LP3878-ADJ Datasheet, PDF (1/13 Pages) National Semiconductor (TI) – Micropower 800mA Low Noise(Ceramic Stable) Adjustable Voltage Regulator for 1V to 5V Applications

May 2005
LP3878-ADJ
Micropower 800mA Low Noise "Ceramic Stable"
Adjustable Voltage Regulator for 1V to 5V Applications
General Description
The LP3878-ADJ is an 800 mA adjustable output voltage
regulator designed to provide high performance and low
noise in applications requiring output voltages as low as
1.0V.
Using an optimized VIP™ (Vertically Integrated PNP) pro-
cess, the LP3878-ADJ delivers superior performance:
Ground Pin Current: Typically 5.5 mA @ 800 mA load, and
180 µA @ 100 µA load.
Low Power Shutdown: The LP3878-ADJ 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 1.0V to 5.5V output
n Designed for use with low ESR ceramic capacitors
n Very low output noise
n 8 Lead PSOP and LLP surface mount package
n <10 µA quiescent current in shutdown
n Low ground pin current at all loads
n Over-temperature/over-current protection
n -40˚C to +125˚C operating 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
20120903
*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.
© 2005 National Semiconductor Corporation DS201209
www.national.com