TPS73233DBVT.A datasheet(16/47 Pages) TI2

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6 Detailed Description

6.1 Overview

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

voltages down to 1.2V while sourcing up to 250mA of load current. This linear regulator uses an NMOS

pass transistor with an integrated 4MHz charge pump to provide a dropout voltage of less than 150mV at full

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

Furthermore, the TPS732 does not require any output capacitor for stability. The increased insensitivity to the

output capacitor value and type makes this linear regulator designed for powering a load where the effective

capacitance is unknown.

The TPS732 also features a noise-reduction (NR) pin that allows for additional reduction of the output noise.

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

noise is 12.75µVRMS. The low noise output featured by the TPS732 makes the device designed for powering

VCOs or any other noise-sensitive load.

6.2 Functional Block Diagrams

Servo

Error

Amp

Ref

27kW

8kW

Current

Limit

Thermal

Protection

Bandgap

OUT

GND

1 + R2 = 80kW

4MHz

Charge Pump

Figure 6-1. Fixed-Voltage Version

TPS732

SBVS037R – AUGUST 2003 – REVISED MAY 2025

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