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. 822-8821
Mfr. Part No.AP2331SA-7
R 6.49
Each (In a Pack of 25)
units
High Side 1 350mΩ Internally Limited Surface Mount 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. 527-366
Mfr. Part No.TPS2041BD
R 16.396
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. 910-1691
Mfr. Part No.MIC2026-2YM-TR
BrandMicrochip
R 16.791
Each (In a Pack of 10)
units
High Side 2 170mΩ Internally Limited Surface Mount SOIC 8 - 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C
RS stock no. 179-1647
Mfr. Part No.TPS2034D
R 35.574
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 3A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS stock no. 905-4652
Mfr. Part No.1304
R 104.94
Each
units
USB - - - Panel Mount - - 500mA 30 x 12.5 x 8mm 30mm 12.5mm 8mm 4.2 V -
RS stock no. 165-8346
Mfr. Part No.AP2511MP-13
R 2.324
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited Surface Mount MSOP 8EP 8 4.6A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS stock no. 761-9547
Mfr. Part No.LTC4090EDJC#PBF
R 136.72
Each
units
- 2 215mΩ - Surface Mount DFN 22 0.525A 6 x 3 x 0.75mm 6mm 3mm 0.75mm 5.5 V +85 °C
RS stock no. 160-4460
Mfr. Part No.ADP198ACBZ-R7
R 9.208
Each (On a Reel of 3000)
units
High Side 1 90mΩ - Surface Mount WLCSP 4 - 0.99 x 1.065 x 0.37mm 0.99mm 1.065mm 0.37mm 6.5 V +85 °C
RS stock no. 662-2413
Mfr. Part No.TPS2021D
R 41.096
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
R 35.16
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. 910-1809
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
R 3.89
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. 169-7370
Mfr. Part No.AP2401S-13
R 2.101
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited Surface Mount SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS stock no. 165-4277
Mfr. Part No.MIC2026-2YM-TR
BrandMicrochip
R 12.796
Each (On a Reel of 2500)
units
High Side 2 170mΩ Internally Limited Surface Mount SOIC 8 - 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C
RS stock no. 809-9887
Mfr. Part No.ADP198ACBZ-R7
R 19.086
Each (On a Tape of 5)
units
High Side 1 90mΩ - Surface Mount WLCSP 4 - 0.99 x 1.065 x 0.37mm 0.99mm 1.065mm 0.37mm 6.5 V +85 °C
RS stock no. 921-5074
Mfr. Part No.TPS2552DBVT
R 9.451
Each (On a Reel of 250)
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. 145-6966
Mfr. Part No.TPS2051BD
R 13.934
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. 662-2454
Mfr. Part No.TPS2051BD
R 16.396
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. 822-8833
Mfr. Part No.AP2401S-13
R 5.281
Each (In a Pack of 25)
units
High Side 2 135mΩ Internally Limited Surface Mount SOIC 8 2.85A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS stock no. 145-9132
Mfr. Part No.MIC2026-2YM
BrandMicrochip
R 14.097
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. 145-0390
Mfr. Part No.TPS2041BD
R 16.352
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