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. 807-6058
Mfr. Part No.FSL116HR
MYR4.277
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. 145-4618
Mfr. Part No.FSL116HR
MYR4.065
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. 145-4321
Mfr. Part No.KA5L0380RYDTU
MYR4.601
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. 671-0217
Mfr. Part No.FSQ0565RWDTU
MYR14.066
Each (In a Pack of 5)
units
- Quasi Resonant Converter 2.2Ω - 20 V 3.36A 1 - 80W - Through Hole TO-220 6 +85 °C
RS Stock No. 124-5357
Mfr. Part No.NCP380HMUAJAATBG
MYR1.26
Each (On a Reel of 3000)
units
- - - - 5.5 V 2.1A 2 2 - - Surface Mount UDFN 6 +125 °C
RS Stock No. 747-0986
Mfr. Part No.NCP380HMUAJAATBG
MYR3.285
Each (In a Pack of 2)
units
- - - - 5.5 V 2.1A 2 2 - - Surface Mount UDFN 6 +125 °C
RS Stock No. 761-3372
Mfr. Part No.FDC6330L
MYR2.163
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. 821-5294
Mfr. Part No.NCP45520IMNTWG-H
MYR4.805
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. 124-5360
Mfr. Part No.NCP45520IMNTWG-H
MYR2.256
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. 124-1345
Mfr. Part No.FDC6330L
MYR0.924
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. 805-6751
Mfr. Part No.UAA2016DG
MYR5.24
Each (In a Pack of 10)
units
- - - - - - 1 - - - Surface Mount SOIC 8 +85 °C
RS Stock No. 121-7895
Mfr. Part No.UAA2016DG
MYR5.953
Each (In a Tube of 98)
units
- - - - - - 1 - - - Surface Mount SOIC 8 +85 °C
RS Stock No. 862-8791
Mfr. Part No.FR015L3EZ
MYR2.577
Each (In a Pack of 25)
units
- Reverse Polarity Protector 30mΩ - 1.3 V 8A 1 - - - Surface Mount MLP 6 +125 °C
RS Stock No. 145-4416
Mfr. Part No.FSL117MRIN
MYR4.857
Each (In a Tube of 50)
units
- PWM Controller 11Ω - - 0.8A 1 - 10W - Through Hole PDIP 8 +125 °C
RS Stock No. 166-2274
Mfr. Part No.FR015L3EZ
MYR1.112
Each (On a Reel of 3000)
units
- Reverse Polarity Protector 30mΩ - 1.3 V 8A 1 - - - Surface Mount MLP 6 +125 °C
RS Stock No. 862-9094
Mfr. Part No.FSL117MRIN
MYR5.694
Each (In a Pack of 5)
units
- PWM Controller 11Ω - - 0.8A 1 - 10W - Through Hole PDIP 8 +125 °C
RS Stock No. 166-3622
Mfr. Part No.FSFR1700XSL
MYR14.164
Each (In a Tube of 19)
units
- Resonant Converter 1.25Ω - 400 V - 1 - 100W - Through Hole SIP 10 +130 °C
RS Stock No. 747-0992
Mfr. Part No.NCP380HSNAJAAT1G
MYR3.676
Each (In a Pack of 5)
units
- - - - 5.5 V 2.1A 2 2 - - Surface Mount TSOP 5 +125 °C
RS Stock No. 145-4391
Mfr. Part No.FSFR1800XS
MYR9.20
Each (In a Tube of 19)
units
- - 0.95Ω - 400 V 7A 1 - 260W - Through Hole SIP 9 +135 °C
RS Stock No. 145-4639
Mfr. Part No.FSFA2100
MYR26.975
Each (In a Tube of 19)
units
- PWM Converter 0.38Ω - 400 V - 1 - 200W - Through Hole SIP 10 +130 °C