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Energy-efficient LDOs consume 560nA at no-load

Posted: 10 Feb 2011     Print Version  Bookmark and Share

Keywords:low-dropout regulators  LDOs  power  mobile devices 

Analog Devices Inc. reveals four low-dropout regulators (LDOs), the ADP160, ADP161, ADP162 and ADP163 that claim to extend battery life with the use of only 560nA (typical) at no load and 42µA of quiescent current (typical) at full load. The devices are designed to address the size, power dissipation and power-supply-rejection requirements of wireless mobile devices.

ADP16x LDO regulators

They provide 70dB power-supply-rejection ratio at 60Hz, and are designed for applications such as power meter reader/data terminals, portable industrial, medical measurement devices and remotely located equipment operating from batteries or solar power.

The LDOs provide up to 150mA of output current and operate from 2.2V to 5.5V power supplies. The ADP160 and ADP162 fixed-output and ADP161 and ADP163 adjustable-output voltage regulators are available in TSOT packages, with the ADP160 and ADP162 also available in WLCSP. The ADP160 and ADP161 also include an output switch to discharge the output load capacitor to zero volts when the device is turned OFF to ensure MCUs are in a known state for restart.

Other features are a small 1µF ceramic output capacitor that enables very compact designs when combined with the ADP162 LDO in a 1 x 1 mm WLCSP package; and initial accuracy of ±1 per cent to meets the needs of 1.8V, 1.5V and 1.2V systems.

The LDOs are in volume production and are priced at Rs.15.59 ($0.34) each for orders of 1,000.





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