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. 128-8866
Mfr. Part No.BD11600NUX-E2
BrandROHM
HK$5.528
Each (In a Pack of 10)
units
USB 1 1.92 W Surface Mount VSON 10 40µA 3 x 2 x 0.58mm 3mm 2mm 0.58mm 5.5 V +85 °C
RS Stock No. 162-7140
Mfr. Part No.TPS2062D
HK$14.251
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. 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. 739-5156
Mfr. Part No.FSUSB63UMX
HK$9.84
Each
units
Analogue - - - Surface Mount UMLP 12 - 1.8 x 1.8 x 0.5mm 1.8mm 1.8mm 0.5mm - +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. 177-0332
Mfr. Part No.MIC2505YM
BrandMicrochip
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. 145-7797
Mfr. Part No.TPS2553DBVT
HK$10.018
Each (On a Reel of 250)
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. 527-366
Mfr. Part No.TPS2041BD
HK$11.176
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. 146-4717
Mfr. Part No.AP22804AM8-13
HK$2.039
Each (On a Reel of 2500)
units
High Side 2 65mΩ - Surface Mount MSOP 8 3.3A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 2.4 V +85 °C
RS Stock No. 177-0323
Mfr. Part No.MIC2075-1YM
BrandMicrochip
HK$6.518
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. 824-5513
Mfr. Part No.AP2142SG-13
HK$8.808
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. 812-0405
Mfr. Part No.TPS2500DRCT
HK$26.096
Each (In a Pack of 5)
units
High Side, Low Side 1 120mΩ 2.4 W Surface Mount VSON 10 130 → 1400mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.25 V +85 °C
RS Stock No. 423-163
Mfr. Part No.TPS2042BD
HK$15.874
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 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. 761-5867
Mfr. Part No.LM3525M-H/NOPB
HK$13.16
Each (In a Pack of 5)
units
High Side 2 160mΩ 700 mW Surface Mount SOIC 8 - 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C
RS Stock No. 162-8092
Mfr. Part No.BQ24195RGET
HK$18.696
Each (On a Reel of 250)
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. 165-8557
Mfr. Part No.AP2145SG-13
HK$3.73
Each (On a Reel of 2500)
units
Low Side 2 140mΩ 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. 662-2473
Mfr. Part No.TPS2064DGN
HK$22.354
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 70mΩ 1.37 W Surface Mount MSOP 8 2.1A 3 x 3 x 1.02mm 3mm 3mm 1.02mm 5.5 V +70 °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
RS Stock No. 165-4087
Mfr. Part No.MIC2026-1YM
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. 162-7566
Mfr. Part No.TPS2150IPWP
HK$26.929
Each (In a Tube of 90)
units
- - - Internally Limited Surface Mount HTSSOP 14 - 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm - +85 °C
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