Analog Devices Inc. LTC3255 Inductorless Charge Pump Converters

Analog Devices Inc. LTC3255 Inductorless Charge Pump Converters are switched-capacitor step-down DC/DC converters that generate 2.4V to 12.5V adjustable output from a 4V to 48V input voltage. LTC3255's 2:1 capacitive charge pumping extends output current capability past input supply current limits in applications where the input voltage exceeds twice the output voltage. Burst Mode® operation reduces VIN quiescent current to 16μA at no load.

The devices' integrated VIN shunt regulator makes LTC3255 Converters from Analog Devices Inc. an excellent choice for 4mA to 20mA current loop applications. The converters offer current multiplication to allow a 4mA input current to power a 7.4mA load continuously. The LTC3255 Converters can serve as a higher efficiency replacement for linear regulators. The converters also offer a space-saving, inductor-free alternative to buck DC/DC converters.


  • 4V to 48V input voltage range
  • 2.4V to 12.5V adjustable regulated output
  • 50mA maximum output current
  • 16μA quiescent current in regulation at No Load
  • –52V to 60V input fault protection
  • Multimode charge pump (2:1, 1:1) with automatic mode switching maintains regulation over wide VIN range
  • Input voltage shunt mode for current-fed applications
  • Power good output
  • Overtemperature and short-circuit protection
  • +150°C maximum operating junction temperature
  • Thermally enhanced 10-lead MSOP and 10-lead (3mm × 3mm) DFN packages


  • Industrial control
  • Factory Automation
  • Sensors
  • SCADA systems
  • Housekeeping power supplies
  • Current-boosting voltage regulators for 4mA to 20mA current loops

LTC3255 Typical Application

Application Circuit Diagram - Analog Devices Inc. LTC3255 Inductorless Charge Pump Converters
Publicado: 2017-05-04 | Actualizado: 2022-03-24