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. 177-0326
Mfr. Part No.MIC2075-2YMM
BrandMicrochip
$0.99
Each (In a Tube of 100)
units
USB High Side Power 1 160mΩ - MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C -
New
RS Stock No. 202-7334
Mfr. Part No.NCP81599MNTXG
$1.076
Each (On a Reel of 2500)
units
Adjustable 1 - 4.1 W QFN32 32 - - - - - - - -
RS Stock No. 178-4452
Mfr. Part No.FUSB303TMX
$0.726
Each (In a Pack of 50)
units
USB 1 - - QFN 12 - 1.65 x 1.65 x 0.35mm 1.65mm 1.65mm 0.35mm 22 V +85 °C -
RS Stock No. 921-0420
Mfr. Part No.AP2171SG-13
$1.07
Each (In a Pack of 20)
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. 122-2325
Mfr. Part No.AP2331SA-7
$0.179
Each (On a Reel of 3000)
units
High Side 1 350mΩ - 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. 169-7472
Mfr. Part No.AP2142SG-13
$0.963
Each (On a Reel of 2500)
units
High Side 2 160mΩ Internally Limited SOP 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 146-4777
Mfr. Part No.AP22814BW5-7
$0.666
Each (In a Pack of 10)
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. 662-2381
Mfr. Part No.TPS2041BDBVT
$2.28
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. 910-1773
Mfr. Part No.MIC2505-1YM
BrandMicrochip
$2.77
Each (In a Pack of 5)
units
High Side, USB Power Distribution - - Internally Limited SOIC 8 4A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 7.5 V +85 °C -
RS Stock No. 146-4910
Mfr. Part No.AP22804ASN-7
$0.609
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. 169-7369
Mfr. Part No.AP2401MP-13
$0.179
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. 177-0752
Mfr. Part No.MIC2025-2YMM
BrandMicrochip
$1.03
Each (In a Pack of 20)
units
USB High Side Power 1 160mΩ - MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C -
RS Stock No. 178-4411
Mfr. Part No.FUSB302BVMPX
$1.90
Each (In a Pack of 10)
units
USB 1 - - WQFN 14 - 2.5 x 2.5 x 0.72mm 2.5mm 2.5mm 0.72mm 21 V +105 °C AEC-Q100
RS Stock No. 822-8824
Mfr. Part No.AP2191WG-7
$1.42
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 -
New
RS Stock No. 209-7683
Mfr. Part No.MIC2025-2YM-TR
BrandMicrochip
$1.358
Each (In a Pack of 10)
units
USB High Side Power 1 140MΩ - SOIC 8 - - - - - - - -
RS Stock No. 178-4287
Mfr. Part No.FUSB303TMX
$0.287
Each (On a Reel of 5000)
units
USB 1 - - QFN 12 - 1.65 x 1.65 x 0.35mm 1.65mm 1.65mm 0.35mm 22 V +85 °C -
RS Stock No. 165-8346
Mfr. Part No.AP2511MP-13
$0.243
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. 662-2454
Mfr. Part No.TPS2051BD
$2.37
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW SOIC 8 1.25A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C -
RS Stock No. 662-2439
Mfr. Part No.TPS2041BDGN
$1.806
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 70mΩ 1.71 W MSOP 8 1.25A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C -
RS Stock No. 910-1809
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
$0.322
Each (In a Pack of 25)
units
High Side 1 275mΩ Internally Limited SOT-23 5 0.5A 2.9 x 1.6 x 1.3mm 2.9mm 1.6mm 1.3mm 5.5 V +85 °C -
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