DC3126A

Demonstration circuit 3126A is a quad power supply featuring the LT®8686S. The LT8686S is a 42V quad channel current mode monolithic synchronous step-down regulator. The LT8686S combines two 42V capable 2A buck regulators with two 8V capable 2A buck regulators. The demo board is designed for 5, 3.3, 1.8 and 1.2V outputs from a nominal 12V input with switching frequency set at 2MHz. The 5V & 3.3V converters are powered from a wide range of 6V to 42V. The 1.8V and 1.2V converters are powered from the 5V output by default or from 3V to 8V supply alternatively. The current capability is 2A for all 4 outputs when running individually. The DC3126A provides two 42V regulators that can be combined to deliver up to 4A of output current using a singular inductor. Similarly, the two 8V regulators can be combined to deliver up to 4A of output current using a singular inductor.

• User-selectable SYNC/MODE pin
• Demo board has an EMI filter
• Independent track/soft-start & power good for each o/p simplify complex design of quad o/p converter

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