LTC3882 Datasheet | Linear Technology

Dual Output Poly Phase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management Features nn PMBus/I2C pliant Serial Interface nn Monitor Voltage, Current, Temperature and Faults nn Digitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds nn 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT ≤ 5.25V nn ±0.5% Output Voltage Accuracy nn Programmable PWM Frequency or External Clock Synchronization from 250k Hz to 1.25MHz nn Accurate Poly Phase® Current Sharing nn Internal EEPROM with Fault Logging and ECC nn IC Supply Range: 3V to 13.2V nn Resistor or Inductor DCR Current Sensing nn Optional Resistor Programming for Key Parameters nn 40-Pin (6mm × 6mm) QFN Package nn AEC-Q100 Qualified for Automotive Applications APPLICATIONS nn High Current Distributed Power Systems nn Servers, Network and Storage Equipment nn Intelligent Energy Efficient Power Regulation nn Industrial/Tele/ATE Systems DESCRIPTION The LTC®3882 is a dual, Poly Phase DC/DC synchronous step-down switching regulator controller with PMBus pliant serial interface. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages from 0.5V to 5.25V using a wide range of 3.3V patible power stages, including power blocks, Dr MOS or discrete FET drivers. Up to four LTC3882s can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation. LTC3882 system configuration and monitoring is supported by the LTpower Play® software tool. The device’s serial interface can be used to read back input voltage, output voltage and current, temperature and fault status. A wide range of operating parameters can be set via the digital interface or stored in internal EEPROM for use at power up. Switching frequency and phase, output voltage and device address can also be programmed using external configuration resistors. All registered...