VIN

1.0µF

Ceramic

VOUT

1.0µF

Ceramic

VOUT

GND

VOUT Sense

(LLP only)

VIN

LP8340

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SNVS221D – FEBRUARY 2003 – REVISED APRIL 2013

LP8340 Low Dropout, Low IQ, 1.0A CMOS Linear Regulator

Check for Samples: LP8340

1

FEATURES

DESCRIPTION

The LP8340 low-dropout CMOS linear regulator is

2

•

±1.5% Typical VOUT Tolerance

available in 5V, 3.3V, 2.5V, 1.8V and adjustable

•

420mV Typical Dropout @ 1.0A (VO = 5V)

output versions. Packaged in the 6ld WSON package

•

Wide Operating Range 2.7V to 10V

and 3ld PFM. The LP8340 can deliver up to 1.0A

output current.

•

Internal 1.0A PMOS Output Transistor

•

19µA Typical Quiescent Current

Typical dropout voltage is 420mV at 1.0A for the 5.0V

version, 540mV at 1.0A for the 3.3V version, 670mV

•

Thermal Overload Limiting

at 1.0A for the 2.5V version and 680mV at 800mA for

•

Foldback Current Limiting

the 1.8V version.

•

Zener Trimmed Bandgap Reference

The LP8340 includes a zener trimmed bandgap

•

Space Saving WSON package

voltage

reference,

foldback

current

limiting

and

•

Temperature Range

thermal overload limiting.

–

LP8340C 0°C to 125°C

The LP8340 features a PMOS output transistor which

unlike PNP type low dropout regulators requires no

–

LP8340I

−40°C to 125°C

base drive current. This allows the device ground

current to remain less than 50µA over operating

APPLICATIONS

temperature, supply voltage and irrespective of the

•

Hard Disk Drives

load current.

•

Notebook Computers

•

Battery Powered Electronics

•

Portable Instrumentation

Typical Applications

Figure 1. Fixed VOUT

1

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2013, 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.