Servo

Error

Amp

Ref

27kW

8kW

Current

Limit

Thermal

Protection

Bandgap

NR

OUT

R

1

R

2

EN

GND

IN

R

4MHz

Charge Pump

TPS732

SBVS037P – AUGUST 2003 – REVISED DECEMBER 2015

www.ti.com

7 Detailed Description

7.1 Overview

The TPS732 family of low-dropout linear regulators operates down to an input voltage of 1.7 V and supports

output voltages down to 1.2 V while sourcing up to 500 mA of load current. This linear regulator uses an NMOS

pass element with an integrated 4-MHz charge pump to provide a dropout voltage of less than 250 mV at full

load current. This unique architecture also permits stable regulation over a wide range of output capacitors. In

fact, the TPS732 family of devices does not require any output capacitor for stability. The increased insensitivity

to the output capacitor value and type makes this family of linear regulators an ideal choice when powering a

load where the effective capacitance is unknown.

The TPS732 family of devices also features a noise reduction (NR) pin that allows for additional reduction of the

output noise. With a noise reduction capacitor of 0.01 µF connected from the NR pin to GND, the TPS73215

device well-suited for powering VCOs or any other noise-sensitive load.

7.2 Functional Block Diagrams

Figure 29. Fixed-Voltage Version

12

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