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. 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. 165-4312
Mfr. Part No.MIC2005A-1YM6-TR
BrandMicrochip
HK$1.827
Each (On a Reel of 3000)
units
High Side, USB Power Distribution 1 275mΩ Internally Limited Surface Mount SOT-23 6 0.9A 2.9 x 1.6 x 0.9mm 2.9mm 1.6mm 0.9mm 5.5 V +85 °C
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. 145-9140
Mfr. Part No.MIC2076-1YM
BrandMicrochip
HK$8.598
Each (In a Tube of 95)
units
High Side, USB Power Distribution - - 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. 665-8894
Mfr. Part No.TPS2150IPWP
HK$33.46
Each (In a Pack of 5)
units
- - - Internally Limited Surface Mount HTSSOP 14 - 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm - +85 °C
RS Stock No. 133-0735
Mfr. Part No.TPS2559QWDRCTQ1
HK$20.005
Each (In a Pack of 2)
units
Power 3 13mΩ Internally Limited Surface Mount VSON 10 7460mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 6.5 V +125 °C
RS Stock No. 662-2451
Mfr. Part No.TPS2052BD
HK$12.246
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 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. 171-3082
Mfr. Part No.TC7USB42MU
BrandToshiba
HK$1.582
Each (In a Pack of 25)
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. 146-4762
Mfr. Part No.AP22804AW5-7
HK$4.38
Each (In a Pack of 10)
units
High Side 1 65mΩ - Surface Mount SOT25 5 3.3A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS Stock No. 177-0326
Mfr. Part No.MIC2075-2YMM
BrandMicrochip
HK$5.311
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. 169-7472
Mfr. Part No.AP2142SG-13
HK$5.026
Each (On a Reel of 2500)
units
High Side 2 160mΩ Internally Limited Surface Mount SOP 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 177-0778
Mfr. Part No.MIC2027-1YM
BrandMicrochip
HK$20.47
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. 824-5513
Mfr. Part No.AP2142SG-13
HK$10.70
Each (In a Pack of 5)
units
High Side 2 160mΩ Internally Limited Surface Mount SOP 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 146-4714
Mfr. Part No.AP22811BW5-7
HK$2.05
Each (On a Reel of 3000)
units
High Side 1 90mΩ - Surface Mount SOT25 5 3.2A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS Stock No. 165-4209
Mfr. Part No.UCS1003-2-BP
BrandMicrochip
HK$11.70
Each (In a Tray of 490)
units
- 2 55mΩ 2.19 W Surface Mount QFN 20 3000mA 4.1 x 4.1 x 0.9mm 4.1mm 4.1mm 0.9mm 5.5 V +125 °C
RS Stock No. 145-1047
Mfr. Part No.TPS2148IDGN
HK$22.42
Each (In a Tube of 80)
units
High Side, USB Power Distribution 2 340mΩ 1.46 W Surface Mount MSOP 8 0.4A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +85 °C
RS Stock No. 921-0414
Mfr. Part No.AP2152SG-13
HK$8.70
Each (In a Pack of 5)
units
High Side 2 160mΩ Internally Limited Surface Mount SOIC 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS Stock No. 910-1676
Mfr. Part No.MIC2026-1YM-TR
BrandMicrochip
HK$8.57
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. 146-4760
Mfr. Part No.AP22814BSN-7
HK$4.77
Each (In a Pack of 10)
units
High Side 1 65mΩ - Surface Mount U-DFN2020 5 + Tab 3.8A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C
RS Stock No. 165-4275
Mfr. Part No.MIC2026-1YM-TR
BrandMicrochip
HK$6.613
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
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