The LT3501EFE#PBF is a dual-current mode PWM step-down DC/DC Converter with two internal 3.5A switches. Independent input voltage, feedback, soft-start and power good pins for each channel simplify complex power supply tracking/sequencing requirements. Both converters are synchronized to either a common external clock input or a resistor programmable fixed 250kHz to 1.5MHz internal oscillator. At all frequencies, a 180° phase relationship between channels is maintained, reducing voltage ripple and component size. Programmable frequency allows for optimization between efficiency and external component size. Minimum input-to-output voltage ratios are improved by allowing the switch to stay on through multiple clock cycles, only switching off when the boost capacitor needs recharging, resulting in ~95% maximum duty cycle. Each output can be independently disabled using its own soft-start pin or by using the SHDN pin the entire part can be placed in a low quiescent current shutdown mode.
● Independent supply to each regulator
● Antiphase switching
● Outputs can be paralleled
● Independent, sequential, ratiometric or absolute tracking between outputs
● Independent soft-start and power good pins
● Enhanced short-circuit protection
● 95% Maximum duty cycle low dropout
● <10µA Low shutdown current
● 2 Switching regulators with 3A output capability
