The LT8708 from Analog Devices is an 80V synchronous 4-switch buck-boost DC/DC controller designed to meet the growing demand for versatile, high-efficiency power management in modern applications. This innovative controller supports input voltages that can be above, below, or equal to the output voltage, making it adaptable to a wide range of power conversion scenarios. The LT8708's bidirectional capability makes it especially suitable for energy storage and power transfer in battery systems, capacitor backup, and automotive applications.

LT8708: Analog Devices’ Versatile 80V Buck-Boost DC/DC Controller-Chargerlab

Supporting six independent modes of regulation, the LT8708 allows for precise control of forward and reverse voltage and current, offering designers a new level of flexibility. With an input voltage range from 2.8V to 80V and an output range from 1.3V to 80V, this controller is compatible with various high-voltage systems, including 48V automotive and renewable energy applications. The chip’s efficient synchronous rectification enables conversion efficiencies of up to 99%, minimizing energy losses in demanding environments.

LT8708: Analog Devices’ Versatile 80V Buck-Boost DC/DC Controller-Chargerlab

The LT8708 is designed to operate in several modes, including Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM), Hybrid Conduction Mode (HCM), and Burst Mode®. Users can easily switch between these modes via the MODE and DIR pins, optimizing performance based on the specific application requirements. This configurability makes the LT8708 a robust choice for both steady and burst power demands.

Packaged in a 40-lead QFN, the LT8708 is AEC-Q100 qualified, underscoring its reliability in automotive and other rigorous environments. The controller’s high efficiency, broad operating range, and bidirectional capability mark it as a leader in high-power, high-reliability applications.

  • Input Voltage Range: 2.8V to 80V
  • Output Voltage Range: 1.3V to 80V
  • Regulation Modes: Six (VIN and VOUT for forward and reverse, VOUT and VIN voltage)
  • Operating Modes: DCM, CCM, HCM, and Burst Mode®
  • Efficiency: Up to 99%
  • Package: 40-lead (5mm × 8mm) QFN with high voltage pin spacing, also available in 64-lead (10mm × 10mm) eLQFP
  • Qualification: AEC-Q100 for automotive applications