1 Features

• 4.5-V to 24-V input voltage range

• 3.36-V output voltage (TPS51383)

• 3.3-V, 100-mA LDO with switch over (TPS51383)

• 1.82-V output voltage (TPS51384)

• 1.8-V, 100-mA LDO with switch over (TPS51384)

• Integrated 22-mΩ and 11-mΩ MOSFETs

• Support 8-A continuous IOUT

• 80-μA low quiescent current

• ±1 reference voltage at 25°C

• ±1.5 reference voltage at -40°C to 125°C

• D-CAP3™ control mode for fast transient response

• Support POSCAP and all MLCC output capacitor

• Output discharge function

• Selectable PSM and OOA mode under light load

• Power-good indicator to monitor output voltage

• Latched output OV and UV protection

• Non-latched UVLO and OT protection

• Cycle-by-cycle overcurrent protection

• Built-in output discharge feature

• Small 2.00-mm × 3.00-mm HotRod™ QFN

package

2 Applications

• Notebook and PC computers

• Ultrabook, tablet computers

• TV and STB, point-of-load (POL)

• Distributed power systems

3 Description

The TPS51383 and TPS51384 are monolithic 8-A

synchronous buck converters with adaptive on-time

D-CAP3 control mode. Integrated low RDS(on) power

MOSFETs enable high efficiency and offer ease-ofuse

with minimum external component count for

space-constrained power systems. Features include

an accurate reference voltage, fast load transient

response, auto-skip mode operation for light load

efficiency, OOA light load operation with > 25-kHz

switching frequency, D-CAP3 control mode with good

line, load regulation, and does not require external

compensation.

The TPS51383 provides a fixed 3.36-V 8-AMAX output

and a 3.3-V, 100-mAMAX LDO output with switch-over

functionality. The TPS51384 provides a fixed 1.82-V

8-AMAX output and a 1.8-V, 100-mAMAX LDO with

switch-over functionality. Both the TPS51383 and

TPS51384 have ultra-low quiescent current function

for long battery life in system standby mode.

The TPS5138x are available in a thermally enhanced

12-pin QFN package and are designed to operate

from –40°C to 125°C junction temperature.