Back to Analog Devices Inc.

Analog Devices Inc. MAX77505 16A Low IQ Buck Converter

Analog Devices MAX77505 16A Low IQ Buck Converter is a low-quiescent current (800nA typ), high-efficiency hysteretic buck converter operating from a 2.5V to 16V input voltage range. The device offers high efficiency over the entire load range. Hence, it is ideal for either a primary battery or four alkaline battery-powered applications that require long standby/idling time with short working time, such as asset tracking and door-lock devices.

A resistor (RSEL) selects one of thirty preset output voltages between 0.8V and 5.5V. The device has input undervoltage lockout, cycle-by-cycle switch current limit, and thermal shutdown to protect the system and the device itself. The Analog Devices MAX77505 is available in a 10-lead FC2QFN package (2.0mm x 2.0mm x 0.55mm).

Features

  • 2.5V to 16V input voltage
  • 0.8V to 5.5V output voltage
  • Long battery life
    • 70nA shutdown current
    • 800nA ultra-low quiescent current (IQ)
    • 86% efficiency at 100μA load at 7.6VIN, 3.3VOUT
    • 95% peak efficiency at 7.6VIN, 3.3VOUT
  • POKB output (open-drain)
  • SEL pin for output voltage selection
  • Protections features
    • Cycle-by-cycle inductor peak current limit
    • Short circuit, Undervoltage Lockout (UVLO), and thermal protection
  • FC2QFN-10 package (2.0mm x 2.0mm x 0.55mm)

Applications

  • 2-3 cell Li+ battery applications
  • 4-cell alkaline battery applications
  • IoT, wearable devices
  • Smart meters, door locks, asset trackers, and more

Simplified Application Diagram

Application Circuit Diagram - Analog Devices Inc. MAX77505 16A Low IQ Buck Converter
Published: 2024-07-25 | Updated: 2025-03-25