ADI LTC7883AY#PBF

The LTC7883 is a quad, PolyPhase DC/DC synchronous step-down switching regulator controller with PMBus compliant 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 0.1V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. LTC7883 devices can operate in parallel, supporting ideal phasor positioning for PolyPhase rails up to 8-phases. System configuration and monitoring is supported by the LTpowerPlay software tool. The LTC7883 serial interfaces can read back input voltage, output voltage and current, temperature and fault status. Most operating parameters can be set via the digital interfaces or stored in internal EEPROM for use at power-up. Switching frequency and phase, output voltage and device address can also be set using external configuration resistors.

• PMBus/I2C Compliant Serial Interface
• Monitor Voltage, Current, Temperature and Faults
• Program Voltage, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV/OC Limits
• 3V ≤ VIN ≤ 38V, 0.1V (Limited by DrMOS tON) ≤ VOUT ≤ 5.25V ±0.5% Output Voltage Error
• Programmable PWM Frequency or External Clock Synchronization from 250kHz to 2.5MHz
• Accurate PolyPhase Current Sharing
• Internal EEPROM with Fault Logging and ECC
• IC Supply Range: 3V to 13.2V
• Resistor or Inductor DCR Current Sensing
• Power Good Output Voltage Monitor
• Supports Start-Up Into a Prebiased Load
• Optional Resistor Programming for Key Parameters
• 99-Lead BGA Package (9mm × 7.5mm)

• High Current Distributed Power Systems
• Servers, Network and Storage Equipment
• Intelligent Energy Efficient Power Regulation