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. 905-4624
Mfr. Part No.1689
SGD35.20
Each
units
- - - - Panel Mount - - - 20 (L) x 38 (W)mm 20mm 38mm - - -
RS Stock No. 812-0408
Mfr. Part No.TPS2511DGN
SGD2.30
Each (In a Pack of 10)
units
High Side 1 120mΩ Internally Limited Surface Mount MSOP 8 3330mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 162-7918
Mfr. Part No.TPS2511DGN
SGD2.559
Each (In a Tube of 80)
units
High Side 1 120mΩ Internally Limited Surface Mount MSOP 8 3330mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 921-0442
Mfr. Part No.AP2191DWG-7
SGD0.589
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
RS Stock No. 145-0390
Mfr. Part No.TPS2041BD
SGD1.143
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW Surface Mount 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. 165-8542
Mfr. Part No.AP2191DWG-7
SGD0.49
Each (On a Reel of 3000)
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
RS Stock No. 527-366
Mfr. Part No.TPS2041BD
SGD1.308
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW Surface Mount 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. 165-4087
Mfr. Part No.MIC2026-1YM
BrandMicrochip
SGD0.933
Each (In a Tube of 95)
units
High Side, USB Power Distribution 4 90mΩ Internally Limited Surface Mount SOIC 8 0.9A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C
RS Stock No. 910-1509
Mfr. Part No.MIC2026-1YM
BrandMicrochip
SGD1.158
Each (In a Pack of 10)
units
High Side, USB Power Distribution 4 90mΩ Internally Limited Surface Mount SOIC 8 0.9A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C
RS Stock No. 145-1047
Mfr. Part No.TPS2148IDGN
SGD3.199
Each (In a Tube of 80)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W Surface Mount MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 841-7529
Mfr. Part No.UCS1003-2-BP
BrandMicrochip
SGD2.472
Each (In a Pack of 5)
units
- 2 55mΩ 2.19 W Surface Mount QFN 20 3000mA 4.1 x 4.1 x 0.9mm 4.1mm 4.1mm 0.9mm 5.5 V +125 °C
RS Stock No. 178-8835
Mfr. Part No.LM3526M-H/NOPB
SGD3.847
Each (In a Tube of 95)
units
High Side 4 100mΩ 700 mW Surface Mount 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. 662-2502
Mfr. Part No.TPS2148IDGN
SGD3.176
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W Surface Mount MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 739-5144
Mfr. Part No.FSUSB42MUX
SGD0.77
Each
units
- 2 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C
RS Stock No. 179-1649
Mfr. Part No.TPS2042AD
SGD6.864
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 80mΩ 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. 732-8106
Mfr. Part No.MAX893LESA+
BrandMaxim
SGD2.81
Each
units
High Side 2 160mΩ 471 mW Surface Mount SOIC 8 1.2A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 100-0702
Mfr. Part No.LM3525M-L/NOPB
SGD1.456
Each (In a Tube of 95)
units
High Side 3 80mΩ 700 mW Surface Mount SOIC 8 2.25A 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C
RS Stock No. 864-4743
Mfr. Part No.FSUSB42MUX
SGD0.414
Each (On a Reel of 4000)
units
- 1 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C
RS Stock No. 165-4209
Mfr. Part No.UCS1003-2-BP
BrandMicrochip
SGD2.286
Each (In a Tray of 490)
units
- 2 55mΩ 2.19 W Surface Mount QFN 20 3000mA 4.1 x 4.1 x 0.9mm 4.1mm 4.1mm 0.9mm 5.5 V +125 °C
RS Stock No. 517-1078
Mfr. Part No.TPS2042AD
SGD4.154
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 80mΩ 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
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