The LT3501 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 fi xed 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 effi ciency 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. The LT3501 is available in a 20-lead TSSOP package with exposed leadframe for low thermal resistance. Applications * DSP Power Supplies * Disc Drives * DSL/Cable Modems * Wall Transformer Regulation * Distributed Power Regulation * Wide Input Range: 3.1V to 25V * Two Switching Regulators with 3A Output Capability * Independent Supply to Each Regulator * Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 1.5MHz * 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 * Low Dropout: 95% Maximum Duty Cycle * Low Shutdown Current: <10µA * 20-Lead TSSOP Package with Exposed Leadframe https://elecena.pl/product/247185/monolithic-dual-tracking-3a-step-down-switching-regulator 2007-03-01 https://elecena.pl/product/247185/monolithic-dual-tracking-3a-step-down-switching-regulator 2017-10-09 https://elecena.pl/product/247185/monolithic-dual-tracking-3a-step-down-switching-regulator 2025-01-20