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. 920-3403
Mfr. Part No.TPS2044BD
$3.351
Each (In a Tube of 40)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW SOIC 16 1.25A 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 5.5 V +85 °C -
RS Stock No. 517-1084
Mfr. Part No.TPS2044BD
$4.28
Each (In a Pack of 5)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW SOIC 16 1.25A 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 5.5 V +85 °C -
RS Stock No. 517-1034
Mfr. Part No.TPS2022D
$4.142
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 33mΩ 725 mW 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. 162-4888
Mfr. Part No.TPS2022D
$2.148
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW 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. 423-090
Mfr. Part No.TPS2042BDGN
$2.31
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 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. 812-0408
Mfr. Part No.TPS2511DGN
$2.52
Each (In a Pack of 10)
units
High Side 1 120mΩ Internally Limited 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. 162-4887
Mfr. Part No.TPS2020D
$2.26
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW 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. 462-6123
Mfr. Part No.TPS2020D
$3.54
Each
units
High Side, USB Power Distribution 4 33mΩ 725 mW 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. 162-7918
Mfr. Part No.TPS2511DGN
$2.52
Each (In a Tube of 80)
units
High Side 1 120mΩ Internally Limited 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. 145-7721
Mfr. Part No.TPS2042BDGN
$1.703
Each (In a Tube of 80)
units
High Side, USB Power Distribution 4 49mΩ 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. 923-2461
Mfr. Part No.TPS2042BD
$1.589
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 49mΩ 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. 423-163
Mfr. Part No.TPS2042BD
$3.00
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 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. 162-7142
Mfr. Part No.TPS2065D
$0.985
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW 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. 121-9198
Mfr. Part No.TPS2051BDGN
$1.413
Each (In a Tube of 80)
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. 662-2439
Mfr. Part No.TPS2041BDGN
$2.198
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. 665-8894
Mfr. Part No.TPS2150IPWP
$4.286
Each (In a Pack of 5)
units
- - - Internally Limited HTSSOP 14 - 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm - +85 °C -
RS Stock No. 730-0657
Mfr. Part No.TPS2540RTET
$2.51
Each
units
High Side 1 120mΩ Internally Limited 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. 162-8090
Mfr. Part No.BQ24190RGET
$3.942
Each (On a Reel of 250)
units
High Side, Low Side 1 20mΩ - VQFN 24 9A 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V +85 °C -
RS Stock No. 662-2445
Mfr. Part No.TPS2045AD
$1.836
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 80mΩ 725 mW SOIC 8 0.5A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C -
RS Stock No. 922-4738
Mfr. Part No.TPS2052BD
$1.431
Each (In a Tube of 75)
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 -