LTC3888-2
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LTC3888-2

Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

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Part Details
Part Models 4
1ku List Price Starting From $6.70
Features
  • PMBus/I2C Compliant Serial Interface
    • Monitor Voltage, Current, Temperature and Faults
    • Digitally Program VOUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing
  • Expandable to >16 Phases
  • 4.5V ≤ VIN ≤ 26.5V, 0.3V ≤ VOUT ≤ 3.45V
  • ±0.5% Output Voltage Accuracy
  • Programmable PWM Loop Compensation
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with ECC and Fault Logging
  • DrMOS Output Current Monitor Interface
  • DrMOS Temperature/Fault Bus Interface
  • DrMOS Gate Drive Supply Monitor
  • Load Step Emulation
  • Internal or External PWM Clock from 250kHz to 1MHz
  • 52-Pin (5mm × 8mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC3888/LTC3888-1/LTC3888-2 is a PMBus-compliant dual loop DC/DC synchronous step-down switching regulator controller with eight expandable phases supporting a wide range of master/slave configurations. The controller uses constant frequency current mode architecture to provide excellent transient response and output regulation. Each PWM master is capable of producing output voltages from 0.3V to 3.45V with multiple phase configurations using DrMOS devices that provide an output current monitor.

PMBus configuration and monitoring is supported by LTpowerPlay software. Programmable loop compensation and built-in load step emulation facilitate setting bandwidth based on input voltage and output load capacitance. PMBus commands allow read back of input voltage, output voltage and current, and operating status. Operating parameters can be set via PMBus command or stored in internal EEPROM for use at power up. Switching frequency, phase configuration, output voltage (LTC3888/LTC3888-2), output current limit (LTC3888-1) and device address can also be set using external programming resistors.

APPLICATIONS

  • High Current Distributed Power Systems
  • Servers, Network and Storage Equipment
Part Models 4
1ku List Price Starting From $6.70

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3888IUHG-2#PBF
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LTC3888IUHG-2#TRPBF
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LTC3888IUHG-2#WPBF
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LTC3888IUHG-2#WTRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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