Analog Devices Inc. LTC3880, LTC2974, & LTC2977 Demo Board

Analog Devices Inc. LTC3880, LTC2974, and LTC2977 Demo Board is used to showcase the LTC3880, LTC2974, and LTC2977 devices. The LTC2974 and LTC2977 are I2C/ SMBus/PMBus power system managers with EEPROM. The LTC3880 is a dual output PolyPhase® step-down DC/DC controller with digital power system management. The LTC3880 monitors and controls 2 power supply rails, the LTC2974 monitors and controls 4 supplies, and the LTC2977 monitors and controls 8 supplies. The LTC3880, LTC2974, and LTC2977 Demo Board demonstrates these devices' ability to sequence, trim, margin, supervise, monitor, and log faults for fourteen power supplies. Each power supply channel's output voltage is monitored and each device monitors its own internal die temperature. Six channels have current and external temperature sensing.

The Analog Devices LTC3880, LTC2974, and LTC2977 Demo Board is supported by the LTpowerPlay® graphical user interface (GUI). LTpowerPlay is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products. The software supports a variety of different tasks like evaluating Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a multi-chip configuration file that can be saved and reloaded at a later time.


  • I2C/SMBus serial interface
  • PMBus compliant command set
  • Configuration EEPROM with CRC
  • Black box fault logging to internal EEPROM
  • Differential input, 16-Bit ΔΣ ADC with less than ±0.25% of total unadjusted error (±0.5% for LTC3880)
  • LTC2974 and LTC2977 utilize 10-bit trim DACs with Soft-Connect
  • Telemetry reads back VIN, IIN, VOUT, IOUT, temperature (Int. and Ext.)
  • Voltage servos precisely adjust supply voltages
  • Output sequencer - time based or tracking (tracking support on LTC2974 only)
  • Supports multichannel fault management
  • Operates autonomously without additional software
  • Powered from 6V to 14V
  • Packaging:
    • LTC2974/LTC2977 in 64-lead QFN
    • LTC3880 in 40-lead QFN


Published: 2017-12-08 | Updated: 2022-05-12