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. 809-9881
Mfr. Part No.ADP197ACBZ-R7
HK$11.516
Each (In a Pack of 5)
units
High Side 1 17mΩ - Surface Mount WLCSP 6 - 1.5 x 1 x 0.38mm 1.5mm 1mm 0.38mm 5.5 V +85 °C
RS Stock No. 163-0710
Mfr. Part No.NCP383LMUAJAATXG
HK$4.682
Each (On a Reel of 3000)
units
High Side 2 95Ω 850 mW Surface Mount UDFN 10 3.01A 3 x 3 x 0.5mm 3mm 3mm 0.5mm 5.5 V +85 °C
RS Stock No. 177-0790
Mfr. Part No.MIC2075-2YM
HK$8.932
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. 122-3270
Mfr. Part No.AP2411MP-13
HK$1.064
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. 162-6239
Mfr. Part No.LM3525M-H/NOPB
HK$10.445
Each (In a Tube of 95)
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. 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. 921-0414
Mfr. Part No.AP2152SG-13
HK$9.016
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
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. 146-4711
Mfr. Part No.AP22814AM8-13
HK$2.23
Each (On a Reel of 2500)
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. 177-0317
Mfr. Part No.MIC2027-1YM
HK$17.743
Each (In a Tube of 48)
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. 146-1247
Mfr. Part No.MAX893LESA+
BrandMaxim
HK$11.257
Each (In a Tube of 100)
units
High Side 2 160mΩ 471 mW Surface Mount SOIC 8 1.2A 5 x 4 x 1.5mm 5mm 4mm 1.5mm 5.5 V +85 °C
RS Stock No. 162-7566
Mfr. Part No.TPS2150IPWP
HK$29.786
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
RS Stock No. 166-2089
Mfr. Part No.FAN3989MLP8X
HK$4.715
Each (On a Reel of 3000)
units
- 1 - - Surface Mount MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C
RS Stock No. 162-7138
Mfr. Part No.TPS2041BDGN
HK$7.665
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. 662-2384
Mfr. Part No.TPS2051BDBVT
HK$10.70
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 95mΩ 285 mW Surface Mount SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C
RS Stock No. 122-3302
Mfr. Part No.AP2152MPG-13
HK$5.842
Each (On a Reel of 2500)
units
High Side 2 150mΩ Internally Limited Surface Mount MSOP 8 1A 3.1 x 3.05 x 0.95mm 3.1mm 3.05mm 0.95mm 5.5 V +85 °C
RS Stock No. 921-0420
Mfr. Part No.AP2171SG-13
HK$3.077
Each (In a Pack of 20)
units
High Side 2 110mΩ Internally Limited Surface Mount U-DFN2018 6 1.9A 1.87 x 2.07 x 0.555mm 1.87mm 2.07mm 0.555mm 5.5 V +85 °C
RS Stock No. 146-4706
Mfr. Part No.AP22814ASN-7
HK$2.309
Each (On a Reel of 3000)
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. 160-4460
Mfr. Part No.ADP198ACBZ-R7
HK$4.951
Each (On a Reel of 3000)
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
New
RS Stock No. 186-1507
Mfr. Part No.FUSB307BVMPX
HK$27.472
Each (In a Pack of 5)
units
USB - - - Surface Mount WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +105 °C
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