ADI LTC1702AIGN#TRPBF

The LTC1702A 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 Nchannel MOSFETs in a voltage mode feedback, synchronous buck configuration. The LTC1702A 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.

The LTC1702A features an onboard reference trimmed to 0.5% and can provide better than 1% regulation at the converter outputs. Open-drain logic outputs indicate whether either output has risen to within 5% of the final output voltage and an optional latching FAULT mode protects the load if the output rises 15% above the intended voltage. Each channel can be enabled independently; with both channels disabled, the LTC1702A shuts down and supply current drops below 100µA.

• Pin Compatible with the LTC1702 with Improved Current Limit Control
• Two Sides Run Out-of-Phase to Minimize GIN
• No External Current Sense Resistors
• Excellent Output Regulation: 1% Total Output Accuracy
• Two Independent Controllers in One Package
• All N-Channel External MOSFET Architecture
• 550kHz Switching Frequency Minimizes External Component Size
• 1A to 25A Output Current per Channel
• High Efficiency over Wide Load Current Range
• Less Than 100µA Shutdown Current
• Small 24-Pin Narrow SSOP Package

• Microprocessor, DSP Core and I/O Supplies
• Multiple Logic Supply Generator
• Distributed Power Applications
• High Efficiency Power Conversion