Analog Devices Inc.

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Features: 180° Phased Dual Controllers Reduce Required Input Capacitance and Power Supply Induced Noise OPTI-LOOP® Compensation Minimizes COUT ±1.5% Output Voltage Accuracy over Temperature Dual N-Channel MOSFET Synchronous Drive Power Good Output Voltage Monitor DC Programmed Fixed Frequency 150kHz to 300kHz Wide VIN Range: 4.5V to 28V 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 Selectable Constant Frequency, Burst Mode® Operation or PWM Operation Small 28-Lead Narrow SSOP Package

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