Date: 11/11/2009

400mA, 1.2V input voltage LDO regulator and a dual LDO from AMS

Austriamicrosystems has released AS1371, a LDO of 400mA current capability and a operating voltage down to a low input voltage of 1.2V.

The AS1371 operates from a 1.2 to 3.6V supply, making it ideal for low voltage portable battery powered applications. Offering ultra low dropout voltage of 20mV at 100mA, 80mV at 400mA, and with only 50µA quiescent current at maximum load, the AS1371 helps to maximize battery life and performance.

"As microprocessor core voltages continue to drop, customers need to extend the longevity of existing Power Management IC's (PMIC's)" said Bruce Ulrich, Marketing Director Consumer & Communications at austriamicrosystems. "Many of the subsystems in current portable applications such as GPS systems, and Bluetooth, drive the need for peripheral LDO's to work in conjunction with an existing PMIC. The AS1371 addresses this requirement by supporting input voltages down to 1.2Volts. "

The AS1371 is available with pre-programmed output voltages between 0.6V and 3.3V (programmable in 50mV steps.) The Austriamicrosystems solution also features stable output voltage with ceramic capacitors down to a value of 1µF, strict output voltage regulation tolerances (±1%), and good line- and load-regulation. The device includes Integrated Overtemperature / Overcurrent Protection, Under-Voltage Lockout, Power-OK, Low Battery Detection and has a sense input option.

A digital enabled pin allows system-level dynamic power management.

Operating temperature range: -40°C to +85°C

Package:
AS1371: 6-pin 2x2 TDFN package
Availability: Now

For more details visit www.austriamicrosystems.com/LDO/AS1371

Austriamicrosystems has also introduced new dual ultra low voltage noise LDO with high PSRR.

The dual low drop out regulator AS1374 is suitable for portable battery powered devices.

"AS1374 is the dual low drop out regulator of choice for powering circuits that require a low-noise supply, such as RF, cell-phone cameras, wireless base stations and PA bias supplies. Its' superior performance in radio based designs provides the engineers much needed design margin while maintaining the overall system integrity", said Bruce Ulrich, marketing director Consumer & Communications at austriamicrosystems. "Offering low dropout voltage as well as low quiescent current, this dual ultra low voltage noise LDO is ideally suited for any battery-powered device and complements our family of ultra low noise LDO's."

Austriamicrosystems' AS1374 operates from a 2 to 5.5V supply and offer low 120mV dropout at 200mA load currents at each output, it has been designed and optimized to work with low-cost, small-capacitance ceramic capacitors. The AS1374 is available with pre-programmed output voltages between 1.2V and 3.6V (programmable in 50mV steps). The device uses an advanced architecture to achieve ultra low output voltage noise of 20µVRMS and a power supply rejection ratio of better than 85dB (at 1kHz). Two active-high enable pins allow the possibility to switch on or off each output independently from each other.

The AS1374 requires only 1µF output capacitor for stability at any load.

Package: 6-bump WLP package

For more details visit www.austriamicrosystems.com/LDO/AS1374

Editorial Product Rating: Average