DC1161B - Schematic6/13/201258K
Demo circuit 1161B is a triple monolithic step-down regulator with LDO featuring LT3507. The demo circuit is designed for 1.8V, 3.3V, 5.0V and 2.5V outputs from a 7V to 36V input. The current capability of each channel is 2.4A, 1.3A, 1.4A and 0.2A respectively. Independent input voltage, feedback, soft-start and power good pins for each channel simplify complex power supply tracking/sequencing requirements.
All three converters are either synchronized to a common external clock input or single-resistor programmable from 250kHz to 2.5MHz using internal oscillator. At all frequencies, a 180° phase shift between VOUT1 and the other two outputs is maintained, reducing input voltage ripple and component size. Programmable frequency allows for optimization between efficiency and external component size.
DC1161B - Demo Manual5/10/2011457K
DC1161B - Design Files6/13/2012ZIP403K