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. 165-8353
Mfr. Part No.AP2337SA-7
HK$1.11
Each (On a Reel of 3000)
units
High Side 1 170mΩ Internally Limited Surface Mount SOT-23 3 1.9A 3 x 1.4 x 1.1mm 3mm 1.4mm 1.1mm 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. 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. 921-0470
Mfr. Part No.AP2337SA-7
HK$3.116
Each (In a Pack of 30)
units
High Side 1 170mΩ Internally Limited Surface Mount SOT-23 3 1.9A 3 x 1.4 x 1.1mm 3mm 1.4mm 1.1mm 5.5 V +85 °C
RS Stock No. 864-4743
Mfr. Part No.FSUSB42MUX
HK$2.146
Each (On a Reel of 4000)
units
- 1 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C
RS Stock No. 739-5144
Mfr. Part No.FSUSB42MUX
HK$5.13
Each
units
- 2 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C
RS Stock No. 146-4722
Mfr. Part No.AP22804BW5-7
HK$2.039
Each (On a Reel of 3000)
units
High Side 1 65mΩ - Surface Mount SOT25 5 3.3A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS Stock No. 165-4064
Mfr. Part No.MIC2009YM6-TR
BrandMicrochip
HK$6.76
Each (On a Reel of 3000)
units
High Side 1 275mΩ Internally Limited Surface Mount SOT-23 6 0.2 → 2A 2.9 x 1.6 x 1.3mm 2.9mm 1.6mm 1.3mm 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. 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. 885-5410
Mfr. Part No.AP2553AFDC-7
HK$3.41
Each (In a Pack of 10)
units
High Side 1 150mΩ 833 mW Surface Mount U-DFN2020 6 2542mA 2.075 x 2.075 x 0.58mm 2.08mm 2.075mm 0.58mm 5.5 V +85 °C
RS Stock No. 822-8811
Mfr. Part No.AP2156MPG-13
HK$7.046
Each (In a Pack of 10)
units
High Side 2 160mΩ Internally Limited Surface Mount MSOP 8 1A 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
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. 165-8557
Mfr. Part No.AP2145SG-13
HK$3.93
Each (On a Reel of 2500)
units
Low Side 2 140mΩ Internally Limited Surface Mount SOIC 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 177-0326
Mfr. Part No.MIC2075-2YMM
BrandMicrochip
HK$5.311
Each (In a Tube of 100)
units
USB High Side Power 1 160mΩ - Surface Mount MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C
RS Stock No. 662-2473
Mfr. Part No.TPS2064DGN
HK$22.354
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 70mΩ 1.37 W Surface Mount MSOP 8 2.1A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +70 °C
RS Stock No. 812-0405
Mfr. Part No.TPS2500DRCT
HK$26.92
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
RS Stock No. 122-3271
Mfr. Part No.AP2411S-13
HK$1.022
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited Surface Mount SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
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