1 Features
1• Input Voltage Range: 1.5 V to 6.0 V
• Adjustable Output Voltage:
– 0.55 V to 5.5 V
• Very Low Dropout:
– 225 mV (max) at 1 A (3.3 VOUT)
• High Output Accuracy:
– 0.7%, Typical
– 1%, Maximum Over Temperature (85°C)
• Open-Drain Power-Good Output
• Power-Good Rising Delay:
– TPS746: 165 μs
– TPS746B: 5 ms
• IQ: 25 μA (Typical)
• Built-In Soft-Start With Monotonic VOUT Rise
• Package:
– 2-mm × 2-mm 6-Pin WSON (DRV)
• Active Output Discharge

2 Applications
• Set-Top Boxes, Gaming Consoles
• Home Theater and Entertainment
• Desktops, Notebooks, Ultrabooks
• Printers
• Servers
• Thermostat and Lighting Controls
• Electronic Point of Sale (EPOS)

3 Description
The TPS746 is an adjustable 1-A low-dropout (LDO)
regulator with power-good functionality. This device is
available in a small, 6-pin, 2-mm × 2-mm WSON
package and consumes very low quiescent current
and provides fast line and load transient performance.
The TPS746 features an ultra-low dropout of 225 mV
at 1 A that can help improve the power efficiency of
the system.
The TPS746 is optimized for a wide variety of
applications by supporting an input voltage range
from 1.5 V to 6.0 V and an externally adjustable
output range of 0.55 V to 5.5 V. The low output
voltage enables this LDO to power the modern
microcontrollers with lower core voltages.
Additionally, the TPS746 has a low IQ with enable
functionality to minimize standby power. This device
features an internal soft-start to lower the inrush
current, which provides a controlled voltage to the
load and minimizes the input voltage drop during start
up.
The TPS746 has a power-good (PG) output that
monitors the voltage at the feedback pin to indicate
the status of the output voltage. The EN input and PG
output can be used for sequencing multiple power
sources in the system.
The TPS746 is stable with small ceramic output
capacitors, allowing for a small overall solution size.
A precision band-gap and error amplifier provides a
high accuracy of 0.7% max at 25ºC and 1% max over
temperature (85ºC). This device includes integrated
thermal shutdown, current limit, and undervoltage
lockout (UVLO) features. The TPS746 has an internal
foldback current limit that helps reduce the thermal
dissipation during short-circuit events.