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. 747-0992
Mfr. Part No.NCP380HSNAJAAT1G
HK$8.728
Each (In a Pack of 5)
units
- - - - 5.5 V 2.1A 2 2 - - Surface Mount TSOP 5 +125 °C
RS Stock No. 146-5693
Mfr. Part No.TNY280PN
HK$16.756
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. 146-5679
Mfr. Part No.TNY279PN
HK$14.538
Each (In a Tube of 50)
units
- Off Lineer 6.7Ω - - 2250mA 1 - 25W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 162-8784
Mfr. Part No.TPS2561DRCT
HK$10.702
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. 146-5632
Mfr. Part No.TNY274PN
HK$9.086
Each (In a Tube of 50)
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5630
Mfr. Part No.LNK364PN
HK$8.284
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 146-5643
Mfr. Part No.TNY276PN
HK$10.101
Each (In a Tube of 50)
units
- Off Lineer 24Ω - - 1350mA 1 - 15W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 825-6765
Mfr. Part No.TPS2561DRCT
HK$16.26
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. 123-5392
Mfr. Part No.LNK605DG
HK$14.844
Each (In a Pack of 5)
units
- - - - - - - - - - Surface Mount SOIC 7 +150 °C
RS Stock No. 146-5616
Mfr. Part No.LNK562PN
HK$6.667
Each (In a Tube of 50)
units
- Off Lineer 88Ω - - 375mA 1 - 1.9W Over-Temperature Through Hole DIPB 8 +150 °C
RS Stock No. 124-5360
Mfr. Part No.NCP45520IMNTWG-H
Brandonsemi
HK$5.475
Each (On a Reel of 3000)
units
- Controlled Load 22.5mΩ - 5.5 V - 1 - 2.5W - Surface Mount DFN 8 +85 °C
RS Stock No. 921-5150
Mfr. Part No.TPS22945DCKR
HK$6.199
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$12.426
Each (In a Pack of 5)
units
- - - - 5.5 V 0.15A 1 - - - Surface Mount SC-70 5 +85 °C
RS Stock No. 807-6058
Mfr. Part No.FSL116HR
Brandonsemi
HK$11.009
Each (In a Pack of 10)
units
- Integrated PWM Controller 10Ω - 265 V 1A 1 - 14W - Through Hole PDIP 8 +105 °C
RS Stock No. 821-5294
Mfr. Part No.NCP45520IMNTWG-H
Brandonsemi
HK$11.104
Each (In a Pack of 20)
units
- Controlled Load 22.5mΩ - 5.5 V - 1 - 2.5W - Surface Mount DFN 8 +85 °C
RS Stock No. 825-9143
Mfr. Part No.BTS724GXUMA1
BrandInfineon
HK$49.536
Each (In a Pack of 5)
units
High Side High Side Switch 180mΩ - 40 V 3.3A 4 - - - Surface Mount DSO 20 +150 °C
RS Stock No. 146-5722
Mfr. Part No.LNK306DN
HK$11.505
Each (In a Tube of 100)
units
Low Side Off Lineer 12.9Ω - - 360mA 1 - - Short Circuit Surface Mount SOC 8 +150 °C
RS Stock No. 146-5641
Mfr. Part No.TNY275GN
HK$12.626
Each (In a Tube of 50)
units
- Off Lineer 33Ω - - 560mA 1 - 11.5W Over-Temperature Surface Mount SMDC 8 +150 °C
RS Stock No. 145-4618
Mfr. Part No.FSL116HR
Brandonsemi
HK$10.502
Each (In a Tube of 50)
units
- Integrated PWM Controller 10Ω - 265 V 1A 1 - 14W - Through Hole PDIP 8 +105 °C
RS Stock No. 803-1857
Mfr. Part No.FPF2701MX
Brandonsemi
HK$28.58
Each (In a Pack of 5)
units
- - - - 36 V 2A 1 1 - - Surface Mount SOIC 8 +85 °C