Analog Devices Inc. ADP244x Switching Regulators

Analog Devices Inc. ADP244x Synchronous, Step-down, DC-to-DC Switching Regulators feature an integrated 98mΩ, high-side power metal-oxide semiconductor field-effect transistor (MOSFET) and a 35mΩ, synchronous rectifier MOSFET. The ADP244x regulators operate from a 4.5V to 36V input voltage range. Designers can adjust the output voltage down to 0.6V as well as program the switching frequency from 200kHz to 1.8MHz. These high-power efficiency regulators deliver up to 3A of continuous current. 

Analog Devices ADP244x's fast 50ns minimum on time enables the regulators to convert high-input voltage to low-output voltage at high frequency. The regulators use an emulated current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. ADP244x's synchronization function enables the switching frequency to be synchronized with an external clock to minimize the system noise. Simple, reliable power sequencing is provided through the regulator's power-good output and precision-enable input.

The design of the ADP244x Switching Regulators provides a high-efficiency power solution with up to ±1 output accuracy in a 4mm x 4mm compact package.


  • 3A continuous output current
  • 4.5V to 36V input voltage range
  • 98mΩ/35mΩ integrated MOSFETs
  • 0.6V ± 1% reference voltage
  • 50ns fast minimum on-time
  • 200kHz to 1.8MHz programmable switching frequency
  • 200kHz to 1.8MHz synchronizes to external clock
  • Precision enable and power good
  • Cycle-by-cycle current limit with hiccup protection
  • External compensation
  • Programmable soft-start time
  • Startup into a pre-charged output


  • Point-of-load applications
  • Distributed power systems
  • Standard rail conversion to 24 V/12 V/5 V/3.3 V
  • Intermediate power rail conversion
  • Multi-cell battery powered systems
  • Process control and industrial automation
  • Healthcare and medical
  • Networking and servers
Published: 2017-04-25 | Updated: 2022-03-11