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. 822-8830
Mfr. Part No.AP2401MP-13
$0.445
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. 186-1262
Mfr. Part No.FUSB307BVMPX
$1.17
Each (On a Reel of 3000)
units
USB - - - WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +105 °C -
RS Stock No. 162-7140
Mfr. Part No.TPS2062D
$2.83
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 -
New
RS Stock No. 208-8589
Mfr. Part No.LM3526MX-H/NOPB
$1.086
Each (On a Reel of 2500)
units
High Side 2 140mΩ 700 mW SOIC 8 - - - - - - - -
RS Stock No. 146-4807
Mfr. Part No.AP22814BM8-13
$0.783
Each (In a Pack of 10)
units
High Side 2 65mΩ - MSOP 8 3.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 2.4 V +85 °C -
RS Stock No. 730-0657
Mfr. Part No.TPS2540RTET
$3.01
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. 145-0390
Mfr. Part No.TPS2041BD
$1.18
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 -
RS Stock No. 177-0324
Mfr. Part No.MIC2075-1YMM
BrandMicrochip
$0.99
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. 910-1688
Mfr. Part No.MIC2009YM6-TR
BrandMicrochip
$1.34
Each (In a Pack of 5)
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. 177-0326
Mfr. Part No.MIC2075-2YMM
BrandMicrochip
$0.99
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. 122-2325
Mfr. Part No.AP2331SA-7
$0.179
Each (On a Reel of 3000)
units
High Side 1 350mΩ - SOT-23 3 0.5A 3 x 1.4 x 1.1mm 3mm 1.4mm 1.1mm 5.2 V +85 °C -
RS Stock No. 921-0489
Mfr. Part No.AP2552FDC-7
$0.539
Each (In a Pack of 10)
units
Low Side 1 150mΩ Internally Limited U-DFN2020 6 2542mA 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 5.5 V +85 °C -
RS Stock No. 121-9198
Mfr. Part No.TPS2051BDGN
$1.41
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. 165-4277
Mfr. Part No.MIC2026-2YM-TR
BrandMicrochip
$1.284
Each (On a Reel of 2500)
units
High Side 2 170mΩ Internally Limited SOIC 8 - 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
RS Stock No. 823-3185
Mfr. Part No.AP2411MP-13
$0.445
Each (In a Pack of 25)
units
High Side 1 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. 165-8557
Mfr. Part No.AP2145SG-13
$0.793
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. 177-0790
Mfr. Part No.MIC2075-2YM
BrandMicrochip
$1.41
Each (In a Pack of 10)
units
USB High Side Power 1 160mΩ - SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
RS Stock No. 171-3082
Mfr. Part No.TC7USB42MU
BrandToshiba
$0.518
Each (In a Pack of 25)
units
USB 2 14Ω 200 mW UQFN 10 50mA 1.4 x 1.8 x 0.5mm 1.4mm 1.8mm 0.5mm 4.3 V +85 °C -
RS Stock No. 177-0325
Mfr. Part No.MIC2075-2YM
BrandMicrochip
$1.293
Each (In a Tube of 95)
units
USB High Side Power 1 160mΩ - SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
RS Stock No. 122-2931
Mfr. Part No.AP2156MPG-13
$0.761
Each (On a Reel of 2500)
units
High Side 2 160mΩ Internally Limited MSOP 8 1A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
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