DESCRIPTION

· The LP2953A is a micropower voltage regulator with an adjustable output voltage range from 1.23V to 29V. It features very low quiescent current (130μA typical at 1mA load) and low dropout voltage (typically 60mV at light load and 470mV at 250mA load current), making it ideal for battery-powered systems. The device also includes current and thermal limiting, reverse battery protection, and a 50mA typical output pull-down crowbar. An auxiliary comparator with CMOS/TTL compatible output levels is included for fault detection and low input line detection. The error flag indicates when the output voltage drops out of regulation.

FEATURES

· Adjustable output voltage from 1.23V to 29V
· Ensured 250mA output current
· Extremely low quiescent current
· Low dropout voltage
· Tight line and load regulation
· Very low temperature coefficient
· Current and thermal limiting
· Reverse battery protection
· 50mA typical output pull-down crowbar
· Auxiliary comparator with CMOS/TTL compatible output levels

APPLICATIONS

· High-efficiency linear regulator
· Regulator with under-voltage shutdown
· Low dropout battery-powered regulator
· Snap-ON/Snap-OFF regulator