EN

IN

OUT

GND

GND

LP3990

1 µF

1 µF

OFF

ON

GND

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LP3990

SNVS251J – MAY 2004 – REVISED SEPTEMBER 2014

LP3990 150-mA Linear Voltage Regulator for Digital Applications

1 Features

3 Description

The LP3990 regulator is designed to meet the

1

•

1% Voltage Accuracy at Room Temperature

requirements of portable, battery-powered systems

•

Stable with Ceramic Capacitor

providing an accurate output voltage, low-noise, and

•

Logic Controlled Enable

low-quiescent current. The LP3990 will provide a 0.8-

V output from the low input voltage of 2 V at up to a

•

No Noise Bypass Capacitor Required

150-mA load current. When switched into shutdown

•

Thermal-Overload and Short-Circuit Protection

mode via a logic signal at the enable pin (EN), the

•

Input Voltage Range, 2 V to 6 V

power consumption is reduced to virtually zero.

•

Output Voltage Range, 0.8 V to 3.3 V

The LP3990 is designed to be stable with space-

•

Output Current, 150 mA

saving ceramic capacitors with values as low as 1 µF.

•

Output Stable - Capacitors, 1 µF

Performance is specified for a –40°C to 125°C

•

junction temperature range.

•

For output voltages other than 0.8 V, 1.2 V, 1.35 V,

•

1.5 V, 1.8 V, 2.5 V, 2.8 V, or 3.3 V, please contact

the Texas Instruments sales office.

•

PSRR, 55 dB at 1 kHz

•

Fast Start-Up, 105 µs

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

2 Applications

DSBGA (4)

1.324 mm x 1.045 mm (MAX)

•

Cellular Handsets

LP3990

WSON (6)

2.90 mm x 1.60 mm

•

Hand-Held Information Appliances

SOT-23 (5)

3.00 mm x 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

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.