_

+

Thermal

Shutdown

Current

Sense

R1

R2

GND

EN

SHUTDOWN

UVLO

ILIM

250 kW

NR

QuickStart

Bandgap

Reference

1.22 V

UVLO

2.45 V

R2 = 40 kW

IN

IN

OUT

_

+

Thermal

Shutdown

Bandgap

Reference

1.22 V

Current

Sense

R2

GND

EN

SHUTDOWN

UVLO

ILIM

External to

the Device

R1

UVLO

2.45 V

250 kW

NR

FB

59 k

QuickStart

OUT

IN

IN

11

TPS793

www.ti.com

SLVS348L – JULY 2001 – REVISED MAY 2015

Product Folder Links: TPS793

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Copyright © 2001–2015, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TPS793 family of LDO regulators has been optimized for use in noise-sensitive battery-operated equipment.

The device features extremely low dropout voltages, high PSRR, ultralow output noise, low quiescent current

(170 μA typically), and enable-input to reduce supply currents to less than 1 μA when the regulator is turned off.

7.2 Functional Block Diagrams

Figure 21. TPS79301 Block Diagram (Adjustable Version)

Figure 22. TPS793 Block Diagram (Fixed Version)