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 R_DS(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.

• 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

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 28
• Vout (Min) (V)
• 0.6
• Vout (Max) (V)
• 2.6
• Iout (Max) (A)
• 20
• Iq (Typ) (uA)
• 320
• Switching frequency (Min) (kHz)
• 312
• Switching frequency (Max) (kHz)
• 368
• Features
• Dynamic Voltage Scaling, Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

TPS51217的完整型号有：TPS51217DSCR、TPS51217DSCT，以下是这些产品的关键参数及官网采购报价：

TPS51217DSCR，工作温度：-40 to 85，封装：WSON (DSC)-10，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS51217DSCR的批量USD价格：1.307（1000+）

TPS51217DSCT，工作温度：-40 to 85，封装：WSON (DSC)-10，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS51217DSCT的批量USD价格：1.568（1000+）

TPS51217 PSpice Transient Model (Rev. B)

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