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Analog Devices / Maxim Integrated MAX38647B Miniature nanoPower Buck Converters

Analog Devices Inc. / Maxim Integrated MAX38647B Miniature nanoPower Buck Converters with 4-level VSEL step-down from an input voltage range of 1.8V to 5.5V to a wide 0.5V to 1.8V output range. These buck converters automatically switch between ultra-low-power mode (ULPM), low-power mode (LPM), and high-power mode (HPM) to service the load at the highest possible efficiency depending on the load current. The easy-to-use MAX38647B aids in extending battery life with 94% peak efficiency, supports 100% duty-cycle operation, and offers short-circuit protection and internal active discharge. MAX38647B is available in a 1.82mm x 0.89mm, 0.4mm pitch 8-bump WLP package or a 3mm2, 0.5mm pitch 10-pin TDFN package.

Features

  • Extends battery life
    • 440nA ultra-low quiescent supply current
    • 5nA shutdown current
    • 94% peak efficiency and over 90% at 10µA
  • Easy to use, addresses popular operation
    • 1.8V to 5.5V input voltage range
    • 0.5V to 1.8V output voltage range
    • Up to 175mA output current
  • Protects the system in multiple use cases
    • Short-circuit protection
    • Internal active discharge
  • Programmable single resistor (32x settings), 4x output voltage levels for each RSEL setting through digitally controlled VSEL1 and VSEL2 pins
  • EN pin for converter on/off control
  • 100% duty-cycle mode for low dropout operation
  • -40°C to +125°C operating temperature range
  • Package options
    • 8-bump WLP (1.82mm x 0.89mm, 0.4mm pitch)
    • 10-pin TDFN (3mm x 3mm, 0.5mm pitch)

Applications

  • Portable space-constrained consumer products
  • Wearable devices, including ultra-low-power IoT, NB IoT, and Bluetooth® LE
  • Single Li-ion and coin-cell battery products
  • Wired/wireless industrial products

Specifications

  • 1.8V to 5.5V input voltage range
  • 0.5V to 1.8V output voltage range
  • ±1.5% output accuracy
  • ±1.6ARMS maximum current
  • 175mA output current
  • 0.1µA maximum input shutdown current, 0.005µA typical
  • ±2.5% typical DC load regulation
  • 1ms typical soft-start time
  • 240µs to 1320µs select-resistor detection time range
  • 50Ω to 200Ω active discharge resistor range
  • 0.2A to 0.3A inductor peak current limit range
  • 12.5mA typical zero-crossing threshold
  • Continuous power dissipation
    • 912mW for the WLP package
    • 1951mW for the TDFN package
  • Temperatures
    • -40°C to +125°C operating range
    • +150°C maximum junction
    • Soldering
      • +300°C lead for 10s
      • +260°C reflow

Simplified Application Circuit

Application Circuit Diagram - Analog Devices / Maxim Integrated MAX38647B Miniature nanoPower Buck Converters

Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX38647B Miniature nanoPower Buck Converters

Related Development Tools

Analog Devices / Maxim Integrated MAX38647B WLP Evaluation Kit

Evaluates the characteristics of the MAX38647B IC in a wafer-level package (WLP).

Learn Moreacerca de Analog Devices / Maxim Integrated MAX38647B WLP Evaluation Kit View Productsrelacionado con Analog Devices / Maxim Integrated MAX38647B WLP Evaluation Kit
Publicado: 2023-06-15 | Actualizado: 2023-07-04