1 Features
• 4.5-V to 24-V input voltage range
• 0.6-V to 5.5-V output voltage range
• Integrated 22-mΩ and 11-mΩ MOSFETs
• Support 8-A continuous IOUT
• 84-μA low quiescent current
• ±1% reference voltage (0.6 V) at 25°C
• ±1.5% reference voltage (0.6 V) at –40°C to 125°C
• 600-kHz switching frequency
• D-CAP3™ control mode for fast transient response
• Supports POSCAP and all MLCC output capacitor
• Adjustable soft start and internal 1-ms soft start
• Selectable PSM and Out-of-Audio™ (OOA) mode
under light load and supports on-the-fly change
• Large duty operation support
• 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 TPS51386 is a monolithic, 8-A, synchronous
buck converter with adaptive on-time D-CAP3 control
mode. Integrated low RDS(on) power MOSFETs enable
high efficiency and offer ease-of-use with minimum
external component count for space-constrained
power systems. Features include an accurate
reference voltage, fast load transient response, autoskip
mode operation for light load efficiency, OOA light
load operation with > 25-kHz switching frequency, DCAP3
control mode with good line, load regulation,
and does not require external compensation.
The TPS51386 provides complete protection OVP,
UVP, OCP, OTP, and UVLO. The device is a
combined power-good signal and output discharge
function.
The TPS51386 supports both internal and external
soft-start time option. The device has the internal
fixed soft-start time 1 ms. If the application needs
longer soft-start time, the external SS pin can be used
to achieve longer soft-start time by connecting the
external capacitor.
The TPS51386 are available in a thermally enhanced
12-pin QFN package and are designed to operate
from –40°C to 125°C junction temperature.