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. 864-4743
Mfr. Part No.FSUSB42MUX
$0.43
Each (On a Reel of 4000)
units
- 1 6.5Ω - MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C -
RS Stock No. 739-5144
Mfr. Part No.FSUSB42MUX
$1.05
Each
units
- 2 6.5Ω - MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C -
RS Stock No. 822-8833
Mfr. Part No.AP2401S-13
$0.566
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
$0.566
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. 169-7369
Mfr. Part No.AP2401MP-13
$0.22
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
$0.22
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. 662-2384
Mfr. Part No.TPS2051BDBVT
$2.508
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 95mΩ 285 mW SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C -
RS Stock No. 922-4729
Mfr. Part No.TPS2051BDBVT
$1.716
Each (On a Reel of 250)
units
High Side, USB Power Distribution 2 95mΩ 285 mW SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C -
RS Stock No. 822-8811
Mfr. Part No.AP2156MPG-13
$1.408
Each (In a Pack of 10)
units
High Side 2 160mΩ Internally Limited MSOP 8 1A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 921-0473
Mfr. Part No.AP2501M8-13
$0.622
Each (In a Pack of 30)
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. 165-8531
Mfr. Part No.AP2111MPG-13
$0.244
Each (On a Reel of 2500)
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. 169-7367
Mfr. Part No.AP2191WG-7
$1.087
Each (On a Reel of 3000)
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. 822-8821
Mfr. Part No.AP2331SA-7
$0.676
Each (In a Pack of 25)
units
High Side 1 350mΩ Internally Limited SOT-23 3 0.5A 3 x 1.4 x 1.1mm 3mm 1.4mm 1.1mm 5.2 V +85 °C -
RS Stock No. 177-0790
Mfr. Part No.MIC2075-2YM
BrandMicrochip
$1.705
Each (In a Pack of 10)
units
USB High Side Power 1 160mΩ - SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
RS Stock No. 177-0323
Mfr. Part No.MIC2075-1YM
BrandMicrochip
$1.422
Each (In a Tube of 95)
units
USB High Side Power 1 160mΩ - SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
RS Stock No. 163-0710
Mfr. Part No.NCP383LMUAJAATXG
$0.974
Each (On a Reel of 3000)
units
High Side 2 95Ω 850 mW UDFN 10 3.01A 3 x 3 x 0.5mm 3mm 3mm 0.5mm 5.5 V +85 °C -
RS Stock No. 165-8532
Mfr. Part No.AP2171SG-13
$0.605
Each (On a Reel of 2500)
units
High Side 2 110mΩ Internally Limited U-DFN2018 6 1.9A 1.87 x 2.07 x 0.555mm 1.87mm 2.07mm 0.555mm 5.5 V +85 °C -
RS Stock No. 169-8418
Mfr. Part No.MAX1607ESA+
$1.881
Each (In a Tube of 100)
units
High Side 1 150mΩ 471 mW SOIC 8 1A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 186-1262
Mfr. Part No.FUSB307BVMPX
$1.626
Each (On a Reel of 3000)
units
USB - - - WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +105 °C -
RS Stock No. 921-0492
Mfr. Part No.AP2553AW6-7
$0.693
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 -
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