode and less than 40 碌A in sleep mode. Forced PWM
mode is also available to disable sleep mode.
The LM26001 can deliver up to 1.5A of continuous load
current 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.
Operating frequency is adjustable from 150 kHz to 500 kHz
with a single resistor and can be synchronized to an external
clock.
Other features include Power good, adjustable soft-start,
enable pin, input under-voltage protection, and an internal
bootstrap diode for reduced component count.
Features
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High efficiency sleep mode
40 碌A typical Iq in sleep mode
10 碌A 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
Adjustable Frequency (150 kHz to 500 kHz)
Synchronizable to an external clock
Power Good Flag
Forced PWM function
Adjustable Soft-start
TSSOP-16 exposed pad package
Thermal Shut Down
Applications
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Automotive Telematics
Navigation systems
In-Dash Instrumentation
Battery Powered Applications
Stand-by power for home gateways/set-top boxes
Typical Application Circuit
20179401
漏 2006 National Semiconductor Corporation
DS201794
www.national.com

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