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 switchesMost 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. 146-1247
Mfr. Part No.MAX893LESA+
£1.08
Each (In a Tube of 100)
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. 732-8106
Mfr. Part No.MAX893LESA+
£1.65
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. 732-8746
Mfr. Part No.MAX1607ESA+
£1.27
Each
Units
High Side 1 150mΩ 471 mW Surface Mount SOIC 8 1A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
New
RS Stock No. 190-4413
Mfr. Part No.MAX4906FELB+T
£2.639
Each (On a Reel of 2500)
Units
- - 423.7 mW Surface Mount μDFN 10 - 2.05 x 2.05 x 0.55mm 2.05mm 2.05mm 0.55mm 3.6 V +85 °C
New
RS Stock No. 190-6478
Mfr. Part No.MAX4899AEETE+
£2.75
Each (In a Pack of 5)
Units
High Speed - 18Ω 1.67 W Surface Mount TQFN-EP 16 2mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 3.6 V +85 °C
RS Stock No. 169-8418
Mfr. Part No.MAX1607ESA+
£0.907
Each (In a Tube of 100)
Units
High Side 1 150mΩ 471 mW Surface Mount SOIC 8 1A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
New
RS Stock No. 190-4412
Mfr. Part No.MAX4899AEETE+
£3.176
Each (In a Tube of 100)
Units
High Speed - 18Ω 1.67 W Surface Mount TQFN-EP 16 2mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 3.6 V +85 °C
New
RS Stock No. 190-6493
Mfr. Part No.MAX4906FELB+T
£3.925
Each (In a Pack of 2)
Units
- - 423.7 mW Surface Mount μDFN 10 - 2.05 x 2.05 x 0.55mm 2.05mm 2.05mm 0.55mm 3.6 V +85 °C