1 Features
• Stable with no output capacitor or any value or
type of capacitor
• Input voltage range: 1.7V to 5.5V
• Ultra-low dropout voltage: 40mV typical at 250mA
• Excellent load transient response—with or without
optional output capacitor
• NMOS topology provides low reverse leakage
current
• Low noise: 30μVRMS typical (10kHz to 100kHz)
• 0.5% initial accuracy
• 1% overall accuracy (line, load, and temperature)
• Less than 1μA maximum IQ in shutdown mode
• Thermal shutdown and specified min and max
current limit protection
• Available in multiple output voltage versions:
– Fixed outputs of 1.2V to 5V
– Adjustable outputs from 1.2V to 5.5V
– Custom outputs available

2 Applications
• Portable and battery-powered equipment
• Post-regulation for switching supplies
• Noise-sensitive circuitry such as VCOs
• Point of load regulation for DSPs, FPGAs, ASICs,
and microprocessors

3 Description
The TPS732 low-dropout (LDO) voltage regulator
uses an NMOS pass transistor in a voltage-follower
configuration. This topology is stable using output
capacitors with low equivalent series resistance
(ESR), and even allows operation without a capacitor.
The device also provides high reverse blockage (low
reverse current) and ground pin current that is nearly
constant over all values of output current.
The TPS732 uses an advanced BiCMOS process
to yield high precision while delivering very low
dropout voltages and low ground pin current. Current
consumption, when not enabled, is less than 1μA and
designed for portable applications. The extremely low
output noise (30μVRMS with 0.1μF CNR) is designed
for powering VCOs. This device is protected by
thermal shutdown and foldback current limit.