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
New
RS Stock No. 178-4287
Mfr. Part No.FUSB303TMX
HK$1.811
Each (On a Reel of 5000)
units
USB 1 - - Surface Mount QFN 12 - 1.65 x 1.65 x 0.35mm 1.65mm 1.65mm 0.35mm 22 V +85 °C
RS Stock No. 169-7472
Mfr. Part No.AP2142SG-13
HK$6.704
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. 177-0314
Mfr. Part No.MIC2025-1YM
HK$5.552
Each (In a Tube of 95)
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. 423-090
Mfr. Part No.TPS2042BDGN
HK$15.904
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 1.71 W Surface Mount MSOP 8 1.25A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 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. 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. 146-4760
Mfr. Part No.AP22814BSN-7
HK$3.702
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. 145-9131
Mfr. Part No.MIC2076-2YM
BrandMicrochip
HK$6.949
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. 162-7142
Mfr. Part No.TPS2065D
HK$9.163
Each (In a Tube of 75)
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. 662-2502
Mfr. Part No.TPS2148IDGN
HK$27.324
Each (In a Pack of 5)
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. 154-7658
Mfr. Part No.LTC4090EDJC#PBF
HK$41.758
Each (In a Tube of 61)
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. 823-3185
Mfr. Part No.AP2411MP-13
HK$2.175
Each (In a Pack of 25)
units
High Side 1 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. 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. 171-2070
Mfr. Part No.BD6517F-E2
BrandROHM
HK$6.616
Each (On a Reel of 2500)
units
High Side 2 180Ω 670 mW Surface Mount SOP 8 1.65A 5 x 4.4 x 1.5mm 5mm 4.4mm 1.5mm 5.5 V +85 °C
RS Stock No. 709-8795
Mfr. Part No.TPS2553DBVT
HK$18.11
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. 905-4624
Mfr. Part No.1689
HK$238.65
Each
units
- - - - Panel Mount - - - 20 (L) x 38 (W)mm 20mm 38mm - - -
RS Stock No. 910-1688
Mfr. Part No.MIC2009YM6-TR
BrandMicrochip
HK$9.718
Each (In a Pack of 5)
units
High Side 1 275mΩ Internally Limited Surface Mount SOT-23 6 0.2 → 2A 2.9 x 1.6 x 1.3mm 2.9mm 1.6mm 1.3mm 5.5 V +85 °C
RS Stock No. 910-1809
Mfr. Part No.MIC2005A-1YM5-TR
BrandMicrochip
HK$1.989
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. 145-7715
Mfr. Part No.TPS2066CDGN
HK$9.699
Each (In a Tube of 80)
units
High Side 2 112mΩ Internally Limited Surface Mount MSOP 8 2.1A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
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