OUT(FB)

2

3

4

5

6

7

8

1

SET

FB

GND(CP)

CP

EN

IN(CP)

GND

GND

R1

R2

LP38798-ADJ

GND

IN

IN

OUT

OUT

9

10

11

12

DAP

ON

OFF

+

Product

Folder

Sample &

Buy

Technical

Documents

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Software

Support &

Community

LP38798

www.ti.com

SNOSCT6A – MARCH 2013 – REVISED MAY 2013

LP38798-ADJ High PSRR, Ultra Low Noise, 800 mA Linear Voltage Regulator for

RF/Analog Circuits

1

FEATURES

DESCRIPTION

The LP38798-ADJ is a high performance linear

•

regulator capable of supplying 800 mA output current.

kHz)

Designed to meet the requirements of sensitive

•

High PSRR: 90 dB at 10 kHz, 60 dB at 100 kHz

RF/Analog circuitry, the LP38798-ADJ implements a

•

Wide Operating Input Voltage Range: 3.0V to

novel linear topology on an advanced CMOS process

to deliver ultra-low output noise and high PSRR at

20V

switching

power

supply

frequencies.

The

•

LP38798SD-ADJ is stable with both ceramic and

25°C)

tantalum output capacitors and requires a minimum

•

Very Low Dropout : 200 mV (Typical) at 800mA

output capacitance of only 1 µF for stability.

•

Stable with Ceramic or Tantalum Output

The LP38798-ADJ can operate over a wide input

Capacitors

voltage range (3.0V to 20V) making it well suited for

•

Excellent Line and Load Transient Response

many post-regulation applications.

•

Current Limit and Over-Temperature

The LP38798-ADJ is available in a 12-Lead WSON

Protection

package (4.0 x 4.0 x 0.8 mm) with Thermal Pad.

APPLICATIONS

•

RF and VCO Power

•

Wireless LAN Devices

•

Wireless Cable Modems

•

Low Noise Post-Regulation

Typical Application Circuit

*.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.