1FEATURES
2• Integrated FETs Converter w/TI Proprietary
D-CAP+™ Mode Architecture
• Minimum External Components Count
• Support all MLCC Output Capacitor and
SP/POSCAP
• Auto-Skip Mode and Ripple Reduction Mode
• Optimized Efficiency at Light and Heavy Loads
• Selectable 800-kHz, 1-MHz, 1.2-MHz and
1.5-MHz Frequency
• Up to 6.0-V Conversion Voltage Range
• Adjustable Output Voltage Range From 0.6 V
to 2 V
• Small 3.5 mm × 4 mm, 20-Pin QFN Package

APPLICATIONS
• Low-Voltage Applications Stepping Down from
5-V or 3.3-V Rail

DESCRIPTION
The TPS51317 is a fully integrated synchronous buck
regulator employing D-CAP+™ mode architechture. It
is used for 3.3-V and 5-V step-down systems where
space is a consideration, high-performance and
optimized component count are required. The
TPS51317 features four switching frequency settings
(up to 1.5 MHz), synchronous operation in SKIP,
droop support, external tracking support, pre-bias
startup, output soft discharge, integrated bootstrap
switch, power good function, enable function and
complete protection functions, and both output
ceramic and SP/POS capacitor support. It supports
supply and conversion voltages up to 6.0 V, and
output voltages adjustable from 0.6 V to 2.0V. The
TPS51317 is available in the 3.5 mm × 4 mm 20-pin
QFN package (Green RoHs compliant and Pb free)
and is specified from -40°C to 85°C.