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. 111-5720
Mfr. Part No.UPD1002-A/MQ
BrandMicrochip
HK$15.932
Each (In a Pack of 5)
units
USB Power Distribution - - - Surface Mount SQFN 32 - 5.1 x 5.1 x 0.95mm 5.1mm 5.1mm 0.95mm 6 V +70 °C
RS Stock No. 921-0401
Mfr. Part No.AP2145SG-13
HK$4.037
Each (In a Pack of 10)
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. 145-6966
Mfr. Part No.TPS2051BD
HK$7.126
Each (In a Tube of 75)
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. 805-7186
Mfr. Part No.NCP383LMUAJAATXG
HK$6.473
Each (In a Pack of 10)
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. 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. 146-4886
Mfr. Part No.AP22804AM8-13
HK$4.792
Each (In a Pack of 10)
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. 165-4209
Mfr. Part No.UCS1003-2-BP
BrandMicrochip
HK$12.395
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. 169-7367
Mfr. Part No.AP2191WG-7
HK$5.242
Each (On a Reel of 3000)
units
High Side 1 170mΩ Internally Limited Surface Mount SOT-25 5 2.6A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
RS Stock No. 517-1034
Mfr. Part No.TPS2022D
HK$20.726
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 33mΩ 725 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. 170-9001
Mfr. Part No.AP2152SG-13
HK$7.218
Each (On a Reel of 2500)
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. 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. 179-1647
Mfr. Part No.TPS2034D
HK$26.122
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 33mΩ 725 mW Surface Mount SOIC 8 3A 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 5.5 V +85 °C
RS Stock No. 517-1084
Mfr. Part No.TPS2044BD
HK$23.66
Each (In a Pack of 5)
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. 921-0442
Mfr. Part No.AP2191DWG-7
HK$3.267
Each (In a Pack of 20)
units
High Side 1 115mΩ Internally Limited Surface Mount SOT-25 5 2.6A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
RS Stock No. 910-1868
Mfr. Part No.MIC2545A-1YM
BrandMicrochip
HK$27.52
Each (In a Pack of 2)
units
High Side, USB Power Distribution - - Internally Limited Surface Mount SOP 8 3A 5 x 3.99 x 1.63mm 5mm 3.99mm 1.63mm 5.5 V +85 °C
RS Stock No. 923-2467
Mfr. Part No.TPS2043BD
HK$15.547
Each (In a Tube of 40)
units
High Side, USB Power Distribution 6 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. 165-8530
Mfr. Part No.AP2101MPG-13
HK$2.789
Each (On a Reel of 2500)
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. 761-9547
Mfr. Part No.LTC4090EDJC#PBF
HK$64.21
Each
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. 662-2381
Mfr. Part No.TPS2041BDBVT
HK$13.396
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. 177-0778
Mfr. Part No.MIC2027-1YM
HK$21.968
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
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