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. 665-8832
Mfr. Part No.TPS2046BD
TWD78.00
Each (In a Pack of 5)
units
- - - - 5.5 V 0.7A 2 1 - - Surface Mount SOIC 8 +85 °C
RS Stock No. 146-5630
Mfr. Part No.LNK364PN
TWD27.80
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 162-7558
Mfr. Part No.TPS2046BD
TWD61.50
Each (In a Tube of 75)
units
- - - - 5.5 V 0.7A 2 1 - - Surface Mount SOIC 8 +85 °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. 671-0185
Mfr. Part No.FSFR2100
TWD214.00
Each
units
- - 0.32Ω - - - 1 - - - Through Hole SIP 9 +130 °C
RS Stock No. 178-5195
Mfr. Part No.VN750PSTR-E
TWD24.80
Each (On a Reel of 2500)
units
High Side Driver 120mΩ - 36 V 9A 1 - - - Surface Mount SOIC 8 +150 °C
RS Stock No. 146-5643
Mfr. Part No.TNY276PN
TWD33.90
Each (In a Tube of 50)
units
- Off Lineer 24Ω - - 1350mA 1 - 15W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5693
Mfr. Part No.TNY280PN
TWD56.30
Each (In a Tube of 50)
units
- Off Lineer 4.5Ω - - 2550mA 1 - 28.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5664
Mfr. Part No.TNY277GN
TWD49.20
Each (In a Tube of 50)
units
- Off Lineer 13.5Ω - - 1650mA 1 - 18W Over-Temperature Surface Mount SMDC 8 +150 °C
RS Stock No. 146-5658
Mfr. Part No.TNY277PN
TWD37.30
Each (In a Tube of 50)
units
- Off Lineer 13.5Ω - - 1650mA 1 - 18W Over-Temperature Through Hole DIPC 8 +150 °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. 146-5701
Mfr. Part No.TOP256GN
TWD61.00
Each (In a Tube of 50)
units
- Off Lineer 4.75Ω - - 4.08A 1 - 40W Over-Temperature Surface Mount SMDC 8 +150 °C
RS Stock No. 168-5065
Mfr. Part No.TPS259251DRCT
TWD29.80
Each (On a Reel of 250)
units
- - - - 13.8 V 5.7A 3 3 - - Surface Mount VSON 10 +85 °C
RS Stock No. 133-0738
Mfr. Part No.TPS259251DRCT
TWD51.20
Each (In a Pack of 5)
units
- - - - 13.8 V 5.7A 3 3 - - Surface Mount VSON 10 +85 °C
RS Stock No. 880-5538
Mfr. Part No.VN750PSTR-E
TWD47.50
Each (In a Pack of 10)
units
High Side Driver 120mΩ - 36 V 9A 1 - - - Surface Mount SOIC 8 +150 °C
RS Stock No. 911-1017
Mfr. Part No.BSP452HUMA1
BrandInfineon
TWD37.10
Each (On a Reel of 4000)
units
- - - - - - - - - - Surface Mount SOT-223 3 + Tab +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. 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. 823-5576
Mfr. Part No.BSP452HUMA1
BrandInfineon
TWD63.60
Each (In a Pack of 5)
units
- - - - - - - - - - Surface Mount SOT-223 3 + Tab +150 °C
RS Stock No. 423-163
Mfr. Part No.TPS2042BD
TWD49.20
Each (In a Pack of 5)
units
High Side USB Power 49mΩ - 5.5 V 1.25A 4 - - - Surface Mount SOIC 8 +85 °C