LP3878-ADJ_15 Datasheet, PDF (1/25 Pages) Texas Instruments – Micropower 800-mA Low-Noise

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LP3878-ADJ
SNVS311D – MAY 2005 – REVISED FEBRUARY 2015
LP3878-ADJ Micropower 800-mA Low-Noise "Ceramic Stable" Adjustable Voltage
Regulator for 1-V to 5-V Applications
1 Features
•1 Input Supply Voltage: 2.5 V to 16V
• Output Voltage Range: 1 V to 5.5 V
• Designed for Use With Low-ESR Ceramic
Capacitors
• Very Low Output Noise
• 8-Lead SO PowerPAD™ and WSON Surface-
Mount Packages
• < 10-μA Quiescent Current in Shutdown
• Low Ground Pin Current at all Loads
• Overtemperature and Overcurrent Protection
• –40°C to 125°C Operating Junction Temperature
Range
2 Applications
• ASIC Power Supplies In:
– Desktops, Notebooks, and Graphic Cards
– Set Top Boxes, Printers, and Copiers
• DSP and FPGA Power Supplies
• SMPS Post-Regulator
• Medical Instrumentation
3 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 V.
Using an optimized VIP (Vertically Integrated PNP)
process, the LP3878-ADJ delivers superior
performance:
• Ground Pin Current: Typically 5.5 mA at 800-mA
load, and 180 µA at 100-µA load.
• Low Power Shutdown: The LP3878-ADJ draws
less than 10-μA quiescent current when the
SHUTDOWN pin is pulled low.
• Precision Output: Ensured output voltage
accuracy is 1% at room temperature.
• Low Noise: Broadband output noise is only 18 μV
(typical) with a 10-nF bypass capacitor.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP3878-ADJ
SO PowerPAD (8)
WSON (8)
4.89 mm × 3.90 mm
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Basic Application Circuit
V_IN
IN
OUT
V_OUT
LP3878-ADJ
R1
C_FF
**S/D
*4.7 µF
(Ceramic or
Tantalum
recommended)
S/D
BYPASS
ADJ
GND
*0.01 µF
R2
*10 µF
(Ceramic
recommended)
*Capacitor values shown are minimum required to assure stability. A larger output capacitor provides improved
dynamic response. Output capacitor must meet ESR requirements (see Application Information).
**The SHUTDOWN (or S/D) pin must be actively terminated (see Device Functional Modes). Tie to IN (pin 4) if not
used.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.