Analog Devices LTC7880

Description

The LTC®7880 is a dual PolyPhase® DC/DC synchronous step-up switching regulator controller with I2C-based PMBus compliant serial interface. This controller employs a constant-frequency, current-mode architecture, with high voltage input and output capability along with programmable loop compensation. The LTC7880 is supported by the LTpowerPlay™ software development tool with graphical user interface (GUI). Switching frequency, output voltage, and device address can be programmed both by digital interface as well as external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. The gate drive for the LTC7880 can be programmed from 6.3V to 9V to maximize efficiency. Both outputs have an independent power good indicator and FAULT function. The LTC7880 can be configured for discontinuous (pulseskipping) mode or continuous inductor current mode.

Features

• PMBus/I2C Compliant Serial Interface
  • Telemetry Read-Back Includes Input and Output Voltage and Current, Temperature and Faults
  • Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC, Frequency, and Control Loop Compensation
• Output Error Less Than ±0.5% Over Temperature
• Integrated 16-Bit ADC and 12-Bit DAC
• Internal EEPROM with ECC and Fault Logging
• Integrated N-Channel MOSFET Gate Drivers
• Power Conversion
  • Wide Input Voltage Range: 5V to 40V
  • Operates Down to 2.5V After Start-Up
  • VOUT0, VOUT1 Range: Up to 60V
  • Analog Current Mode Control
  • Accurate PolyPhase® Current Sharing for Up to 6 Phases (50kHz to 500kHz)
  • Available in a 52-Lead (7mm × 8mm) QFN Package

Typical applications

• Automotive Always-On and Start-Stop Systems / Industrial and Point of Load Applications

More information

• Datasheet
• IC product information