Designers of USB Type-C small form factor devices can create always-on rails with the ultra-low quiescent current MAX77596 buck converter from Maxim Integrated Products.
Next-generation products that utilise the high data rates and increased power transfer capability of USB Type-C ports will require low-voltage supply rails to power necessary Type-C port controllers. Devices utilising the Power Delivery (PD) voltage range (5 V to 20 V) can generate an always-on (1,8 V/ 3,3 V/ 5,0 V) digital supply rail for the controller using the MAX77596. Operating from a supply as low as 3,5 V and as high as 24 V, the step-down converter can regulate from traditional 5 V USB power as well as the 20 V upper-end of the PD range.
The MAX77596 offers fixed 3,3 V and 5 V output versions, and an adjustable version that allows users to program the output voltage between 1 V and 10 V with a resistor-divider. The converter can support up to 300 mA DC loads, and integrates short-circuit and thermal protection, 6,67 ms internal soft-start minimising inrush current, proven current-mode control architecture, and up to 42 V input voltage tolerance.
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