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. 146-8577
Mfr. Part No.LNK364PN
$2.37
Each
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 146-5630
Mfr. Part No.LNK364PN
$1.434
Each (In a Tube of 50)
units
- Off Lineer 45Ω - - 750mA 1 - 6W Short Circuit Through Hole DIPB 8 +150 °C
RS Stock No. 146-5693
Mfr. Part No.TNY280PN
$2.728
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. 146-8631
Mfr. Part No.TNY280PN
$4.06
Each
units
- Off Lineer 4.5Ω - - 2550mA 1 - 28.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 809-1310
Mfr. Part No.VNP35N07-E
$8.275
Each (In a Pack of 2)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 70 V 35A - - - - Through Hole TO-220 3 -
RS Stock No. 168-7848
Mfr. Part No.VNP35N07-E
$6.13
Each (In a Tube of 50)
units
- OMNIFET: Fully Autoprotected Power MOSFET - - 70 V 35A - - - - Through Hole TO-220 3 -
RS Stock No. 146-5679
Mfr. Part No.TNY279PN
$2.918
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. 146-8618
Mfr. Part No.TNY279PN
$3.59
Each
units
- Off Lineer 6.7Ω - - 2250mA 1 - 25W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-5697
Mfr. Part No.TOP256EN
$2.94
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. 146-8588
Mfr. Part No.TNY274PN
$2.26
Each
units
- Off Lineer 48Ω - - 750mA 1 - 8.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-8635
Mfr. Part No.TOP256EN
$3.25
Each
units
- Off Lineer 4.75Ω - - 4.08A 1 - 86W Over-Temperature Surface Mount ESIPC 7 +150 °C
RS Stock No. 146-5641
Mfr. Part No.TNY275GN
$1.988
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. 146-5632
Mfr. Part No.TNY274PN
$1.502
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. 166-1681
Mfr. Part No.FAN7631SJX
$1.41
Each (On a Reel of 2000)
units
- PFM Controller - - 25 V 8A - - 192W - Surface Mount SOP 16 +130 °C
RS Stock No. 920-6323
Mfr. Part No.TDE1798DP
$8.776
Each (In a Tube of 50)
units
- High Speed - - 50 V 8mA 1 - - - Through Hole PDIP 8 +85 °C
RS Stock No. 146-5636
Mfr. Part No.TNY275PN
$1.735
Each (In a Tube of 50)
units
- Off Lineer 33Ω - - 560mA 1 - 11.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 146-8555
Mfr. Part No.TNY275PN
$2.32
Each
units
- Off Lineer 33Ω - - 560mA 1 - 11.5W Over-Temperature Through Hole DIPC 8 +150 °C
RS Stock No. 760-5854
Mfr. Part No.FAN7631SJX
$3.06
Each (In a Pack of 5)
units
- PFM Controller - - 25 V 8A - - 192W - Surface Mount SOP 16 +130 °C
RS Stock No. 189-1201
Mfr. Part No.TDE1798DP
$10.34
Each
units
- High Speed Switch - - 50 V 8mA 1 - - - Through Hole PDIP 8 +85 °C
RS Stock No. 864-4743
Mfr. Part No.FSUSB42MUX
$0.377
Each (On a Reel of 4000)
units
- USRT Switch 6.5Ω - - - 1 - - - Surface Mount MSOP 10 +85 °C