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. 864-4743
Mfr. Part No.FSUSB42MUX
$0.43
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. 739-5144
Mfr. Part No.FSUSB42MUX
$0.93
Each
units
- 2 6.5Ω - MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C -
RS Stock No. 169-7370
Mfr. Part No.AP2401S-13
$0.22
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. 169-7369
Mfr. Part No.AP2401MP-13
$0.22
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
$0.47
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. 822-8830
Mfr. Part No.AP2401MP-13
$0.568
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. 662-2384
Mfr. Part No.TPS2051BDBVT
$2.546
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. 922-4729
Mfr. Part No.TPS2051BDBVT
$1.716
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. 460-803
Mfr. Part No.LM3526M-H/NOPB
$4.056
Each (In a Pack of 5)
units
High Side 2 100mΩ 700 mW SOIC 8 2.2A 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C -
RS Stock No. 145-9400
Mfr. Part No.MIC2545A-1YM
BrandMicrochip
$4.826
Each (In a Tube of 95)
units
High Side, USB Power Distribution - - Internally Limited SOP 8 3A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C -
RS Stock No. 146-4777
Mfr. Part No.AP22814BW5-7
$0.972
Each (In a Pack of 10)
units
High Side 1 65mΩ - SOT25 5 3.8A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C -
RS Stock No. 146-4908
Mfr. Part No.AP22814AW5-7
$0.972
Each (In a Pack of 10)
units
High Side 1 65mΩ - SOT25 5 3.8A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C -
RS Stock No. 145-1047
Mfr. Part No.TPS2148IDGN
$4.411
Each (In a Tube of 80)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C -
RS Stock No. 824-5513
Mfr. Part No.AP2142SG-13
$2.102
Each (In a Pack of 5)
units
High Side 2 160mΩ Internally Limited SOP 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C -
RS Stock No. 921-0442
Mfr. Part No.AP2191DWG-7
$0.676
Each (In a Pack of 20)
units
High Side 1 115mΩ Internally Limited SOT-25 5 2.6A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
RS Stock No. 662-2451
Mfr. Part No.TPS2052BD
$3.462
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. 165-8453
Mfr. Part No.AP2553AW6-7
$0.279
Each (On a Reel of 3000)
units
High Side 1 135mΩ Internally Limited SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
New
RS Stock No. 204-2528
Mfr. Part No.MAX77958EWV+
$3.378
Each (In a Pack of 5)
units
USB 1 - 24.4 mW WLP 6 - - - - - - - -
RS Stock No. 178-4289
Mfr. Part No.FUSB307BMPX
$0.85
Each (On a Reel of 3000)
units
USB 1 - - WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +85 °C -
RS Stock No. 162-8092
Mfr. Part No.BQ24195RGET
$3.872
Each (On a Reel of 250)
units
High Side, Low Side 1 51mΩ - VQFN 24 9A 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V +85 °C -
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