LP3882 1.5A Fast-Response Ultra Low Dropout Linear Regulators
August 2003
LP3882 1.5A Fast-Response Ultra Low Dropout ...
LP3882 1.5A Fast-Response Ultra Low Dropout Linear Regulators
August 2003
LP3882 1.5A Fast-Response Ultra Low Dropout Linear Regulators
General Description
The LP3882 is a high current, fast response regulator which can maintain output
voltage regulation with minimum input to output
voltage drop. Fabricated on a
CMOS process, the device operates from two input
voltages: Vbias provides
voltage to drive the gate of the N-MOS power transistor, while Vin is the input
voltage which supplies power to the load. The use of an external bias rail allows the part to operate from ultra low Vin
voltages. Unlike bipolar regulators, the
CMOS architecture consumes extremely low quiescent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet minimum external capacitance is required to maintain loop stability. The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core
voltages and Switch Mode Power Supply post regulators. The parts are available in TO-220 and TO-263 packages. Dropout
Voltage: 110 mV (typ) @ 1.5A load current. Ground Pin Current: 3 mA (typ) at full load. Shutdown Current: 60 nA (typ) when S/D pin is low. Precision Output
Voltage: 1.5% room temperature accuracy.
Features
n n n n n n n n Ultra low dropout
voltage (110 mV @ 1.5A typ) Low ground pin current Load regulation of 0.04%/A 60 nA typical quiescent current in shutdown 1.5% output accuracy (25˚C) TO-220, TO-263 packages ...