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Analog Devices / Maxim Integrated MAX77596 Synchronous Step-Down Buck Converter

Analog Devices MAX77596 Synchronous Step-Down Buck Converter delivers up to 300mA with input voltages from 3.5V to 24V. This uses only 1.1μA quiescent current at no load (fixed-output version). Voltage quality can be monitored by observing the active-low RESET signal. The Analog Devices MAX77596 can operate near dropout at 98% duty cycle. This feature makes it ideal for battery-powered applications.

The MAX77596 is offered in fixed 3.3V and 5V output versions and an adjustable version. The adjustable version allows users to program the output voltage between 1V and 10V using a resistor divider. Frequency is fixed at 1.7MHz, allowing small external components and reduced output ripple. The device offers both forced-PWM and skip-modes of operation, with an ultra-low quiescent current of 1.1μA in skip mode.

The Analog Devices MAX77596 is available in a small (2mm x 2.5mm) 10-pin TDFN package and operates across the -40°C to +85°C temperature range.

Features

  • Flexible power for systems that require a wide input voltage range
    • 3.5V to 24V VIN range 
    • Up to 300mA output current
    • Fixed 3.3V, 5V, or programmable 1V to 10V output voltage
    • 98% (Max) duty cycle operation with low dropout
    • Operates from 5V, 12V, or 20V USB Type-C input power
    • Operates from 2S, 3S, or 4S Li-Ion battery
  • Minimizes power consumption and extends battery life
    • 1.1μA quiescent current (3.3V fixed output voltage)
    • 86% peak efficiency at 12VIN, 3.3VOUT
  • Robust solution
    • Short-circuit, thermal protections
    • 6.67ms internal soft-start minimizes inrush current
    • Current-mode control architecture
    • Up to 42V input voltage tolerance
  • Minimizes solution size
    • 1.7MHz operating frequency
    • Small 2.0mm x 2.5mm x 0.75mm 10-pin TDFN package

Applications

  • Point-of-Load applications
  • USB Type-C devices
  • Portable devices powered from 2s, 3s, or 4s Li+ batteries

Videos

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX77596 Synchronous Step-Down Buck Converter

Application Circuit (Fixed)

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX77596 Synchronous Step-Down Buck Converter

Application Circuit (Variable)

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX77596 Synchronous Step-Down Buck Converter

Development Tool

Analog Devices / Maxim Integrated MAX77596EVKIT Evaluation Kit

Demonstrates the MAX77596 synchronous step-down converter IC with integrated switches.

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Inilathala: 2015-11-20 | Na-update: 2023-04-12