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. 145-1047
Mfr. Part No.TPS2148IDGN
€2.115
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. 809-4996
Mfr. Part No.FAN3989MLP8X
€0.516
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. 166-2089
Mfr. Part No.FAN3989MLP8X
€0.464
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. 662-2502
Mfr. Part No.TPS2148IDGN
€2.508
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. 144-5735
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
€1.198
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. 111-5720
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
€1.774
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. 171-2069
Mfr. Part No.BD6516F-E2
BrandROHM
€0.75
Each (On a Reel of 2500)
units
High Side 2 180Ω 670 mW Surface Mount SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C
RS Stock No. 171-2070
Mfr. Part No.BD6517F-E2
BrandROHM
€0.98
Each (On a Reel of 2500)
units
High Side 2 180Ω 670 mW Surface Mount SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C
RS Stock No. 812-0408
Mfr. Part No.TPS2511DGN
€1.482
Each (In a Pack of 10)
units
High Side 1 120mΩ Internally Limited Surface Mount MSOP 8 3330mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 662-2401
Mfr. Part No.TPS2551DBVT
€2.448
Each (In a Pack of 5)
units
High Side, USB Power Distribution 1 85mΩ 625 mW Surface Mount SOT-23 6 1.1A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 6.5 V +85 °C
RS Stock No. 121-9198
Mfr. Part No.TPS2051BDGN
€1.325
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. 146-4807
Mfr. Part No.AP22814BM8-13
€0.536
Each (In a Pack of 10)
units
High Side 2 65mΩ - Surface Mount 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. 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. 817-5859
Mfr. Part No.BQ24196RGET
€2.89
Each
units
High Side, Low Side 1 51mΩ - Surface Mount VQFN 24 9A 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V +85 °C
RS Stock No. 145-0390
Mfr. Part No.TPS2041BD
€1.133
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW Surface Mount 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. 864-4712
Mfr. Part No.FSUSB63UMX
€0.388
Each (On a Reel of 5000)
units
Multiplexer - - - Surface Mount UMLP 12 - 1.8 x 1.8 x 0.5mm 1.8mm 1.8mm 0.5mm - +85 °C
RS Stock No. 921-0473
Mfr. Part No.AP2501M8-13
€0.257
Each (In a Pack of 30)
units
Low Side 2 135mΩ Internally Limited Surface Mount 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. 921-0445
Mfr. Part No.AP2191SG-13
€0.82
Each (In a Pack of 10)
units
High Side 2 115mΩ Internally Limited Surface Mount 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. 160-4460
Mfr. Part No.ADP198ACBZ-R7
€0.631
Each (On a Reel of 3000)
units
High Side 1 90mΩ - Surface Mount WLCSP 4 - 0.99 x 1.065 x 0.37mm 0.99mm 1.065mm 0.37mm 6.5 V +85 °C
RS Stock No. 166-2142
Mfr. Part No.FSA9280AUMX
€0.878
Each (On a Reel of 5000)
units
USB Accessory Detection Switch 1 10Ω - Surface Mount UMLP 20 - 3 x 4 x 0.5mm 3mm 4mm 0.5mm 4.4 V +85 °C
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