LP3879 Datasheet, PDF (1/11 Pages) National Semiconductor (TI) – Micropower 800mA Low Noise Ceramic Stable Voltage Regulator for Low Voltage Applications

June 2006
LP3879
Micropower 800mA Low Noise "Ceramic Stable" Voltage
Regulator for Low Voltage Applications
General Description
The LP3879 is a 800 mA fixed-output voltage regulator
designed to provide high performance and low noise in
applications requiring output voltages between 1.0V and
1.2V.
Using an optimized VIP™ (Vertically Integrated PNP) pro-
cess, the LP3879 delivers superior performance:
Ground Pin Current: Typically 5.5 mA @ 800 mA load, and
200 µA @ 100 µA load.
Low Power Shutdown: The LP3879 draws less than 10 µA
quiescent current when shutdown pin is pulled low.
Precision Output: Guaranteed output voltage accuracy is
1% at room temperature.
Low Noise: Broadband output noise is only 18 µV (typical)
with 10 nF bypass capacitor.
Features
n Standard output voltage: 1.00V, 1.20V
n Custom voltages available from 1.0V to 1.2V (50 mV
increments)
n Input voltage: 2.5 to 6V
n 1% initial output accuracy
n Designed for use with low ESR ceramic capacitors
n Very low output noise
n Sense option improves load regulation
n 8 Lead PSOP and LLP surface mount packages
n <10 µA quiescent current in shutdown
n Low ground pin current at all loads
n High peak current capability
n Over-temperature/over-current protection
n -40˚C to +125˚C junction temperature range
Applications
n ASIC Power Supplies In:
- Desktops, Notebooks and Graphic Cards
- Set Top Boxes, Printers and Copiers
n DSP and FPGA Power Supplies
n SMPS Post-Regulator
n Medical Instrumentation
Basic Application Circuit
20161303
*Capacitance values shown are minimum required to assure stability. Larger output capacitor provides improved dynamic response. Output capacitor must
meet ESR requirements (see Application Information).
**The Shutdown pin must be actively terminated (see Application Information). Tie to INPUT (Pin 4) if not used.
VIP™ is a trademark of National Semiconductor Corporation.
© 2006 National Semiconductor Corporation DS201613
www.national.com