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. 922-8294
Mfr. Part No.AP2151SG-13
HK$2.513
Each (On a Reel of 2500)
units
High Side High Side Switch 115mΩ - 5.5 V 500mA 2 - - - Surface Mount SOP 8 +85 °C
RS Stock No. 751-2957
Mfr. Part No.AP2151SG-13
HK$6.696
Each (In a Pack of 5)
units
High Side High Side Switch 115mΩ - 5.5 V 500mA 2 - - - Surface Mount SOP 8 +85 °C
RS Stock No. 921-0470
Mfr. Part No.AP2337SA-7
HK$2.814
Each (In a Pack of 30)
units
High Side - 170mΩ - 5.5 V 1.9A 1 - - - Surface Mount SOT-23 3 +85 °C
RS Stock No. 165-8353
Mfr. Part No.AP2337SA-7
HK$1.051
Each (On a Reel of 3000)
units
High Side - 170mΩ - 5.5 V 1.9A 1 - - - Surface Mount SOT-23 3 +85 °C
RS Stock No. 751-2982
Mfr. Part No.AP2280-1WG-7
HK$4.378
Each (In a Pack of 25)
units
High Side High Side Switch 250mΩ - 6 V 2A 1 - - - Surface Mount SOT-25 5 +85 °C
RS Stock No. 182-7158
Mfr. Part No.DML3009LDC-7
HK$5.221
Each (In a Pack of 25)
units
- Load 9mΩ - 13.5 V 20A 1 - - - Surface Mount V-DFN3030 12 +85 °C
RS Stock No. 146-4781
Mfr. Part No.AP22804BSN-7
HK$4.511
Each (In a Pack of 10)
units
High Side - 65mΩ - 2.4 V 3.3A 1 - - - Surface Mount U-DFN2020 5 + Tab +85 °C
RS Stock No. 169-0659
Mfr. Part No.AP2171WG-7
HK$1.303
Each (On a Reel of 3000)
units
High Side High Side Switch 115mΩ - 5.5 V 1A 1 - - - Surface Mount SOT-25 5 +85 °C
RS Stock No. 751-5385
Mfr. Part No.ZXMS6004DGTA
HK$10.784
Each (In a Pack of 5)
units
Low Side Low Side Switch 500mΩ - 5.5 V 1.3A 2 - - - Surface Mount SOT-223 3 + Tab +125 °C
RS Stock No. 165-8557
Mfr. Part No.AP2145SG-13
HK$4.011
Each (On a Reel of 2500)
units
Low Side - 140mΩ - 5.5 V 1A 2 - - - Surface Mount SOIC 8 +85 °C
RS Stock No. 823-3179
Mfr. Part No.ZXMS6001N3TA
HK$7.55
Each (In a Pack of 10)
units
- - 675mΩ - 6 V - 1 - 1.5W - Surface Mount SOT-223 3 + Tab +150 °C
RS Stock No. 921-0492
Mfr. Part No.AP2553AW6-7
HK$3.024
Each (In a Pack of 10)
units
High Side - 135mΩ - 5.5 V 2542mA 1 - - - Surface Mount SOT-26 6 +85 °C
RS Stock No. 122-0365
Mfr. Part No.AP2161WG-7
HK$1.492
Each (On a Reel of 3000)
units
High Side High Side Switch 115mΩ - 5.5 V 1A 1 - - - Surface Mount SOT-25 5 +85 °C
RS Stock No. 169-7369
Mfr. Part No.AP2401MP-13
HK$1.133
Each (On a Reel of 2500)
units
High Side - 135mΩ - 5.5 V 2.85A 2 - - - Surface Mount MSOP 8 +85 °C
RS Stock No. 122-3386
Mfr. Part No.AP2331W-7
HK$1.133
Each (On a Reel of 3000)
units
- Load Management 350mΩ - 5.2 V 0.2A 1 - - - Surface Mount SC-59 3 +85 °C
RS Stock No. 669-7502
Mfr. Part No.BSP75NTA
HK$7.456
Each (In a Pack of 5)
units
Low Side Low Side Switch 0.52Ω - 60 V 1.1A 1 - - - Surface Mount SOT-223 3 + Tab +150 °C
RS Stock No. 146-4793
Mfr. Part No.AP22814AM8-13
HK$4.923
Each (In a Pack of 10)
units
High Side - 65mΩ - 2.4 V 3.8A 2 - - - Surface Mount MSOP 8 +85 °C
RS Stock No. 921-0455
Mfr. Part No.AP22802AW5-7
HK$2.583
Each (In a Pack of 50)
units
- Distribution 60mΩ - 5.5 V 2A 1 - - - Surface Mount SOT-25 5 +85 °C
RS Stock No. 146-4777
Mfr. Part No.AP22814BW5-7
HK$5.204
Each (In a Pack of 10)
units
High Side - 65mΩ - 2.4 V 3.8A 1 - - - Surface Mount SOT25 5 +85 °C
RS Stock No. 169-7370
Mfr. Part No.AP2401S-13
HK$1.303
Each (On a Reel of 2500)
units
High Side - 135mΩ - 5.5 V 2.85A 2 - - - Surface Mount SOIC 8 +85 °C