LP3961, LP3964

SNVS056J – MAY 2000 – REVISED JUNE 2015

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7 Detailed Description

7.1 Overview

The LP3961/LP3964 are a series of ultra-low dropout linear regulators. Fixed output products have output

voltage options from 1.2 V to 5 V, adjustable output voltage is only available for LP3964. These regulators can

provide maximum 800-mA load current. The device can operate under extremely low dropout conditions.

The LP3961 has an ERROR flag pin, this pin will go low when the output voltage drops 10% below nominal

value. The LP3964 (fixed output products) provides a SENSE pin. The SENSE pin can improve regulation at

remote loads. The LP3961, LP3964 also provide short-circuit protection and reverse current path. The devices

can be operated with shutdown (SD) pin control.

7.2 Functional Block Diagram

Figure 17. LP3961 Block Diagram

Figure 18. LP3964 Block Diagram

10

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Product Folder Links: LP3961 LP3964