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 Mounting Type Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature
RS Stock No. 809-4996
Mfr. Part No.FAN3989MLP8X
€1.034
Each (On a Tape of 5)
units
- 1 - - Surface Mount MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C
RS Stock No. 662-2502
Mfr. Part No.TPS2148IDGN
€1.362
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W Surface Mount MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 145-1047
Mfr. Part No.TPS2148IDGN
€1.37
Each (In a Tube of 80)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W Surface Mount MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 166-2089
Mfr. Part No.FAN3989MLP8X
€0.42
Each (On a Reel of 3000)
units
- 1 - - Surface Mount MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C
RS Stock No. 111-5720
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
€0.924
Each (In a Pack of 5)
units
USB Power Distribution - - - Surface Mount SQFN 32 - 5.1 x 5.1 x 0.95mm 5.1mm 5.1mm 0.95mm 6 V +70 °C
RS Stock No. 144-5735
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
€0.939
Each (In a Tray of 490)
units
USB Power Distribution - - - Surface Mount SQFN 32 - 5.1 x 5.1 x 0.95mm 5.1mm 5.1mm 0.95mm 6 V +70 °C
RS Stock No. 165-8452
Mfr. Part No.AP2552FDC-7
€0.223
Each (On a Reel of 3000)
units
Low Side 1 150mΩ Internally Limited Surface Mount U-DFN2020 6 2542mA 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 5.5 V +85 °C
RS Stock No. 165-8453
Mfr. Part No.AP2553AW6-7
€0.146
Each (On a Reel of 3000)
units
High Side 1 135mΩ Internally Limited Surface Mount 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. 517-1056
Mfr. Part No.TPS2034D
€2.574
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 3A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 822-8824
Mfr. Part No.AP2191WG-7
€0.366
Each (In a Pack of 10)
units
High Side 1 170mΩ Internally Limited Surface Mount 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. 162-7138
Mfr. Part No.TPS2041BDGN
€1.358
Each (In a Tube of 80)
units
High Side, USB Power Distribution 4 70mΩ 1.71 W Surface Mount MSOP 8 1.25A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 162-8446
Mfr. Part No.TS3USB31ERSER
€0.563
Each (On a Reel of 3000)
units
High Side 1 - - Surface Mount UQFN 8 - 1.55 x 1.55 x 0.55mm 1.55mm 1.55mm 0.55mm 4.3 V +85 °C
RS Stock No. 165-4209
Mfr. Part No.UCS1003-2-BP
BrandMicrochip
€1.016
Each (In a Tray of 490)
units
- 2 55mΩ 2.19 W Surface Mount QFN 20 3000mA 4.1 x 4.1 x 0.9mm 4.1mm 4.1mm 0.9mm 5.5 V +125 °C
RS Stock No. 165-4312
Mfr. Part No.MIC2005A-1YM6-TR
BrandMicrochip
€0.187
Each (On a Reel of 3000)
units
High Side, USB Power Distribution 1 275mΩ Internally Limited Surface Mount SOT-23 6 0.9A 2.9 x 1.6 x 0.9mm 2.9mm 1.6mm 0.9mm 5.5 V +85 °C
RS Stock No. 662-2467
Mfr. Part No.TPS2054BD
€2.468
Each (In a Pack of 5)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW Surface Mount SOIC 16 1.25A 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 5.5 V +85 °C
New
RS Stock No. 178-4452
Mfr. Part No.FUSB303TMX
€0.318
Each (In a Pack of 50)
units
USB 1 - - Surface Mount QFN 12 - 1.65 x 1.65 x 0.35mm 1.65mm 1.65mm 0.35mm 22 V +85 °C
RS Stock No. 700-0735
Mfr. Part No.BD6510F-E2
BrandROHM
€2.315
Each (In a Pack of 2)
units
USB High Side Power 4 100mΩ 560 mW Surface Mount SOP 8 2A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm - -
RS Stock No. 146-1247
Mfr. Part No.MAX893LESA+
BrandMaxim
€0.937
Each (In a Tube of 100)
units
High Side 2 160mΩ 471 mW Surface Mount SOIC 8 1.2A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 162-7140
Mfr. Part No.TPS2062D
€1.608
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW Surface Mount SOIC 8 1.5A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 812-0405
Mfr. Part No.TPS2500DRCT
€2.836
Each (In a Pack of 5)
units
High Side, Low Side 1 120mΩ 2.4 W Surface Mount VSON 10 130 → 1400mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.25 V +85 °C
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