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
RS Stock No. 824-5490
Mfr. Part No.AP2152MPG-13
$2.06
Each (In a Pack of 5)
units
High Side 2 150mΩ Internally Limited 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. 122-3302
Mfr. Part No.AP2152MPG-13
$1.059
Each (On a Reel of 2500)
units
High Side 2 150mΩ Internally Limited 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. 517-1084
Mfr. Part No.TPS2044BD
$4.486
Each (In a Pack of 5)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW 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. 920-3403
Mfr. Part No.TPS2044BD
$3.33
Each (In a Tube of 40)
units
High Side, USB Power Distribution 8 70mΩ 898.47 mW 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. 809-4996
Mfr. Part No.FAN3989MLP8X
$1.64
Each (On a Tape of 5)
units
- 1 - - MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C -
RS Stock No. 166-2089
Mfr. Part No.FAN3989MLP8X
$0.799
Each (On a Reel of 3000)
units
- 1 - - MLP 8 1.5A 3 x 3 x 0.75mm 3mm 3mm 0.75mm 20 V +85 °C -
RS Stock No. 165-4312
Mfr. Part No.MIC2005A-1YM6-TR
BrandMicrochip
$0.294
Each (On a Reel of 3000)
units
High Side, USB Power Distribution 1 275mΩ Internally Limited SOT-23 6 0.9A 2.9 x 1.6 x 0.9mm 2.9mm 1.6mm 0.9mm 5.5 V +85 °C -
RS Stock No. 923-2461
Mfr. Part No.TPS2042BD
$1.65
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 49mΩ 585.82 mW 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. 921-0492
Mfr. Part No.AP2553AW6-7
$0.638
Each (In a Pack of 10)
units
High Side 1 135mΩ Internally Limited SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
RS Stock No. 460-792
Mfr. Part No.LM3526M-L/NOPB
$2.23
Each (In a Pack of 5)
units
High Side 4 100mΩ 700 mW SOIC 8 2.2A 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C -
RS Stock No. 100-0706
Mfr. Part No.LM3526M-L/NOPB
$2.808
Each (In a Tube of 95)
units
High Side 4 100mΩ 700 mW SOIC 8 2.2A 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C -
RS Stock No. 911-2723
Mfr. Part No.MIC2005A-1YM6-TR
BrandMicrochip
$0.322
Each (In a Pack of 25)
units
High Side, USB Power Distribution 1 275mΩ Internally Limited SOT-23 6 0.9A 2.9 x 1.6 x 0.9mm 2.9mm 1.6mm 0.9mm 5.5 V +85 °C -
RS Stock No. 812-0408
Mfr. Part No.TPS2511DGN
$2.07
Each (In a Pack of 10)
units
High Side 1 120mΩ Internally Limited MSOP 8 3330mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 162-7918
Mfr. Part No.TPS2511DGN
$2.07
Each (In a Tube of 80)
units
High Side 1 120mΩ Internally Limited MSOP 8 3330mA 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C -
RS Stock No. 165-8453
Mfr. Part No.AP2553AW6-7
$0.27
Each (On a Reel of 3000)
units
High Side 1 135mΩ Internally Limited SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C -
RS Stock No. 423-163
Mfr. Part No.TPS2042BD
$3.146
Each (In a Pack of 5)
units
High Side, USB Power Distribution 4 49mΩ 585.82 mW 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. 177-0596
Mfr. Part No.MIC2505-2YM
BrandMicrochip
$2.77
Each (In a Pack of 5)
units
- 1 75mΩ - 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. 163-0710
Mfr. Part No.NCP383LMUAJAATXG
$0.886
Each (On a Reel of 3000)
units
High Side 2 95Ω 850 mW UDFN 10 3.01A 3 x 3 x 0.5mm 3mm 3mm 0.5mm 5.5 V +85 °C -
RS Stock No. 145-6966
Mfr. Part No.TPS2051BD
$1.18
Each (In a Tube of 75)
units
High Side, USB Power Distribution 4 70mΩ 585.82 mW 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. 177-0721
Mfr. Part No.MIC2025-1YM
BrandMicrochip
$1.34
Each (In a Pack of 10)
units
USB High Side Power 1 160mΩ - SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C -
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