1FEATURES
2• Wide Input Voltage Range: 3 V to 28 V
• Output Voltage Range: 0.6 V to 2.6 V
• Wide Output Load Range: 0 to 20A+
• Built-in 0.5% 0.6 V Reference
• D-CAP™ Mode with 100-ns Load Step
Response
• Adaptive On Time Control Architecture with
Fixed 340kHz Operation
• Dynamic Output Voltage Change Capability
• 4700 ppm/°C RDS(on) Current Sensing
• Internal 0.9-ms Voltage Servo Softstart
• Pre-Charged Start-up Capability
• Built-in Output Discharge
• Power Good Output
• Integrated Boost Switch
• Built-in OVP/UVP/OCP
• Thermal Shutdown (Non-latch)
• SON-10 (DSC) Package

APPLICATIONS
• Notebook Computers
• I/O Supplies
• System Power Supplies

DESCRIPTION
The TPS51217 is a small-sized single buck controller
with adaptive on-time D-CAP™ mode. The device is
suitable for low output voltage, high current, PC
system power rail and similar point-of-load (POL)
power supply in digital consumer products. A small
package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency
minimize design effort required for new designs. The
skip-mode at light load condition, strong gate drivers
and low-side FET RDS(on) current sensing supports
low-loss and high efficiency, over a broad load range.
The TRAN pin provides freedom of masking
overvoltage protection, undervoltage protection and
power-good signal during the transition period of
dynamic output voltage change for modern GPU
power supply applications. The conversion input voltage which is the high-side FET drain voltage
ranges from 3 V to 28 V and the output voltage
ranges from 0.6 V to 2.6 V. The device requires an
external 5-V supply. The TPS51217 is available in a
10-pin SON package specified from –40°C to 85°C.