1 Features
• Stable with 1-μF or larger ceramic output capacitor
• Input voltage range: 2.2 V to 5.5 V
• Ultra-low dropout voltage: 130 mV typical at 1 A
• Excellent load transient response—even with only
1-μF output capacitor
• NMOS topology delivers low reverse leakage
current
• Initial accuracy: 1%
• Overall accuracy over line, load, and temperature:
3%
• Less than 20 nA typical IQ in shutdown mode
• Thermal shutdown and current limit for fault
protection
• Available in multiple output voltage versions:
– Adjustable output: 1.20 V to 5.5 V
– Custom outputs available using factory
package-level programming
• M3-suffix devices are Advance Information only

2 Applications
• Point-of-load regulation for DSPs, FPGAs, ASICs,
and microprocessors
• Post-regulation for switching supplies
• Portable and battery-powered equipment

3 Description
The TPS737 linear low-dropout (LDO) voltage
regulator uses an NMOS pass transistor in a voltagefollower
configuration. This topology is relatively
insensitive to the output capacitor value and ESR,
allowing for a wide variety of load configurations. Load
transient response is excellent, even with a small 1-μF
ceramic output capacitor. The NMOS topology also
allows for very low dropout.
The TPS737 uses an advanced BiCMOS process to
yield high precision while delivering very low dropout
voltages and low ground pin current. Part numbers
with the M3 suffix use an updated design on the
latest TI process technology. Current consumption,
when not enabled, is less than 20 nA and is designed
for portable applications. This device is protected by
thermal shutdown and foldback current limit.
For applications that require higher output voltage
accuracy, consider TI's TPS7A37 1% overall
accuracy, 1-A low-dropout voltage regulator.