17 May 2010

1A VLDO outputs down to 0.2 from 0.9V input

Linear Technology has announced the LT3022, a 1A very low dropout linear regulator (VLDO), featuring input voltage capability down to 0.9V and adjustable output voltage down to 0.2V.

The LT3022's low VIN capability, coupled with the device's low dropout (145mV typical at full load), make it suitable for low voltage, high current rails in digital ICs such as fpgas, asics, dsps, microprocessors and microcontrollers.

It also has applications in general high efficiency, low-Vin-to-low-Vout conversion (for example, 1.8 to 1.5V, 1.5 to 1.2V or 1.2 to 0.9V). The device offers low power operation at 400µA quiescent current with less than 10µA in shutdown, according to Linear.

The LT3022 regulator optimises stability and transient response with low ESR, ceramic output capacitors as small as 10µF. It features +/- 3% output voltage accuracy over line, load and temperature, 0.1% typical line regulation and 0.1% typical load regulation.

The device's internal protection circuitry includes reverse-battery protection, reverse output protection, reverse output-to-input (current) protection, current limiting, and thermal limiting with hysteresis.
The LT3022EDHC and LT3022IDHC (16lead 3 x 5mm DFN) and the LT3022EMSE & LT3022IMSE (thermally enhanced MSOP-16) operate from -40 to 125ºC junction temperature and are available from stock in both E and I grades.

Author
Chris Shaw

Supporting Information

Websites
http://www.linear.com

Companies
Linear Technology (UK) Ltd

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