Product details

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 Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
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 Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
TSSOP (PW) 14 32 mm² 5 x 6.4 VQFN (RGY) 14 12 mm² 3.5 x 3.5
  • 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

  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS51117 Single Synchronous Step-Down Controller datasheet (Rev. C) 15 May 2015
Technical article Embedded Computers with TI Power in a myriad of applications 15 May 2010
User guide High Performance Synchronous Buck EVM Using the TPS51117 (Rev. A) 01 Apr 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

TPS51117 Unencrypted PSpice Transient Model Package (Rev. D)

SLVJ001D.ZIP (43 KB) - PSpice Model
Simulation model

TPS51117 TINA-TI Transient Reference Design (Rev. C)

SLVJ002C.TSC (403 KB) - TINA-TI Reference Design
Simulation model

TPS51117 TINA-TI Transient Spice Model (Rev. A)

SLVM020A.ZIP (35 KB) - TINA-TI Spice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
TSSOP (PW) 14 View options
VQFN (RGY) 14 View options

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