Linear Technology has a digitally programmable 5A LDO regulator.

Dropout voltage at 5A is 85mV. Output voltage noise at 5A is 25µVRMS over a 10Hz to 100kHz bandwidth.

The LT3070's 1MHz unity gain bandwidth, coupled with its minimum 15µF ceramic output capacitance, provides 30mV of overshoot/undershoot in response to a fast 4.5A output load step.

The output voltage is digitally programmable from 0.8V to 1.8V in 50mV increments. Accuracy is tightly specified at ±1% over line, load and temperature. A digital margining feature can adjust system output voltage in increments of ±1%, ±3% or ±5%, advantageous during system development debug.

A PowerGood flag indicates if output voltage is in regulation or the device is in UVLO and the flag also provides an early warning indication of a thermal fault. The LT3070's input supply voltage range is 0.95V to 3.0V and its bias supply voltage ranges from 2.2V to 3.6V. The bias supply provides gate drive to the internal NMOS pass device.

Multiple LT3070 devices can be easily paralleled for higher output current and to spread heat across a PCB. A tracking feature can control a buck regulator powering the LT3070's input.