USB Power Switches

USB power switches are power management devices used to charge electronic devices on USB ports and hubs on computers, docking stations, handheld devices and automotive devices. 


How do USB power switches work?

They work by monitoring the current on a device and latch a switch off if the output current is shorted. They often have an auto reset feature which reactivates the switch once the short circuit is removed. They work in the same way as hot swap controllers, which allow circuit boards and electronic cards to be inserted into equipment, removing the need to power down during use.


Features of USB power switches

Most USB power switches have multiple safety features. For instance, built in thermal-overload protection limits junction temperature and dissipation of power. 


The internal circuity is limited to an accurate figure to protect the input supply against short circuit conditions as well as overload. They're also fitted with fault signals that notify the microprocessor whenever there's a current-limit, under voltage lockout (UVLO), short-circuit fault or thermal overload.


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Description Price Switch Type Number of Outputs Switch On Resistance Maximum Power Dissipation Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature Automotive Standard
RS Stock No. 169-7369
Mfr. Part No.AP2401MP-13
$0.242
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 169-7370
Mfr. Part No.AP2401S-13
$0.273
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 822-8833
Mfr. Part No.AP2401S-13
$0.305
Each (In a Pack of 25)
units
High Side 2 135mΩ Internally Limited SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 822-8830
Mfr. Part No.AP2401MP-13
$0.184
Each (In a Pack of 25)
units
High Side 2 135mΩ Internally Limited MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 822-8824
Mfr. Part No.AP2191WG-7
$0.749
Each (In a Pack of 10)
units
High Side 1 170mΩ Internally Limited SOT-25 5 2.6A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
RS Stock No. 921-0414
Mfr. Part No.AP2152SG-13
$2.05
Each (In a Pack of 5)
units
High Side 2 160mΩ Internally Limited SOIC 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 165-8345
Mfr. Part No.AP2501M8-13
$0.311
Each (On a Reel of 2500)
units
Low Side 2 135mΩ Internally Limited MSOP 8 4.6A 3.1 x 3.1 x 0.8mm 3.1mm 3.1mm 0.8mm 5.5 V +85 °C -
RS Stock No. 146-4707
Mfr. Part No.AP22814AW5-7
$0.478
Each (On a Reel of 3000)
units
High Side 1 65mΩ - SOT25 5 3.8A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C -
RS Stock No. 165-8523
Mfr. Part No.AP2171DM8G-13
$0.335
Each (On a Reel of 2500)
units
High Side 2 115mΩ Internally Limited MSOP 8 1.9A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 165-8558
Mfr. Part No.AP2191SG-13
$1.339
Each (On a Reel of 2500)
units
High Side 2 115mΩ Internally Limited SOIC 8 2.6A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 146-4797
Mfr. Part No.AP22804BW5-7
$0.99
Each (In a Pack of 10)
units
High Side 1 65mΩ - SOT25 5 3.3A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C -
RS Stock No. 146-4781
Mfr. Part No.AP22804BSN-7
$0.99
Each (In a Pack of 10)
units
High Side 1 65mΩ - U-DFN2020 5 + Tab 3.3A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C -
RS Stock No. 921-0492
Mfr. Part No.AP2553AW6-7
$0.628
Each (In a Pack of 10)
units
High Side 1 135mΩ Internally Limited SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
RS Stock No. 146-4709
Mfr. Part No.AP22814BSN-7
$0.478
Each (On a Reel of 3000)
units
High Side 1 65mΩ - U-DFN2020 5 + Tab 3.8A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C -
RS Stock No. 146-4894
Mfr. Part No.AP22814ASN-7
$1.12
Each (In a Pack of 10)
units
High Side 1 65mΩ - U-DFN2020 5 + Tab 3.8A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C -
RS Stock No. 165-8530
Mfr. Part No.AP2101MPG-13
$0.578
Each (On a Reel of 2500)
units
Low Side 2 115mΩ Internally Limited MSOP 8EP 8 2.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 165-8346
Mfr. Part No.AP2511MP-13
$0.311
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited MSOP 8EP 8 4.6A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 921-0385
Mfr. Part No.AP2111MPG-13
$0.699
Each (In a Pack of 20)
units
High Side 2 115mΩ Internally Limited MSOP 8EP 8 2.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 146-4711
Mfr. Part No.AP22814AM8-13
$0.462
Each (On a Reel of 2500)
units
High Side 2 65mΩ - MSOP 8 3.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 2.4 V +85 °C -
RS Stock No. 170-9001
Mfr. Part No.AP2152SG-13
$1.495
Each (On a Reel of 2500)
units
High Side 2 160mΩ Internally Limited SOIC 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -