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: t_OFF(MIN) < 100ns
• Adjustable Cycle-by-Cycle Current Limit
• Undervoltage Lockout On Driver Supply
• Output Overvoltage Protection
• Thermally Enhanced 16-Pin TSSOP Package

Typical Application

Description

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 V_IN. A shutdown pin allows the LTC3814-5 to be turned off reducing the supply current to <230μA.