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LP2983

SNVS170D – OCTOBER 2001 – REVISED APRIL 2016

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Copyright © 2001–2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The LP2983 is a voltage regulator with optimized vertically integrated PNP designed for use with very low ESR

output capacitors, excellent for low noise applications that require a clean voltage supply. The LP2983 has a

wide input voltage range (16 V maximum), high accuracy (A grade 1%), and a fixed output voltage supply

capable of delivering 150 mA. In addition the LP2983 device provides the following features:

•

High accuracy output voltage

•

Low ground current, typically 825

μA at 150-mA load and 75 μA at 1-mA load

•

A sleep mode feature is available, allowing the regulator to consume only 1 µA (typical) when the ON/OFF pin

is pulled low.

•

Overtemperature protection and overcurrent protection circuitry designed to safeguard the device during

unexpected conditions.

•

Thermal protection

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 High-Accuracy Output Voltage

With special careful design to minimize all contributions to the output voltage error, the LP2983 distinguishes

itself as a very high-accuracy output voltage micropower LDO. This includes a tight initial tolerance (typically

1.5% at 50 mA, 25°C junction temperature; also available in A grade with an accuracy of 1% under the same

conditions), extremely good line regulation (0.01%/V typical), and a very low output-voltage temperature

coefficient, making the part an ideal low-power voltage reference.

7.3.2 Low Ground Current

The LP2983 device uses a vertical PNP process which allows for quiescent currents that are considerably lower

than those associated with traditional lateral PNP regulators, typically 825

μA at 150-mA load and 75 μA at 1-mA

load.