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.

Applications

* 24V Fan Supplies

* 48V Telecom and Base Station Power Supplies

* Networking Equipment, Servers

* Automotive and Industrial Control Systems

* 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