Description

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Features: Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP® Compensation Minimizes COUT Dual N-Channel MOSFET Synchronous Drive ±1% Output Voltage Accuracy Power Good Output Voltage Monitor (LTC1628-PG) DC Programmed Fixed Frequency 150kHz to 300kHz Wide VIN Range: 3.5V to 36V Operation Very Low Dropout Operation: 99% Duty Cycle Adjustable Soft-Start Current Ramping Foldback Output Current Limiting Latched Short-Circuit Shutdown with Defeat Option Output Overvoltage Protection Remote Output Voltage Sense Low Shutdown IQ: 20µA 5V and 3.3V Standby Regulators Small 28-Lead SSOP Package Selectable Constant Frequency or Burst Mode® Operation Available in 5mm × 5mm QFN and 28-Pin SSOP Packages