The LTC3858 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and noise due to the input capacitor ESR are minimized by operating the two controller outputs out of phase. The 170μA no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3858 features a precision 0.8V reference and a power good output indicator. A wide 4V to 38V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Independent soft-start pins for each controller ramp the output voltages during start-up. The output latch-off feature protects the circuit in short-circuit conditions. For a leaded 28-lead SSOP package with a fixed current limit and one PGOOD output, without phase modulation or a clock output, see the LTC3858-1 data sheet. LTC3858 LTC3858-1 LTC3858-2 Features Adjustable Current Limit, Clock Output, Phase Modulation, 2 PGOOD Outputs Fixed Current Limit, One PGOOD Output Overvoltage protection crowbar and short-circuit latchoff disabled Package QFN-32 SSOP-28 QFN-32 Applications * Automotive Systems * Battery Operated Digital Devices * Distributed DC Power Systems * Low Operating IQ: 170μA (One Channel On) * Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V * Wide VIN Range: 4V to 38V * RSENSE or DCR Current Sensing * Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise * OPTI-LOOP® Compensation Minimizes COUT * Phase-Lockable Frequency (75kHz-850kHz) * Programmable Fixed Frequency (50kHz-900kHz) * Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads https://elecena.pl/product/865986/low-i-dual-2-phase-synchronous-step-down-controller 2009-07-14 https://elecena.pl/product/865986/low-i-dual-2-phase-synchronous-step-down-controller 2014-06-27 https://elecena.pl/product/865986/low-i-dual-2-phase-synchronous-step-down-controller 2025-01-21