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 Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature Automotive Standard
New
RS Stock No. 205-2423
Mfr. Part No.NCV81599MWTXG
$3.582
Each (In a Pack of 5)
units
Adjustable 2 - 4.1 W QFNW-32 32 - - - - - - - -
New
RS Stock No. 208-8589
Mfr. Part No.LM3526MX-H/NOPB
$1.086
Each (On a Reel of 2500)
units
High Side 2 140mΩ 700 mW SOIC 8 - - - - - - - -
RS Stock No. 809-9881
Mfr. Part No.ADP197ACBZ-R7
$2.22
Each (In a Pack of 5)
units
High Side 1 17mΩ - WLCSP 6 - 1.5 x 1 x 0.38mm 1.5mm 1mm 0.38mm 5.5 V +85 °C -
RS Stock No. 739-5144
Mfr. Part No.FSUSB42MUX
$0.92
Each
units
- 2 6.5Ω - MSOP 10 - 3 x 3 x 0.7mm 3mm 3mm 0.7mm - +85 °C -
RS Stock No. 146-4711
Mfr. Part No.AP22814AM8-13
$0.36
Each (On a Reel of 2500)
units
High Side 2 65mΩ - 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. 809-9887
Mfr. Part No.ADP198ACBZ-R7
$1.70
Each (On a Tape of 5)
units
High Side 1 90mΩ - WLCSP 4 - 0.99 x 1.065 x 0.37mm 0.99mm 1.065mm 0.37mm 6.5 V +85 °C -
RS Stock No. 864-4712
Mfr. Part No.FSUSB63UMX
$0.757
Each (On a Reel of 5000)
units
Multiplexer - - - UMLP 12 - 1.8 x 1.8 x 0.5mm 1.8mm 1.8mm 0.5mm - +85 °C -
RS Stock No. 921-0445
Mfr. Part No.AP2191SG-13
$1.46
Each (In a Pack of 10)
units
High Side 2 115mΩ Internally Limited SOIC 8 2.6A 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
$3.29
Each (In a Pack of 5)
units
USB High Side Power 4 180mΩ - 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. 146-4710
Mfr. Part No.AP22814BW5-7
$0.487
Each (On a Reel of 3000)
units
High Side 1 65mΩ - SOT25 5 3.8A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C -
RS Stock No. 709-8824
Mfr. Part No.TPS2552DBVT
$4.30
Each
units
USB Power Distribution 1 85mΩ 285 mW 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. 165-4087
Mfr. Part No.MIC2026-1YM
BrandMicrochip
$1.18
Each (In a Tube of 95)
units
High Side, USB Power Distribution 4 90mΩ Internally Limited 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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