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. 739-5144
Mfr. Part No.FSUSB42MUX
$0.54
Each
units
- 2 6.5Ω - MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C -
RS Stock No. 864-4743
Mfr. Part No.FSUSB42MUX
$0.382
Each (On a Reel of 4000)
units
- 1 6.5Ω - MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C -
RS Stock No. 169-7370
Mfr. Part No.AP2401S-13
$0.216
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 822-8830
Mfr. Part No.AP2401MP-13
$0.211
Each (In a Pack of 25)
units
High Side 2 135mΩ Internally Limited MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 169-7369
Mfr. Part No.AP2401MP-13
$0.216
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 822-8833
Mfr. Part No.AP2401S-13
$0.435
Each (In a Pack of 25)
units
High Side 2 135mΩ Internally Limited SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 922-4729
Mfr. Part No.TPS2051BDBVT
$1.144
Each (On a Reel of 250)
units
High Side, USB Power Distribution 2 95mΩ 285 mW SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C -
RS Stock No. 662-2384
Mfr. Part No.TPS2051BDBVT
$2.278
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 95mΩ 285 mW SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C -
RS Stock No. 817-5834
Mfr. Part No.BQ24190RGET
$6.29
1 Tape of 1
Tape(s)
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. 921-0411
Mfr. Part No.AP2171DM8G-13
$0.419
Each (In a Pack of 30)
units
High Side 2 115mΩ Internally Limited MSOP 8 1.9A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 662-2451
Mfr. Part No.TPS2052BD
$3.244
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 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 -
RS Stock No. 423-090
Mfr. Part No.TPS2042BDGN
$2.772
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. 165-4064
Mfr. Part No.MIC2009YM6-TR
BrandMicrochip
$1.188
Each (On a Reel of 3000)
units
High Side 1 275mΩ Internally Limited 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. 177-0324
Mfr. Part No.MIC2075-1YMM
BrandMicrochip
$1.10
Each (In a Tube of 100)
units
USB High Side Power 1 160mΩ - MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C -
RS Stock No. 165-8557
Mfr. Part No.AP2145SG-13
$0.721
Each (On a Reel of 2500)
units
Low Side 2 140mΩ Internally Limited 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. 178-4282
Mfr. Part No.FSUSB242UCX
$0.446
Each (On a Reel of 3000)
units
USB 2 - WLCSP 9 - 1.26 x 1.26 x 0.31mm 1.26mm 1.26mm 0.31mm 5.5 V +85 °C -
RS Stock No. 662-2445
Mfr. Part No.TPS2045AD
$2.02
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. 133-0735
Mfr. Part No.TPS2559QWDRCTQ1
$4.85
Each (In a Pack of 2)
units
Power 3 13mΩ Internally Limited VSON 10 7460mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 6.5 V +125 °C -
RS Stock No. 146-4760
Mfr. Part No.AP22814BSN-7
$0.413
Each (In a Pack of 10)
units
High Side 1 65mΩ - U-DFN2020 5 + Tab 3.8A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C -
RS Stock No. 166-2527
Mfr. Part No.FSUSB30MUX
$0.358
Each (On a Reel of 4000)
units
- 1 10Ω - MSOP 10 - 3 x 3 x 1.1mm 3mm 3mm 1.1mm - +85 °C -
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