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LTC3814-5 - 60V Current Mode Synchronous Step-Up Controller

The LTC3814-5 is a synchronous step-up switching regulator controller that can generate output voltages up to 60V. The LTC3814-5 uses a constant off-time peak current control architecture to deliver very high duty cycles with accurate cycle-by-cycle current limit without requiring a sense resistor.

A precise internal reference provides ±0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3814-5 to drive large power MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN. A shutdown pin allows the LTC3814-5 to be turned off reducing the supply current to <230μA.

Features High Output Voltages: Up to 60V Large 1Ω Gate Drivers No Current Sense Resistor Required Dual N-Channel MOSFET Synchronous Drive ±0.5% 0.8V Voltage Reference Fast Transient Response Programmable Soft-Start Generates 5.5V Driver Supply Power Good Output Voltage Monitor Adjustable Off-Time/Frequency: tOFF(MIN) < 100ns Adjustable Cycle-by-Cycle Current Limit Undervoltage Lockout On Driver Supply Output Overvoltage Protection Thermally Enhanced 16-Pin TSSOP Package Typical Application

Applications 24V Fan Supplies 48V Telecom and Base Station Power Supplies Networking Equipment, Servers Automotive and Industrial Control Systems Packaging

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