LP3871, LP3874

SNVS225H – FEBRUARY 2003 – REVISED JUNE 2015

www.ti.com

7 Detailed Description

7.1 Overview

The LP3871 and LP3874 linear regulators are designed to provide an ultra-low-dropout voltage with excellent

transient response and load/line regulation. For battery-powered always-on type applications, the very low

quiescent current of LP3871 and LP3874 in shutdown mode helps reduce battery drain. For applications where

load is not placed close to the regulator, LP3874 incorporates a voltage sense circuit to improve voltage

regulation at the point of load. The ERROR output pin of LP3871 can be used in the system to flag a low-voltage

condition.

7.2 Functional Block Diagrams

Figure 7. LP3871 Block Diagram

Figure 8. LP3874 Block Diagram

7.3 Feature Description

7.3.1 Shutdown (SD)

The LM3871 and LP3874 devices have a shutdown feature that turns the device off and reduces the quiescent

current to 10 nA, typical.

8

Submit Documentation Feedback

Copyright © 2003–2015, Texas Instruments Incorporated

Product Folder Links: LP3871 LP3874