Powrót do: Analog Devices Inc.

Analog Devices / Maxim Integrated MAX17505 Step-down DC-DC Converter

Analog Devices Inc. MAX17505 Step-down DC-DC Converter with dual integrated MOSFETs operates over a 4.5V to 60V input. It delivers up to 1.7A and 0.9V to 90%VIN output voltage. Built-in compensation across the output voltage range eliminates the need for external components. The device features a peak-current-mode control architecture with a MODE feature that can be used to operate the device in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) control schemes. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout. A programmable soft-start feature allows users to reduce input inrush current. 

The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage. The all-ceramic capacitor solution provides an ultra-compact layout with as few as eight external components.

Features

  • No schottky-synchronous operation for high efficiency and reduced cost
  • Internal compensation for stable operation at any output voltage
  • Wide 4.5V to 60V input voltage range
  • 0.9V to 90%VIN output voltage
  • Delivers up to 1.7A over temperature
  • 200kHz to 2.2MHz Adjustable frequency with external synchronization
  • Available in a 20-Pin, 4mm x 4mm TQFN package
  • Peak efficiency >90%
  • PFM and DCM Modes for high light-load efficiency
  • Shutdown current = 2.8µA (typ)
  • Hiccup-mode current limit and autoretry startup
  • Built-in output-voltage monitoring (open-drain active-low RESET pin)
  • Resistor-programmable EN/UVLO threshold
  • Adjustable soft-start and pre biased power-up
  • -40°C to +125°C operation

Applications

  • Base station power supplies
  • Distributed supply regulation
  • General-purpose point-of-load
  • High-voltage single-board systems
  • Industrial power supplies
  • Wall transformer regulation

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX17505 Step-down DC-DC Converter
Opublikowano: 2014-04-15 | Zaktualizowano: 2023-04-13