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. 921-0385
Mfr. Part No.AP2111MPG-13
$0.553
Each (In a Pack of 20)
units
High Side 2 115mΩ Internally Limited MSOP 8EP 8 2.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 145-9133
Mfr. Part No.MIC2025-2YM
BrandMicrochip
$1.04
Each (In a Tube of 95)
units
High Side, USB Power Distribution 3 90mΩ Internally Limited SOIC 8 0.7A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C -
RS Stock No. 146-1247
Mfr. Part No.MAX893LESA+
$1.80
Each (In a Tube of 100)
units
High Side 2 160mΩ 471 mW SOIC 8 1.2A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 145-7797
Mfr. Part No.TPS2553DBVT
$1.868
Each (On a Reel of 250)
units
USB Power Distribution 1 85mΩ 625 mW SOT-23 6 1.2A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 6.5 V +85 °C -
RS Stock No. 133-0735
Mfr. Part No.TPS2559QWDRCTQ1
$4.74
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. 177-0316
Mfr. Part No.MIC2025-2YMM
BrandMicrochip
$0.81
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. 730-0657
Mfr. Part No.TPS2540RTET
$3.29
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. 146-4709
Mfr. Part No.AP22814BSN-7
$0.387
Each (On a Reel of 3000)
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. 177-0331
Mfr. Part No.MIC2505-2YM
BrandMicrochip
$2.63
Each (In a Tube of 95)
units
High Side 1 75mΩ - SOIC 8 4A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 7.5 V +85 °C -
RS Stock No. 864-4743
Mfr. Part No.FSUSB42MUX
$0.391
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. 165-4087
Mfr. Part No.MIC2026-1YM
BrandMicrochip
$1.284
Each (In a Tube of 95)
units
High Side, USB Power Distribution 4 90mΩ Internally Limited SOIC 8 0.9A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C -
RS Stock No. 169-8418
Mfr. Part No.MAX1607ESA+
$1.71
Each (In a Tube of 100)
units
High Side 1 150mΩ 471 mW SOIC 8 1A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C -
RS Stock No. 822-8821
Mfr. Part No.AP2331SA-7
$0.593
Each (In a Pack of 25)
units
High Side 1 350mΩ Internally Limited 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. 910-1506
Mfr. Part No.MIC2026-2YM
BrandMicrochip
$1.53
Each (In a Pack of 10)
units
High Side, USB Power Distribution 4 90mΩ Internally Limited SOIC 8 0.9A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C -
RS Stock No. 111-5720
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
$3.15
Each (In a Pack of 5)
units
USB Power Distribution - - - SQFN 32 - 5.1 x 5.1 x 0.95mm 5.1mm 5.1mm 0.95mm 6 V +70 °C -
RS Stock No. 665-8894
Mfr. Part No.TPS2150IPWP
$5.98
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. 165-4225
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
$0.352
Each (On a Reel of 3000)
units
High Side 1 275mΩ Internally Limited SOT-23 5 0.5A 2.9 x 1.6 x 1.3mm 2.9mm 1.6mm 1.3mm 5.5 V +85 °C -
RS Stock No. 662-2439
Mfr. Part No.TPS2041BDGN
$2.77
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. 146-4712
Mfr. Part No.AP22814BM8-13
$0.374
Each (On a Reel of 2500)
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. 162-7142
Mfr. Part No.TPS2065D
$2.03
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 -
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