Analog Devices Inc. LTC4020 55V Buck-Boost Battery Chargers

Analog Devices Inc. LTC4020 55V Buck-Boost Multi-Chemistry Battery Chargers offer high-efficiency battery charging over a wide voltage range of 4.5V to 55V input and 60V absolute maximum. These chargers are developed as a high-voltage power manager producing PowerPath™ instant-on operation and include an onboard buck-boost DC/DC controller. Battery charge requirements, input power supply limitations, and load variations are in response to the LTC4020 ideally managing power distribution between battery and converter outputs. Although the battery is fully discharged, the Analog Devices LTC4020 instant-on operation ensures system load power. Features include bad battery detection with auto-reset and an integrated timer for termination and protection.


  • 4.5V to 55V input wide voltage range, up to 55V output (60V absolute maximums)
  • Synchronous buck-boost DC/DC controller
  • Li-ion and lead-acid charge algorithms
  • ±0.5% float voltage accuracy
  • ±5% charge current accuracy
  • Instant-on for heavily discharged batteries
  • Ideal diode controller provides low loss PowerPath when input power is limited
  • Input voltage regulation for high impedance input supplies and solar panel peak power operation


  • Portable industrial and medical equipment
  • Solar-powered systems
  • Military communications equipment
  • 12V to 24V embedded automotive systems

Typical Application

Block Diagram - Analog Devices Inc. LTC4020 55V Buck-Boost Battery Chargers
Publicado: 2017-05-15 | Actualizado: 2023-03-05