Features: 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)
TO-220, TO-263 packages
Over temperature/over current protection
-40 to +125 junction temperature rangeApplicationDSP Power Supplies
Server Core and I/O Supplies
PC Add-in-Cards
Local Regulators in Set-Top Boxes
Microcontroller Power Supplies
High Efficiency Power Supplies
SMPS Post-RegulatorsSpecificationsStorage Temperature Range.......................................................... -65 to +150
Lead Temp. (Soldering, 5 seconds)................................................................ 260
ESD Rating
Human Body Model (Note 3)............................................................................. 2kV
Machine Model (Note 10)................................................................................ 200V
Power Dissipation (Note 2) .........................................................Internally Limited
VIN Supply Voltage (Survival) ..............................................................-0.3V to +6V
VBIAS Supply Voltage (Survival) ..........................................................-0.3V to +7V
Shutdown Input Voltage (Survival)..................................................... -0.3V to +7V
IOUT (Survival)............................................................................. Internally Limited
Output Voltage (Survival) ....................................................................-0.3V to +6V
Junction Temperature..................................................................... -40 to +150
DescriptionThe LP3882 is a high current, fast response regulator which canmaintainoutputvoltageregulationwithminimuminputto 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 regula- tors, the CMOS architecture consumes extremely low quies- cent current at any output load current. The use of an N-MOS power transistor results in wide bandwidth, yet mini- mum external capacitance is required to maintain loop sta- bility.
The fast transient response of these devices makes them suitable for use in powering DSP, Microcontroller Core volt- ages 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 accu-racy.
LP3882 Data Sheet
