1FEATURES
2• 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 18V Continuous Input Range
• 2.0% 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
• HTSSOP-16 Exposed Pad Package
• Thermal Shut Down

APPLICATIONS
• Automotive Telematics
• Navigation Systems
• In-Dash Instrumentation
• Battery Powered Applications
• Stand-by Power for Home Gateways/Set-Top
Boxes

DESCRIPTION
The LM26001B 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 control for accurate
regulation over a wide input voltage range. Quiescent 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.
The LM26001B 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 18V 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.