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. 671-0185
Mfr. Part No.FSFR2100
TWD214.00
Each
units
- - 0.32Ω - - - 1 - - - Through Hole SIP 9 +130 °C
RS Stock No. 864-4995
Mfr. Part No.FSFR2100
TWD193.30
Each (In a Tube of 19)
units
- Power Switch 4.75Ω - 25 V 8.3A 1 - 200W - Through Hole SIP 9 +130 °C
RS Stock No. 145-4321
Mfr. Part No.KA5L0380RYDTU
TWD35.60
Each (In a Tube of 50)
units
- Off Lineer 4.6Ω - 30 V 2.41A 1 - 75W - Through Hole TO-220F 4 +85 °C
RS Stock No. 124-1345
Mfr. Part No.FDC6330L
TWD6.70
Each (On a Reel of 3000)
units
- Integrated Load 0.125Ω - 20 V 2.3A 2 - 0.7W - Surface Mount SOT-23 6 +150 °C
RS Stock No. 761-3372
Mfr. Part No.FDC6330L
TWD16.20
Each (In a Pack of 10)
units
- Integrated Load Switch 0.125Ω - 20 V 2.3A 2 - 0.7W - Surface Mount SOT-23 6 +150 °C
RS Stock No. 145-5476
Mfr. Part No.FSL126MRTWDTU
TWD48.90
Each (In a Tube of 50)
units
- PWM Controller 6.2Ω - - 1.2A 1 - 30W - Surface Mount TO-220F 6 +125 °C
RS Stock No. 862-9107
Mfr. Part No.FSL126MRTWDTU
TWD57.60
Each (In a Pack of 5)
units
- PWM Controller 6.2Ω - - 1.2A 1 - 30W - Surface Mount TO-220F 6 +125 °C
RS Stock No. 145-4415
Mfr. Part No.FSFR2100XSL
TWD105.20
Each (In a Tube of 19)
units
- Resonant Converter 0.51Ω - 400 V - 1 - 180W - Through Hole SIP 10 +130 °C
RS Stock No. 166-1829
Mfr. Part No.FDC6331L
TWD6.40
Each (On a Reel of 3000)
units
- Integrated Load 0.1Ω - 8 V 2.8A 2 - 0.7W - Surface Mount SOT-23 6 +150 °C
RS Stock No. 163-2226
Mfr. Part No.NCP330MUTBG
TWD9.20
Each (On a Reel of 3000)
units
- Load 50mΩ - 5.5 V 5A 1 - 0.225W - Surface Mount DFN 4 +125 °C
RS Stock No. 862-9088
Mfr. Part No.FSFR2100XSL
TWD147.50
Each (In a Pack of 2)
units
- Resonant Converter 0.51Ω - 400 V - 1 - 180W - Through Hole SIP 10 +130 °C
RS Stock No. 166-3757
Mfr. Part No.FPF2110
TWD14.20
Each (On a Reel of 3000)
units
- MOSFET Load 200mΩ - 5.5 V 800mA 1 - 667mW - Surface Mount SOT-23 5 +85 °C
RS Stock No. 166-2143
Mfr. Part No.FSUSB74UMX
TWD12.30
Each (On a Reel of 5000)
units
- USB - 4.4 V - 1 - - - Surface Mount UMLP 16 +85 °C
RS Stock No. 808-8963
Mfr. Part No.FPF2700MPX
TWD94.20
Each (In a Pack of 5)
units
- - - - 36 V 2A 1 1 - - Surface Mount MLP 8 +125 °C
RS Stock No. 862-9145
Mfr. Part No.FSQ0265RLX
TWD55.60
Each (In a Pack of 5)
units
- PWM Controller 6mΩ - - 1.2A 1 - 14W - Surface Mount LSOP 8 +85 °C
RS Stock No. 761-3616
Mfr. Part No.FDC6331L
TWD19.40
Each (In a Pack of 5)
units
- Integrated Load Switch 0.1Ω - 8 V 2.8A 2 - 0.7W - Surface Mount SOT-23 6 +150 °C
RS Stock No. 802-1496
Mfr. Part No.NCP330MUTBG
TWD21.20
Each (On a Tape of 25)
units
- Load 50mΩ - 5.5 V 5A 1 - 0.225W - Surface Mount DFN 4 +125 °C
RS Stock No. 166-3503
Mfr. Part No.FSUSB74MPX
TWD18.60
Each (On a Reel of 3000)
units
- USB - 4.4 V - 1 - - - Surface Mount MLP 16 +85 °C
RS Stock No. 145-4649
Mfr. Part No.FSL336LRN
TWD41.00
Each (In a Tube of 50)
units
- Integrate Pulse Width Modulator - - - 1.8A 1 - 7.08W - Through Hole PDIP 7 -
RS Stock No. 862-9195
Mfr. Part No.FSUSB74MPX
TWD43.60
Each (In a Pack of 5)
units
- USB - 4.4 V - 1 - - - Surface Mount MLP 16 +85 °C