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. 146-5643
Mfr. Part No.TNY276PN
R 16.544
Each (In a Tube of 50)
units
- Off Lineer 24Ω - - 1350mA 1 - 15W Over-Temperature Through Hole DIPC 8 +150 °C
RS stock no. 662-2384
Mfr. Part No.TPS2051BDBVT
R 25.478
Each (In a Pack of 5)
units
High Side USB Power 95mΩ - 5.5 V 1.25A 2 - - - Surface Mount SOT-23 5 +85 °C
RS stock no. 922-4729
Mfr. Part No.TPS2051BDBVT
R 11.016
Each (On a Reel of 250)
units
High Side USB Power 95mΩ - 5.5 V 1.25A 2 - - - Surface Mount SOT-23 5 +85 °C
RS stock no. 752-8274
Mfr. Part No.BTS5242-2L
BrandInfineon
R 63.59
Each
units
High Side High Side Switch 48mΩ - 28 V 6A 4 - - - Surface Mount SOIC 12 +150 °C
RS stock no. 671-0172
Mfr. Part No.FSDM311A
R 15.662
Each (In a Pack of 5)
units
- - 14Ω - - - 1 - - - Through Hole PDIP 8 +85 °C
RS stock no. 145-4490
Mfr. Part No.FSDM311A
R 13.636
Each (In a Tube of 50)
units
- - 14Ω - - - 1 - - - Through Hole PDIP 8 +85 °C
RS stock no. 166-0819
Mfr. Part No.BTS621L1E3128ABUMA1
BrandInfineon
R 39.327
Each (On a Reel of 1000)
units
High Side High Side Power Switch 200mΩ - 43 V 8.5A 2 - - - Surface Mount TO-263 7 +150 °C
RS stock no. 110-7772
Mfr. Part No.BTS621L1E3128ABUMA1
BrandInfineon
R 73.055
Each (In a Pack of 4)
units
High Side High Side Power Switch 200mΩ - 43 V 8.5A 2 - - - Surface Mount TO-263 7 +150 °C
RS stock no. 146-5631
Mfr. Part No.LNK364GN
R 14.546
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Surface Mount SMDB 8 +150 °C
RS stock no. 906-4365
Mfr. Part No.TLE6220GPAUMA2
BrandInfineon
R 95.89
Each (In a Pack of 2)
units
Low Side Low Side Switch 0.7Ω - 7 V 3A 4 - - - Surface Mount DSO 20 +150 °C
RS stock no. 178-5044
Mfr. Part No.TLE6220GPAUMA2
BrandInfineon
R 46.977
Each (On a Reel of 800)
units
Low Side Low Side Switch 0.7Ω - 7 V 3A 4 - - - Surface Mount DSO 20 +150 °C
RS stock no. 920-6547
Mfr. Part No.VNS3NV04DPTR-E
R 12.976
Each (On a Reel of 2500)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 40 V 3.5A - - - - Surface Mount SOIC 8 -
RS stock no. 877-3144
Mfr. Part No.VNS3NV04DP-E
R 29.734
Each (In a Pack of 5)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 40 V 3.5A - - - - Surface Mount SOIC 8 +150 °C
RS stock no. 793-1415
Mfr. Part No.VNS3NV04DPTR-E
R 28.316
Each (In a Pack of 5)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 40 V 3.5A - - - - Surface Mount SOIC 8 -
RS stock no. 168-8915
Mfr. Part No.VNS3NV04DP-E
R 21.076
Each (In a Tube of 100)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 40 V 3.5A - - - - Surface Mount SOIC 8 +150 °C
RS stock no. 826-8235
Mfr. Part No.BTS721L1XUMA1
BrandInfineon
R 153.99
Each
units
- - - - - - - - - - Surface Mount DSO 20 -
RS stock no. 124-8749
Mfr. Part No.BTS721L1XUMA1
BrandInfineon
R 57.425
Each (On a Reel of 1000)
units
- - - - - - - - - - Surface Mount DSO 20 -
RS stock no. 146-5697
Mfr. Part No.TOP256EN
R 30.018
Each (In a Tube of 48)
units
- Off Lineer 4.75Ω - - 4.08A 1 - 86W Over-Temperature Surface Mount ESIPC 7 +150 °C
RS stock no. 166-3622
Mfr. Part No.FSFR1700XSL
R 37.025
Each (In a Tube of 19)
units
- Resonant Converter 1.25Ω - 400 V - 1 - 100W - Through Hole SIP 10 +130 °C
RS stock no. 671-0138
Mfr. Part No.FSCQ0765RTYDTU
R 30.926
Each (In a Pack of 5)
units
- - 1.4Ω - - - 1 - - - Through Hole TO-220F 5 +85 °C