The TPS51117 device is a cost-effective, synchronous buck controller for POL voltage regulation in notebook PC applications. The controller is dedicated for the operation of the Adaptive On-Time D-CAP mode. This mode provides ease-of-use, low external component count, and fast transient response. Auto-skip mode for high efficiency down to the milliampere load range, or PWM-only mode for low-noise operation is selectable.

The current-sensing scheme for positive overcurrent and negative overcurrent protection is loss-less low-side R_DS(on) sensing plus temperature compensation. The device receives a 5-V (4.5 V to 5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.

The TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified from –40°C to 85°C.

• High Efficiency, Low Power Consumption, 4.5-μA Typical Shutdown Current
• Fixed Frequency Emulated On-Time Control, Adjustable from 100 kHz to 550 kHz
• D-CAP? Mode With 100-ns Load Step Response
• < 1% Initial Reference Accuracy
• Output Voltage Range: 0.75 V to 5.5 V
• Wide Input Voltage Range: 1.8 V to 28 V
• Selectable Auto-Skip/PWM-Only Operation
• Temperature Compensated (4500 ppm/°C) Low-Side RDS(on) Overcurrent Sensing
• Negative Overcurrent Limit
• Integrated Boost Diode
• Integrated OVP/UVP and Thermal Shutdown
• Powergood Signal
• Internal 1.2-ms Voltage Soft-Start
• Integrated Output Discharge (Soft-Stop)
• APPLICATIONS
  • Notebook Computers
  • I/O Supplies
  • System Power Supplies

All other trademarks are the property of their respective owners

• Vin (Min) (V)
• 1.8
• Vin (Max) (V)
• 28
• Vout (Min) (V)
• 0.76
• Vout (Max) (V)
• 5.5
• Iout (Max) (A)
• 10
• Iq (Typ) (uA)
• 400
• Switching frequency (Min) (kHz)
• 100
• Switching frequency (Max) (kHz)
• 550
• Features
• Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification
• Regulated outputs (#)
• 1
• Number of phases
• 1
• Rating
• Catalog

TPS51117的完整型号有：TPS51117PW、TPS51117PWR、TPS51117RGYR、TPS51117RGYT，以下是这些产品的关键参数及官网采购报价：

TPS51117PW，工作温度：-40 to 85，封装：TSSOP (PW)-14，包装数量MPQ：90个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS51117PW的批量USD价格：.672（1000+）

TPS51117PWR，工作温度：-40 to 85，封装：TSSOP (PW)-14，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS51117PWR的批量USD价格：.569（1000+）

TPS51117RGYR，工作温度：-40 to 85，封装：VQFN (RGY)-14，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TPS51117RGYR的批量USD价格：.569（1000+）

TPS51117RGYT，工作温度：-40 to 85，封装：VQFN (RGY)-14，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TPS51117RGYT的批量USD价格：.672（1000+）

TPS51117 Unencrypted PSpice Transient Model Package (Rev. D)

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