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.