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TPS22959

ACTIVE

5.5-V, 15-A, 4.4-mΩ load switch with output discharge

Product details

Number of channels 1 Vin (min) (V) 0.8 Vin (max) (V) 5.5 Imax (A) 15 Ron (typ) (mΩ) 4.4 Shutdown current (ISD) (typ) (µA) 1.1 Quiescent current (Iq) (typ) (µA) 20.4 Soft start Fixed Rise Time Current limit type None Features Quick output discharge Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Inrush current control
Number of channels 1 Vin (min) (V) 0.8 Vin (max) (V) 5.5 Imax (A) 15 Ron (typ) (mΩ) 4.4 Shutdown current (ISD) (typ) (µA) 1.1 Quiescent current (Iq) (typ) (µA) 20.4 Soft start Fixed Rise Time Current limit type None Features Quick output discharge Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Inrush current control
WSON (DNY) 8 9 mm² 3 x 3
  • Integrated Single Channel Load Switch
  • VBIAS Voltage Range: 2.5 V to 5.5 V
  • VIN Voltage Range: 0.8 V to 5.5 V
  • Ultra Low RON Resistance
    • RON = 4.4 mΩ at VIN = 5 V (VBIAS = 5 V)
  • 15 A Maximum Continuous Switch Current
  • Low Quiescent Current
    • (20 µA for VBIAS = 5 V)
  • Low Shutdown Current
    • (1 µA for VBIAS = 5 V)
  • Low Control Input Threshold Enables Use of 1.2 V or Higher GPIO
  • Controlled and Fixed Slew Rate Across VBIAS and VIN
    • tR = 2663 µs at VIN = 5 V (VBIAS = 5 V)
  • Quick Output Discharge (QOD)
  • SON 8-Pin Package with Thermal Pad
  • ESD Performance Tested per JESD 22
    • 2-kV Human-Body Model (HBM)
    • 1-kV Charged-Device Model (CDM)
  • Integrated Single Channel Load Switch
  • VBIAS Voltage Range: 2.5 V to 5.5 V
  • VIN Voltage Range: 0.8 V to 5.5 V
  • Ultra Low RON Resistance
    • RON = 4.4 mΩ at VIN = 5 V (VBIAS = 5 V)
  • 15 A Maximum Continuous Switch Current
  • Low Quiescent Current
    • (20 µA for VBIAS = 5 V)
  • Low Shutdown Current
    • (1 µA for VBIAS = 5 V)
  • Low Control Input Threshold Enables Use of 1.2 V or Higher GPIO
  • Controlled and Fixed Slew Rate Across VBIAS and VIN
    • tR = 2663 µs at VIN = 5 V (VBIAS = 5 V)
  • Quick Output Discharge (QOD)
  • SON 8-Pin Package with Thermal Pad
  • ESD Performance Tested per JESD 22
    • 2-kV Human-Body Model (HBM)
    • 1-kV Charged-Device Model (CDM)

The TPS22959 is a small, ultra-low RON, single channel load switch with controlled turn on. The device contains an N-channel MOSFET that can operate over an input voltage range of 0.8 V to 5.5 V and supports a maximum continuous current of 15 A.

The combination of ultra-low RON and high current capability of the device makes it ideal for driving processor rails with very tight voltage dropout tolerances. The controlled rise time of the device greatly reduces inrush current caused by large bulk load capacitances, thereby reducing or eliminating voltage droop on the power supply. The switch can be independently controlled via the ON pin, which is capable of interfacing directly with low-voltage control signals originating from microcontrollers or low voltage discrete logic. The device further reduces the total solution size by integrating a 224-Ω pull-down resistor for quick output discharge (QOD) when the switch is turned off.

The TPS22959 is available in a small 3.00 mm x 3.00 mm WSON-8 package (DNY). The DNY package integrates a thermal pad which allows for high power dissipation in high current and high temperature applications. The device is characterized for operation over the free-air temperature range of –40°C to 105°C.

The TPS22959 is a small, ultra-low RON, single channel load switch with controlled turn on. The device contains an N-channel MOSFET that can operate over an input voltage range of 0.8 V to 5.5 V and supports a maximum continuous current of 15 A.

The combination of ultra-low RON and high current capability of the device makes it ideal for driving processor rails with very tight voltage dropout tolerances. The controlled rise time of the device greatly reduces inrush current caused by large bulk load capacitances, thereby reducing or eliminating voltage droop on the power supply. The switch can be independently controlled via the ON pin, which is capable of interfacing directly with low-voltage control signals originating from microcontrollers or low voltage discrete logic. The device further reduces the total solution size by integrating a 224-Ω pull-down resistor for quick output discharge (QOD) when the switch is turned off.

The TPS22959 is available in a small 3.00 mm x 3.00 mm WSON-8 package (DNY). The DNY package integrates a thermal pad which allows for high power dissipation in high current and high temperature applications. The device is characterized for operation over the free-air temperature range of –40°C to 105°C.

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Technical documentation

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Type Title Date
* Data sheet TPS22959 5.5-V, 15-A, 4.4-mΩ On-Resistance Load Switch datasheet (Rev. B) PDF | HTML 27 Jul 2015
Application note Load Switch Thermal Considerations (Rev. A) 11 Oct 2018
Application note Basics of Load Switches (Rev. A) 05 Sep 2018
Application note Selecting a Load Switch to Replace a Discrete Solution 30 Apr 2017
Application note Timing of Load Switches 27 Apr 2017
Application note Managing Inrush Current (Rev. A) 28 May 2015
EVM User's guide TPS22959EVM-079 15 A Load Switch IC 21 Jul 2014

Design & development

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

Evaluation board

TPS22959EVM-079 — TPS22959 Evaluation Module

The TPS22959EVM is a two sided PCB containing the TPS22959 load switch device. The VIN and VOUT connections to the device and the PCB layout routing are capable of handling high continuous currents and provide a low resistance pathway into and out of the device under test. Test point connections (...)

User guide: PDF
Not available on TI.com
Simulation model

TPS22959 Unencrypted PSpice Transient Model Package (Rev. A)

SLVMAD0A.ZIP (73 KB) - PSpice 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 (...)
Reference designs

TIDA-00514 — Load Switches for Power MUXing & Reverse Current Blocking Reference Design

In systems that can be powered from multiple power sources, achieving a seamless transition when switching between sources can be challenging, especially when it is also neccesary to block reverse current flow. This reference design demonstrates how two load switches can be used to MUX power (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00513 — Parallel Load Switches for Higher Output Current & Reduced ON-Resistance Reference Design

The TIDA-00513 demonstrates two examples of paralleling load switches. The functionality of existing load switches can be expanded by placing multiple channels in a parallel configuration.
The first uses both channels of the dual channel TPS22966 for a total output current of 10A.
The second uses (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
WSON (DNY) 8 Ultra Librarian

Ordering & quality

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