LP3883 3A Fast-Response Ultra Low Dropout Linear Regulators
August 2003
LP3883 3A Fast-Response Ultra Low Dropout Line...
LP3883 3A Fast-Response Ultra Low Dropout Linear
Regulators
August 2003
LP3883 3A Fast-Response Ultra Low Dropout Linear
Regulators
General Description
The LP3883 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: 210 mV (typ) @ 3A 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 (210 mV @ 3A 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 Over tem...