1 Features
• Input voltage range: 0.8V to 5.5V
• Soft-start (SS) pin provides a linear start-up with
ramp time set by external capacitor
• 1% accuracy over line, load, and temperature
• Supports input voltages as low as 0.8V with
external bias supply
• Adjustable output (0.8V to 3.6V)
• Ultra-Low Dropout:
– 60mV (legacy chip) at 1.5A (typical)
– 55mV (new chip) at 1.5A (typical)
• Stable with any output capacitor ≥ 2.2μF (new
chip)
• Stable with any or no output capacitor (legacy
chip)
• Excellent transient response
• Open-drain power-good
• Active high enable

2 Applications
• Network attached storage - enterprise
• Rack servers
• Network interface cards (NIC)
• Merchant network and server PSU

3 Description
The TPS742 series of low-dropout (LDO) linear
regulators provide an easy-to-use, robust powermanagement
solution for a wide variety of
applications. User-programmable soft-start minimizes
stress on the input power source by reducing
capacitive inrush current on start-up. The soft-start is
monotonic and well suited for powering many different
types of processors and ASICs. The enable input
and power-good output allow easy sequencing with
external regulators. This complete flexibility permits
the user to configure a solution that meets the
sequencing requirements of FPGAs, DSPs, and other
applications with special start-up requirements.
A precision reference and error amplifier deliver 1%
accuracy over load, line, temperature, and process.
The device is is stable with any type of capacitor
greater than or equal to 2.2μF (new chip), and is fully
specified from –40°C to 125°C.