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. 809-9887
Mfr. Part No.ADP198ACBZ-R7
HK$8.536
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. 145-9132
Mfr. Part No.MIC2026-2YM
BrandMicrochip
HK$6.177
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. 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 - -
RS Stock No. 921-0442
Mfr. Part No.AP2191DWG-7
HK$2.881
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. 165-4275
Mfr. Part No.MIC2026-1YM-TR
BrandMicrochip
HK$5.651
Each (On a Reel of 2500)
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. 165-4225
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
HK$1.82
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. 177-0331
Mfr. Part No.MIC2505-2YM
HK$13.518
Each (In a Tube of 95)
units
High Side 1 75mΩ - Surface Mount SOIC 8 4A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 7.5 V +85 °C
RS Stock No. 177-0778
Mfr. Part No.MIC2027-1YM
HK$20.36
Each (In a Pack of 5)
units
USB High Side Power 4 180mΩ - Surface Mount SOIC 16 1A 9.93 x 3.94 x 1.48mm 9.93mm 3.94mm 1.48mm 5.5 V +85 °C
RS Stock No. 822-8824
Mfr. Part No.AP2191WG-7
HK$5.953
Each (In a Pack of 10)
units
High Side 1 170mΩ 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. 171-3040
Mfr. Part No.TC7USB42MU
BrandToshiba
HK$1.308
Each (On a Reel of 3000)
units
USB 2 14Ω 200 mW Surface Mount UQFN 10 50mA 1.4 x 1.8 x 0.5mm 1.4mm 1.8mm 0.5mm 4.3 V +85 °C
RS Stock No. 177-0596
Mfr. Part No.MIC2505-2YM
HK$17.16
Each (In a Pack of 5)
units
- 1 75mΩ - Surface Mount SOIC 8 4A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 7.5 V +85 °C
New
RS Stock No. 186-1487
Mfr. Part No.FSA1153UCX
HK$8.304
Each (In a Pack of 10)
units
USB - - Surface Mount WLCSP 12 - 1.605 x 1.44 x 0.42mm 1.61mm 1.44mm 0.42mm 5.5 V +85 °C
RS Stock No. 921-0376
Mfr. Part No.AP2101MPG-13
HK$3.485
Each (In a Pack of 20)
units
Low Side 2 115mΩ Internally Limited Surface Mount MSOP 8EP 8 2.8A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS Stock No. 166-2527
Mfr. Part No.FSUSB30MUX
HK$1.854
Each (On a Reel of 4000)
units
- 1 10Ω - Surface Mount MSOP 10 - 3 x 3 x 1.1mm 3mm 3mm 1.1mm - +85 °C
RS Stock No. 162-8090
Mfr. Part No.BQ24190RGET
HK$22.515
Each (On a Reel of 250)
units
High Side, Low Side 1 20mΩ - Surface Mount VQFN 24 9A 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V +85 °C
New
RS Stock No. 178-4282
Mfr. Part No.FSUSB242UCX
HK$2.177
Each (On a Reel of 3000)
units
USB 2 - Surface Mount WLCSP 9 - 1.26 x 1.26 x 0.31mm 1.26mm 1.26mm 0.31mm 5.5 V +85 °C
RS Stock No. 662-2489
Mfr. Part No.TPS2066D
HK$17.65
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. 922-4738
Mfr. Part No.TPS2052BD
HK$9.527
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. 165-8453
Mfr. Part No.AP2553AW6-7
HK$3.102
Each (On a Reel of 3000)
units
High Side 1 135mΩ Internally Limited Surface Mount SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
RS Stock No. 177-0562
Mfr. Part No.MIC2075-1YMM
HK$5.915
Each (In a Pack of 20)
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
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