text.skipToContent text.skipToNavigation


1.8V to 28V Input Sync Step Down Controller w/ DCAP™ Mode, Optimized for Light Load Efficiency


Package | PIN: PW | 14
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $3.33
10-24 $3.00
25-99 $2.79
100-249 $2.44
250-499 $2.29
500-749 $1.95
750-999 $1.64
1000+ $1.57


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

All other trademarks are the property of their respective owners

Texas Instruments  TPS51117PW

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 RDS(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.