Servo

Error

Amp

Ref

27 kW

8 kW

Current

Limit

Thermal

Protection

Bandgap

NR

OUT

R

1

R

2

EN

GND

IN

R

4-MHz

Charge Pump

Copyright © 2016, Texas Instruments Incorporated

11

TPS73719-Q1, TPS73733-Q1

www.ti.com

SBVS123A – DECEMBER 2008 – REVISED JULY 2016

Product Folder Links: TPS73719-Q1 TPS73733-Q1

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Copyright © 2008–2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TPS737xx-Q1 belongs to a family of new generation LDO regulators that use an NMOS pass transistor to

achieve ultra-low-dropout performance, reverse current blockage, and freedom from output capacitor constraints.

These features combined with an enable input make the TPS737xx-Q1 ideal for portable applications. This

regulator family offers a wide selection of fixed output voltage versions and an adjustable output version. All

versions have thermal and over-current protection, including foldback current limit.

Table 1. Standard 1% Resistor Values for Common

Output Voltages

1.2 V

Short

Open

1.5 V

23.2 kΩ

95.3 kΩ

1.8 V

28.kΩ

56.2 kΩ

2.5 V

39.2 kΩ

36.5 kΩ

2.8 V

44.2 kΩ

33.2 kΩ

3 V

46.4 kΩ

33.2 kΩ

3.3 V

52.3 kΩ

30.1 kΩ

7.2 Functional Block Diagrams

Figure 29. Fixed Voltage Version