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. 812-0408
Mfr. Part No.TPS2511DGN
HK$14.426
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. 162-7918
Mfr. Part No.TPS2511DGN
HK$14.426
Each (In a Tube of 80)
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. 730-0657
Mfr. Part No.TPS2540RTET
HK$18.03
Each
units
High Side 1 120mΩ Internally Limited Surface Mount WQFN 16 2.8A 3.15 x 3.15 x 0.75mm 3.15mm 3.15mm 0.75mm 5.5 V +85 °C
RS Stock No. 168-4137
Mfr. Part No.TPS2540RTET
HK$12.24
Each (On a Reel of 250)
units
High Side 1 120mΩ Internally Limited Surface Mount WQFN 16 2.8A 3.15 x 3.15 x 0.75mm 3.15mm 3.15mm 0.75mm 5.5 V +85 °C
RS Stock No. 145-6565
Mfr. Part No.TPS2066D
HK$15.513
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. 162-4887
Mfr. Part No.TPS2020D
HK$20.796
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 0.3A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 517-1078
Mfr. Part No.TPS2042AD
HK$26.412
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 80mΩ 725 mW Surface Mount SOIC 8 0.9A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 662-2451
Mfr. Part No.TPS2052BD
HK$16.434
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 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. 709-8795
Mfr. Part No.TPS2553DBVT
HK$17.26
Each
units
USB Power Distribution 1 85mΩ 625 mW Surface Mount SOT-23 6 1.2A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 6.5 V +85 °C
RS Stock No. 662-2502
Mfr. Part No.TPS2148IDGN
HK$24.89
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. 162-4888
Mfr. Part No.TPS2022D
HK$20.796
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 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. 423-163
Mfr. Part No.TPS2042BD
HK$16.434
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 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. 145-0390
Mfr. Part No.TPS2041BD
HK$11.074
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. 817-5587
Mfr. Part No.TS3USB31ERSER
HK$8.222
Each (On a Tape of 25)
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. 145-6749
Mfr. Part No.TPS2052BDGN
HK$15.768
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. 145-7715
Mfr. Part No.TPS2066CDGN
HK$15.18
Each (In a Tube of 80)
units
High Side 2 112mΩ Internally Limited Surface Mount MSOP 8 2.1A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 147-360
Mfr. Part No.TPS2061D
HK$14.338
Each (In a Pack of 5)
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. 662-2489
Mfr. Part No.TPS2066D
HK$18.278
Each (In a Pack of 5)
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. 662-2457
Mfr. Part No.TPS2051BDGN
HK$15.18
Each (In a Pack of 5)
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. 162-7135
Mfr. Part No.TPS2021D
HK$20.884
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 0.9A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C