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. 146-4908
Mfr. Part No.AP22814AW5-7
HK$4.77
Each (In a Pack of 10)
units
High Side 1 65mΩ - Surface Mount SOT25 5 3.8A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS Stock No. 517-1078
Mfr. Part No.TPS2042AD
HK$26.95
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
RS Stock No. 165-4225
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
HK$1.827
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. 146-4807
Mfr. Part No.AP22814BM8-13
HK$4.77
Each (In a Pack of 10)
units
High Side 2 65mΩ - Surface Mount MSOP 8 3.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 2.4 V +85 °C
RS Stock No. 822-8821
Mfr. Part No.AP2331SA-7
HK$3.32
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. 460-758
Mfr. Part No.LM3525M-L/NOPB
HK$13.208
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. 761-9547
Mfr. Part No.LTC4090EDJC#PBF
HK$67.08
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. 905-4652
Mfr. Part No.1304
HK$52.44
Each
units
USB - - - Panel Mount - - 500mA 30 x 12.5 x 8mm 30mm 12.5mm 8mm 4.2 V -
RS Stock No. 920-3403
Mfr. Part No.TPS2044BD
HK$21.48
Each (In a Tube of 40)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW Surface Mount SOIC 16 1.25A 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 921-5074
Mfr. Part No.TPS2552DBVT
HK$11.063
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. 169-7369
Mfr. Part No.AP2401MP-13
HK$1.12
Each (On a Reel of 2500)
units
High Side 2 135mΩ Internally Limited Surface Mount MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 122-2931
Mfr. Part No.AP2156MPG-13
HK$3.85
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. 177-0721
Mfr. Part No.MIC2025-1YM
BrandMicrochip
HK$7.18
Each (In a Pack of 10)
units
USB High Side Power 1 160mΩ - Surface Mount SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C
RS Stock No. 662-2482
Mfr. Part No.TPS2065D
HK$13.35
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. 122-3271
Mfr. Part No.AP2411S-13
HK$1.022
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. 817-5840
Mfr. Part No.BQ24195RGET
HK$28.49
Each
units
High Side, Low Side 1 51mΩ - Surface Mount VQFN 24 9A 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V +85 °C
RS Stock No. 177-0315
Mfr. Part No.MIC2025-1YMM
BrandMicrochip
HK$4.18
Each (In a Tube of 100)
units
USB High Side Power 1 160mΩ - Surface Mount MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C
RS Stock No. 817-5587
Mfr. Part No.TS3USB31ERSER
HK$8.39
Each (On a Tape of 25)
units
High Side 1 - - Surface Mount UQFN 8 - 1.55 x 1.55 x 0.55mm 1.55mm 1.55mm 0.55mm 4.3 V +85 °C
RS Stock No. 162-7138
Mfr. Part No.TPS2041BDGN
HK$10.135
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. 169-0426
Mfr. Part No.BD6510F-E2
BrandROHM
HK$10.01
Each (On a Reel of 2500)
units
USB High Side Power 4 100mΩ 560 mW Surface Mount SOP 8 2A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm - -