LT3023/LT3027 Micropower Regulators

Analog Devices' LT3023 and LT3027 are dual, micropower, low noise, low dropout regulators. With an external 0.01 µF bypass capacitor, output noise drops to 20 µV_RMS over a 10 Hz to 100 kHz bandwidth. Designed for use in battery-powered systems, the low 20 µA/25 µA quiescent current per channel makes it an ideal choice. In shutdown, quiescent current drops to less than 0.1 µA. Shutdown control is independent for each channel, allowing for flexibility in power management. The device is capable of operating over an input voltage from 1.8 V to 20 V and can supply 100 mA of output current from each channel with a dropout voltage of 300 mV. Quiescent current is well controlled in dropout.

The LT3023 and LT3027 regulators are stable with output capacitors as low as 1 µF. Small ceramic capacitors can be used without the series resistance required by other regulators.

Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting, and reverse current protection. The device is available as an adjustable device with a 1.22 V reference voltage. The LT3023 and LT3027 regulators are available in the thermally enhanced 10-lead MSOP and DFN packages.