Single-Phase Wide V Range DC/DC Controller for Intel IMVP-6/IMVP-6.5 CPUs

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, IMON 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.

Applications

* Embedded Computing

* Mobile Computers, Internet Devices

* Navigation Displays

* Supports 7-Bit IMVP-6/IMVP-6.5 VID Code and Features

* Wide VIN Range: 4.5V to 36V Operation with Optional Line Feedforward Compensation

* tON(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 VOUT 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