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LP3878SD-1.0
Micropower 800mA Low Noise 'Ceramic Stable' Voltage Regulator for Low Voltage Applications
LP3878
Micropower 800mA Low Noise "Ceramic Stable" Voltage
Regulator for Low Voltage Applications
Designed for Use with Very Low ESR Output Capacitors
General DescriptionThe LP3878isa 800 mA fixed-output voltage regulator
designedto provide high performance and low noisein
applications requiring output voltages between 1.0V and
1.2V.
Output noise canbe reducedto 18µV (typical)by connecting external10nF capacitortothe bypass pin.
Usingan optimized VIP™ (Vertically Integrated PNP) pro-
cess, the LP3878 delivers superior performance:
Ground Pin Current: Typically5 mA@ 800 mA load, and
180µA@ 100µA load.
Sleep Mode: The LP3878 draws less than2.0µA quiescent
current when shutdownpinis pulled low.
Precision Output: Guaranteed output voltage accuracyisat room temperature.
Features Standard output voltage: 1.00V Custom voltages available from 1.0Vto 1.2V (50 mV
increments) Input voltage:2.2to 6.0V 1% initial output accuracy Guaranteed 800 mA continuous output current Designedfor use with low ESR ceramic capacitors Very low output noise with external capacitor Sense option improves load regulation8 Lead LLP surface mount package <2.0µA quiescent currentin shutdown Low groundpin currentatall loads High peak current capability (1200 mA typical) Overtemperature/overcurrent protection 0˚Cto +125˚C junction temperature range
Applications ASIC Power SuppliesIn: Desktops, Notebooks and Graphic Cards Set Top Boxes, Printers and Copiers DSP and FPGA Power Supplies SMPS Post-Regulator
Basic Application Circuit*Capacitance values shownare minimum requiredto assure stability,but maybe increased without limit. Larger output capacitor provides improved dynamic
response. Output capacitor must meet ESR requirements (see Application Hints).
**Shutdown mustbe actively terminated (see App. Hints).Tieto INPUT (Pin4)ifnot used.
November 2004
LP3878
Micropower
800mA
Low
Noise
"Ceramic
Stable"
oltage
Regulator
for
Low
oltage
Applications
Designed
for
Use
with
ery
Low
ESR
Output
Capacitors
