Power Switch ICs

Power switch ICs (integrated circuits) are electronic components that control the power for another device within the circuit. They are used to enable or disable a power rail. Power switches are often used to control the current to a USB connector to prevent short-circuiting. These switches provide protection for circuits which may experience overload or high operating temperatures. Load switches are active whenever the power is switched on and therefore offer low leakage currents. Load switches are often used instead of a MOSFET as they offer additional protection from a smaller package.

When choosing a power switch it is important to consider the current limit levels. These levels can be fixed or adjustable depending on the device. Power switch ICs come in a standard semiconductor package, such as a SOT-21, SSOP and PDIP.

Where are they used?

  • USB ports (e.g. USB-C)
  • Desktop computers
  • Docking stations
  • General switching or linear applications

High-side and Low-side Switches

High-side switches sit between the positive power line and the load. Low-side switches sit between the load and the ground. High-side switches are more commonly used in heavy-load applications where a short circuit is more likely at the ground. Low-side switches are often cheaper and ideal for when load is controlled through a high-speed PWM. There are also H-bridge switch ICs which require both high-side and low-side switches.

What is an Intelligent Power Switch (IPS)?

Intelligent power switches are ICs that are largely used in the automotive applications. They also play a big role in the “Smart Home” products. An Intelligent power switch combines multiple actions into a single process. They are used in PAC (Programmable Automation Controller), CNC (Computer Numerical Control) & PLC (Programmable Logic Controller), robotics, agricultural systems, security systems & used in green energy, like wind turbines.


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Description Price Power Switch Topology Power Switch Type Switch On Resistance Number of Channels Maximum Operating Supply Voltage Maximum Operating Current Number of Outputs Number of Inputs Power Rating Protection Features Mounting Type Package Type Pin Count Maximum Operating Temperature
RS Stock No. 825-6765
Mfr. Part No.TPS2561DRCT
HK$13.40
Each (In a Pack of 5)
units
- Distribution 70mΩ - 6.5 V 2.5A 2 - 2.403W - Surface Mount SON 10 +85 °C
RS Stock No. 162-8784
Mfr. Part No.TPS2561DRCT
HK$7.704
Each (On a Reel of 250)
units
- Distribution 70mΩ - 6.5 V 2.5A 2 - 2.403W - Surface Mount SON 10 +85 °C
RS Stock No. 921-5150
Mfr. Part No.TPS22945DCKR
HK$4.158
Each (On a Reel of 3000)
units
- - - - 5.5 V 0.15A 1 - - - Surface Mount SC-70 5 +85 °C
RS Stock No. 709-9167
Mfr. Part No.TPS22945DCKR
HK$9.524
Each (In a Pack of 5)
units
- - - - 5.5 V 0.15A 1 - - - Surface Mount SC-70 5 +85 °C
RS Stock No. 162-7918
Mfr. Part No.TPS2511DGN
HK$14.102
Each (In a Tube of 80)
units
High Side - 120mΩ - 5.5 V 3330mA 1 - - - Surface Mount MSOP 8 +85 °C
RS Stock No. 812-0408
Mfr. Part No.TPS2511DGN
HK$14.91
Each (In a Pack of 10)
units
High Side - 120mΩ - 5.5 V 3330mA 1 - - - Surface Mount MSOP 8 +85 °C
RS Stock No. 162-7905
Mfr. Part No.TPS22929DDBVT
HK$4.11
Each (On a Reel of 250)
units
- Load Management 200mΩ - 5.5 V 1.8A 1 - 463mW - Surface Mount SOT-23 6 +85 °C
RS Stock No. 812-0332
Mfr. Part No.TPS22929DDBVT
HK$6.791
Each (In a Pack of 25)
units
- Load Management 200mΩ - 5.5 V 1.8A 1 - 463mW - Surface Mount SOT-23 6 +85 °C
RS Stock No. 179-1680
Mfr. Part No.TPS2080D
HK$16.316
Each (In a Tube of 75)
units
- - - - 5.5 V 1A 2 2 - - Surface Mount SOIC 8 +85 °C
RS Stock No. 660-8007
Mfr. Part No.TPS2080D
HK$19.57
Each (In a Pack of 5)
units
- - - - 5.5 V 1A 2 2 - - Surface Mount SOIC 8 +85 °C
RS Stock No. 662-2394
Mfr. Part No.TPS2105DBVT
HK$18.416
Each (In a Pack of 5)
units
- - - - 5.5 V 500mA 1 2 - - Surface Mount SOT-23 5 +85 °C
RS Stock No. 665-8832
Mfr. Part No.TPS2046BD
HK$19.21
Each (In a Pack of 5)
units
- - - - 5.5 V 0.7A 2 1 - - Surface Mount SOIC 8 +85 °C
RS Stock No. 162-7558
Mfr. Part No.TPS2046BD
HK$15.728
Each (In a Tube of 75)
units
- - - - 5.5 V 0.7A 2 1 - - Surface Mount SOIC 8 +85 °C
RS Stock No. 162-7144
Mfr. Part No.TPS2105DBVT
HK$10.928
Each (On a Reel of 250)
units
- - - - 5.5 V 500mA 1 2 - - Surface Mount SOT-23 5 +85 °C
RS Stock No. 133-0740
Mfr. Part No.TPS259261DRCT
HK$13.566
Each (In a Pack of 5)
units
- - - - 13.8 V 5.7A 3 3 - - Surface Mount VSON 10 +85 °C
RS Stock No. 812-0256
Mfr. Part No.TPS2041CDBVT
HK$5.531
Each (In a Pack of 10)
units
- Distribution 154mΩ - 5.5 V 0.5A 1 - - - Surface Mount SOT-23 5 +85 °C
RS Stock No. 812-0357
Mfr. Part No.TPS22946YZPR
HK$7.601
Each (On a Tape of 10)
units
- Load Management - 5.5 V - 1 - 810.63mW - Surface Mount DSBGA 6 +85 °C
RS Stock No. 920-3403
Mfr. Part No.TPS2044BD
HK$20.981
Each (In a Tube of 40)
units
High Side USB Power 70mΩ - 5.5 V 1.25A 8 - - - Surface Mount SOIC 16 +85 °C
RS Stock No. 812-0402
Mfr. Part No.TPS2552DRVT
HK$9.692
Each (In a Pack of 5)
units
- Distribution 150mΩ - 6.5 V 1.5A 1 - 1.33W - Surface Mount SON 6 +85 °C
RS Stock No. 168-5067
Mfr. Part No.TPS259261DRCT
HK$7.323
Each (On a Reel of 250)
units
- - - - 13.8 V 5.7A 3 3 - - Surface Mount VSON 10 +85 °C