LT3510FE

Typical applications

description

LT^®The 3510 is a dual, current mode PWM step-down DC/DC converter with two internal 2.5A switches. Independent input voltage, feedback, soft-start, and power good pins for each channel simplify complex power tracking/sequencing requirements.

Both converters can be synchronized to a common external clock input or a fixed 250kHz to 1.5MHz internal oscillator that can be set with resistors. A 180° phase relationship is maintained between the two channels at all frequencies, reducing voltage ripple and component size. The programmable frequency allows optimization between efficiency and external component size.

By allowing the switch to be on for multiple clock cycles (only to be turned off when the boost capacitor needs to be recharged), the minimum input-to-output voltage ratio is improved, resulting in a maximum duty cycle of approximately 95%.

Each output can be independently disabled using its own soft-start pin, or the SHDN pin can be used to place the entire device in a low quiescent current shutdown mode.

The LT3510 is available in a 20-lead TSSOP package with exposed leadframe for low thermal resistance.