Thermal

Shutdown

Current

Limit

UVLO

Bandgap

IN

EN

OUT

LOGIC

GND

TLV700xxSeries

TLV700

www.ti.com

SLVSA00E – SEPTEMBER 2009 – REVISED APRIL 2015

7 Detailed Description

7.1 Overview

The TLV700 series of LDO linear regulators are low quiescent current devices with excellent line and load

transient performance. These LDOs are designed for power-sensitive applications. A precision bandgap and

error amplifier provides overall 2% accuracy. Low output noise, very high PSRR, and low dropout voltage make

this series of devices ideal for most battery-operated handheld equipment. All device versions have integrated

thermal shutdown, current limit, and undervoltage lockout (UVLO).

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Internal Current Limit

The TLV700 internal current limit helps to protect the regulator during fault conditions. During current limit, the

output sources a fixed amount of current that is largely independent of the output voltage. In such a case, the

internal thermal shutdown circuit. If the fault condition continues, the device cycles between current limit and

thermal shutdown. See Thermal Protection for more details.

The PMOS pass element in the TLV700 has a built-in body diode that conducts current when the voltage at OUT

exceeds the voltage at IN. This current is not limited, so if extended reverse voltage operation is anticipated,

external limiting to 5% of the rated output current is recommended.

7.3.2 Shutdown

The enable pin (EN) is active high. The device is enabled when voltage at EN pin goes above 0.9 V. The device

is turned off when the EN pin is held at less than 0.4 V. When shutdown capability is not required, EN can be

connected to the IN pin.

Copyright © 2009–2015, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Links: TLV700