Features

• Supports 7-Bit IMVP-6/IMVP-6.5 VID Code and Features
• Wide V_IN Range: 4.5V to 36V Operation with Optional Line Feedforward Compensation
• t_ON(MIN) < 35ns, Capable of Very Low Duty Cycle
• Temperature Compensated Inductor DCR or Sense Resistor Output Current Monitoring
• Differential Remote Output Voltage Sensing with Programmable Active Voltage Positioning
• Phase-Lockable Fixed Frequency: 150kHz to 550kHz
• Programmable UVLO, Preset V_OUT at Boot-Up
• Programmable Slow Slew Rate Sleep State Exit
• Internal LDO for Single Supply Operation
• Overvoltage and Overcurrent Protection
• PWRGD and VRTT# Thermal Throttling Flags
• Power Optimization During Sleep and Light Load
• 38-Pin Thermally Enhanced eTSSOP and 5mm × 7mm QFN Packages

Typical Application

Description

The LTC3816 is a single-phase synchronous step-down DC/DC switching regulator controller that drives N-channel power MOSFETs in a constant-frequency voltage mode architecture. The controller’s leading edge modulation topology allows extremely low output voltages and supports a phase-lockable switching frequency up to 550kHz. The output voltage is programmed using a 7-bit VID code.

The LTC3816 features all of the IMVP-6/IMVP-6.5 requirements, including start-up to a preset boot voltage, differential remote output voltage sensing with programmable active voltage positioning, I_MON output current reporting, power optimization during sleep state, and fast or slow slew rate sleep state exit.

Fault protection features include input undervoltage lockout, cycle-by-cycle current limit, output overvoltage protection, and PWRGD and overtemperature flags.