LP3992

www.ti.com

SNVS192C – OCTOBER 2002 – REVISED NOVEMBER 2015

8.3 Feature Description

8.3.1 Shutdown and Enable

The LP3992 may be switched ON or OFF by a logic input at the EN pin. A high voltage at the EN pin turns the

device on. A low voltage on the EN pin will disable the regulator, and will activate the fast turnoff circuitry to

discharge the output capacitance. When the regulator is disabled the device typically consumes 3 nA.

permanently on.

To ensure proper operation, the signal source used to drive the EN input must be able to swing above and below

8.3.2 Fast Turnon and Turnoff

The controlled shutdown feature of the device provides a fast turn off by discharging the output capacitor via an

control circuitry within the reference block allowing a very fast ramp of the output voltage to reach the target

voltage.

8.4 Device Functional Modes

8.4.1 Enable Operation

The LP3992 may be switched ON or OFF by a logic input at the EN pin. A high voltage at the EN pin turns the

device on. A low voltage on the EN pin will disable the regulator, and will activate the fast turnoff circuitry to

discharge the output capacitance. When the regulator is disabled the device typically consumes 3 nA.

permanently on.

To ensure proper operation, the signal source used to drive the EN input must be able to swing above and below

Copyright © 2002–2015, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Links: LP3992