LP3881ESX-1.8 ,0.8A Fast-Response Ultra Low Dropout Linear RegulatorsLP3881 0.8A Fast-Response Ultra Low Dropout Linear RegulatorsAugust 2003LP38810.8A Fast-Response Ul ..
LP3881ET-1.2 ,0.8A Fast-Response Ultra Low Dropout Linear RegulatorsApplicationsmum external capacitance is required to maintain loop sta-n DSP Power Suppliesbility.n ..
LP3881ET-1.5 ,0.8A Fast-Response Ultra Low Dropout Linear RegulatorsFeaturesn Ultra low dropout voltage (75 mV @ 0.8A typ)The LP3881 is a high current, fast response r ..
LP3882ES-1.2 ,1.5A Fast-Response Ultra Low Dropout Linear RegulatorsLP3882 1.5A Fast-Response Ultra Low Dropout Linear RegulatorsAugust 2003LP38821.5A Fast-Response Ul ..
LP3882ES-1.5 ,1.5A Fast-Response Ultra Low Dropout Linear RegulatorsApplicationsmum external capacitance is required to maintain loop sta-n DSP Power Suppliesbility.n ..
LP3882ES-1.8 ,1.5A Fast-Response Ultra Low Dropout Linear RegulatorsFeaturesn Ultra low dropout voltage (110 mV @ 1.5A typ)The LP3882 is a high current, fast response ..
LT1021CCN8-10 ,Precision Reference
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LT1021DCN8-7 ,Precision Reference
LT1021DCN8-7 ,Precision Reference
LT1021DCN8-7 ,Precision Reference
LT1021DCS8-10#PBF ,Precision Reference
LP3881ES-1.2-LP3881ES-1.5-LP3881ES-1.8-LP3881ESX-1.8-LP3881ET-1.2-LP3881ET-1.5
0.8A Fast-Response Ultra Low Dropout Linear Regulators
LP3881
0.8A Fast-Response Ultra Low Dropout Linear
Regulators
General DescriptionThe LP3881isa high current, fast response regulator which
can maintain output voltage regulation with minimum inputto
output voltage drop. Fabricatedona CMOS process, the
device operates from two input voltages: Vbias provides
voltageto drive the gateof the N-MOS power transistor,
while Vinis the input voltage which supplies powerto the
load. The useofan external bias rail allows the partto
operate from ultra low Vin voltages. Unlike bipolar regula-
tors,the CMOS architecture consumes extremely low quies-
cent currentat any output load current. The useof an
N-MOS power transistor resultsin wide bandwidth,yet mini-
mum external capacitanceis requiredto maintain loop sta-
bility.
The fast transient responseof these devices makes them
suitablefor usein powering DSP, Microcontroller Core volt-
ages and Switch Mode Power Supply post regulators. The
partsare availablein TO-220 and TO-263 packages.
Dropout Voltage:75 mV (typ)@ 0.8A load current.
Ground Pin Current:3 mA (typ)atfull load.
Shutdown Current:60nA (typ) when S/Dpinis low.
Precision Output Voltage: 1.5% room temperature accu-
racy.
Features Ultra low dropout voltage (75 mV@ 0.8A typ) Low groundpin current Load regulationof 0.04%/A60nA typical quiescent currentin shutdown 1.5% output accuracy (25˚C) TO-220, TO-263 packages Over temperature/over current protection −40˚Cto +125˚C junction temperature range
Applications DSP Power Supplies Server Core andI/O Supplies PC Add-in-Cards Local Regulatorsin Set-Top Boxes Microcontroller Power Supplies High Efficiency Power Supplies SMPS Post-Regulators
Typical Application Circuit20063001 least4.7µFof inputand output capacitanceis requiredfor stability.
Connection DiagramsTO-220, Top View
TO-263, Top View
August 2003
LP3881
0.8A
Fast-Response
Ultra
Low
Dropout
Linear
Regulators
