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. 122-2931
Mfr. Part No.AP2156MPG-13
£0.344
Each (On a Reel of 2500)
Units
High Side 2 160mΩ Internally Limited Surface Mount MSOP 8 1A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 145-7797
Mfr. Part No.TPS2553DBVT
£0.801
Each (On a Reel of 250)
Units
USB Power Distribution 1 85mΩ 625 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. 165-8532
Mfr. Part No.AP2171SG-13
£0.12
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. 730-0657
Mfr. Part No.TPS2540RTET
£1.65
Each
Units
High Side 1 120mΩ Internally Limited Surface Mount 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. 100-0702
Mfr. Part No.LM3525M-L/NOPB
£1.178
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. 165-4225
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
£0.163
Each (On a Reel of 3000)
Units
High Side 1 275mΩ Internally Limited Surface Mount 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. 922-4725
Mfr. Part No.TPS2041BDBVT
£0.777
Each (On a Reel of 250)
Units
High Side, USB Power Distribution 2 95mΩ 285 mW Surface Mount SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C
RS Stock No. 709-8795
Mfr. Part No.TPS2553DBVT
£1.19
Each
Units
USB Power Distribution 1 85mΩ 625 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. 168-4137
Mfr. Part No.TPS2540RTET
£1.108
Each (On a Reel of 250)
Units
High Side 1 120mΩ Internally Limited Surface Mount 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. 662-2381
Mfr. Part No.TPS2041BDBVT
£1.136
Each (In a Pack of 5)
Units
High Side, USB Power Distribution 2 95mΩ 285 mW Surface Mount SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C
RS Stock No. 460-758
Mfr. Part No.LM3525M-L/NOPB
£1.436
Each (In a Pack of 5)
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. 921-0420
Mfr. Part No.AP2171SG-13
£0.124
Each (In a Pack of 20)
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. 923-2461
Mfr. Part No.TPS2042BD
£1.333
Each (In a Tube of 75)
Units
High Side, USB Power Distribution 4 49mΩ 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. 910-1809
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
£0.178
Each (In a Pack of 25)
Units
High Side 1 275mΩ Internally Limited Surface Mount 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. 662-2454
Mfr. Part No.TPS2051BD
£1.182
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. 812-0405
Mfr. Part No.TPS2500DRCT
£2.448
Each (In a Pack of 5)
Units
High Side, Low Side 1 120mΩ 2.4 W Surface Mount VSON 10 130 → 1400mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.25 V +85 °C
RS Stock No. 812-0408
Mfr. Part No.TPS2511DGN
£1.444
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. 460-792
Mfr. Part No.LM3526M-L/NOPB
£1.53
Each (In a Pack of 5)
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. 162-7135
Mfr. Part No.TPS2021D
£1.899
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. 662-2413
Mfr. Part No.TPS2021D
£2.234
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
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