Date: 21/12/2009

150mA adaptive LDO regulator for battery operated portable devices

Austriamicrosystems has announced the expansion of its low drop out regulator portfolio with the introduction of AS1367 "Eco" LDO, which is capable of delivering up to 150mA at its regulated output. The AS1367 is suitable for cellular phones, cordless phones, wireless communication equipment, portable games, cameras, video recorders, portable audio-video equipment and personal digital assistants.

The AS1367 provides high speed operation, low power consumption and high efficiency by automatically switching between a light load and a heavy load mode depending upon the output current level.

The key features of the AS1367 LDO are,

Operating input voltage ranges from 2.0V to 5.5V
Operating output voltage ranges from 1.2V to 5.0V (50mV steps)
150mA of max output current
100nA of low shutdown current
High PSRR of 60dB at 10kHz
Integrated overtemperature/overcurrent protection
Under-voltage lockout feature
Chip enable input
Low quiescent current of 10µA
Low output noise of 15µV at 100kHz bandwidth

A bypass pin is included to reduce noise. The device features an integrated short-circuit and over current protection. Under-Voltage lockout prevents erratic operation when the input voltage is slowly decaying.

"The AS1367 LDO provides a solution to variable duty cycle load issues that many customers now experience," said Bruce Ulrich, Marketing Director Consumer & Communications at Austriamicrosystems. "In portable battery powered equipment, as applications are switched on and off intermittently, load current variations can become extreme. Austriamicrosystems' AS1367 LDO adapts to either heavy or light load situations maintaining an excellent overall performance. With prices at $0.35 for 1K pcs the AS1367 is a fine addition to our new 'Performance without the Premium' range of LDO's."

Operating temperature range: -40°C to +85°C
Package: 8-pin TDFN 2x2 package
Availability: Now

For more details visit www.austriamicrosystems.com/LDO/AS1367