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.