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. 905-4652
Mfr. Part No.1304
PHP306.78
Each
units
USB - - - Panel Mount - - 500mA 30 x 12.5 x 8mm 30mm 12.5mm 8mm 4.2 V -
RS Stock No. 921-0492
Mfr. Part No.AP2553AW6-7
PHP20.90
Each (In a Pack of 10)
units
High Side 1 135mΩ Internally Limited Surface Mount SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
RS Stock No. 145-9400
Mfr. Part No.MIC2545A-1YM
BrandMicrochip
PHP147.792
Each (In a Tube of 95)
units
High Side, USB Power Distribution - - Internally Limited Surface Mount SOP 8 3A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C
RS Stock No. 165-8453
Mfr. Part No.AP2553AW6-7
PHP8.568
Each (On a Reel of 3000)
units
High Side 1 135mΩ Internally Limited Surface Mount SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
RS Stock No. 165-8558
Mfr. Part No.AP2191SG-13
PHP27.316
Each (On a Reel of 2500)
units
High Side 2 115mΩ Internally Limited Surface Mount SOIC 8 2.6A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 921-0445
Mfr. Part No.AP2191SG-13
PHP50.98
Each (In a Pack of 10)
units
High Side 2 115mΩ Internally Limited Surface Mount SOIC 8 2.6A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 662-2482
Mfr. Part No.TPS2065D
PHP81.90
Each (In a Pack of 5)
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. 162-7142
Mfr. Part No.TPS2065D
PHP68.575
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. 662-2413
Mfr. Part No.TPS2021D
PHP154.07
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 0.9A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 162-7135
Mfr. Part No.TPS2021D
PHP126.246
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 0.9A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 910-1868
Mfr. Part No.MIC2545A-1YM
BrandMicrochip
PHP163.09
Each (In a Pack of 2)
units
High Side, USB Power Distribution - - Internally Limited Surface Mount SOP 8 3A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C
RS Stock No. 147-360
Mfr. Part No.TPS2061D
PHP89.78
Each (In a Pack of 5)
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. 921-0489
Mfr. Part No.AP2552FDC-7
PHP20.90
Each (In a Pack of 10)
units
Low Side 1 150mΩ Internally Limited Surface Mount 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. 165-8532
Mfr. Part No.AP2171SG-13
PHP18.90
Each (On a Reel of 2500)
units
High Side 2 110mΩ Internally Limited Surface Mount U-DFN2018 6 1.9A 1.87 x 2.07 x 0.555mm 1.87mm 2.07mm 0.555mm 5.5 V +85 °C
RS Stock No. 121-9198
Mfr. Part No.TPS2051BDGN
PHP80.85
Each (In a Tube of 80)
units
High Side, USB Power Distribution 4 70mΩ 1.71 W Surface Mount MSOP 8 1.25A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 122-3267
Mfr. Part No.AP2111SG-13
PHP14.566
Each (On a Reel of 2500)
units
High Side 2 170mΩ Internally Limited Surface Mount SOIC 8 2.8A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 146-4839
Mfr. Part No.AP22811BW5-7
PHP24.41
Each (In a Pack of 10)
units
High Side 1 90mΩ - Surface Mount SOT25 5 3.2A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS Stock No. 709-8824
Mfr. Part No.TPS2552DBVT
PHP47.07
Each
units
USB Power Distribution 1 85mΩ 285 mW Surface Mount 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. 921-0442
Mfr. Part No.AP2191DWG-7
PHP18.679
Each (In a Pack of 20)
units
High Side 1 115mΩ Internally Limited Surface Mount SOT-25 5 2.6A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
New
RS Stock No. 202-7334
Mfr. Part No.NCP81599MNTXG
PHP38.579
Each (On a Reel of 2500)
units
Adjustable 1 - 4.1 W Surface Mount QFN32 32 - - - - - - -
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