DESCRIPTION
The LTC®1702 is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip, independent switching regulator controllers each designed to drive a pair of external N-channel MOSFET devices in a voltage mode feedback, synchronous buck configuration. The LTC1702 uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and maximizing load transient
performance. The synchronous buck architecture automatically shifts to discontinuous and then to Burst Mode™ operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents.

FEATURES
■ Two Independent Controllers in One Package
■ Two Sides Run Out-of-Phase to Minimize CIN
■ All N-Channel External MOSFET Architecture
■ No External Current Sense Resistors
■ Excellent Output Regulation: 1% Total Output Accuracy
■ 550kHz Switching Frequency Minimizes External Component Size
■ 1A to 25A Output Current per Channel
■ High Efficiency over Wide Load Current Range
■ Quiescent Current Drops Below 100µA in Shutdown
■ Small 24-Pin Narrow SSOP Package

APPLICATION
■ Microprocessor Core and I/O Supplies
■ Multiple Logic Supply Generator
■ Distributed Power Applications
■ High Efficiency Power Conversion