MAX38640

RECOMMENDED FOR NEW DESIGNS

Tiny 1.8V to 5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

Extends Battery life - 330nA Quiescent Current, 5nA Shutdown Current and 96% Peak Efficiency

Data Sheet (Rev. 11) Product Selection Table
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Overview

  • Extends Battery Life
    • 330nA Ultra-Low Quiescent Supply Current
    • 5nA Shutdown Current
    • 96% Peak Efficiency and over 88% at 10μA
  • Easy to Use – Addresses Popular Operation
    • 1.8V to 5.5V Input Range
    • Single Resistor-Adjustable VOUT from 0.7V to 3.3V (A-Option)
    • Preprogrammed VOUT from 0.5V to 5.0V (B-Option)
    • ±1.75% Output Voltage Accuracy
    • Up to 175mA/350mA/700mA Load Current
  • Protects System in Multiple Use Cases
    • Reverse-Current Blocking in Shutdown
    • Optional Active Discharge Feature
  • Reduces Size and Increases Reliability
    • -40°C to +85°C Temperature Range
    • 2mm x 2mm 6-pin µDFN Package
    • 1.42mm x 0.89mm, 0.4mm Pitch 6-pin (2 x 3) WLP
MAX38640
Tiny 1.8V to 5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter
MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit
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Documentation

Data Sheet 1

Design Note 1

Technical Articles 5

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Tools & Simulations

ADI Power Studio™ Designer

ADI Power Studio™ Designer is the next-generation tool for IC-level, power supply design, guiding engineers to faster, validated solutions.

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Evaluation Kits

MAX38642AEVK-WLP

Evaluation Kit for the MAX38642 A in WLP

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38642A in a 6-Pin WLP
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 350mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38642A evaluation kit (EV kit) evaluates the MAX38642A, an ultra-low quiescent current step-down DC-DC converter in a WLP. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 350mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38642AENT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

MAX38640AEVK-UDFN

Evaluation Kit for the MAX38640 A in μDFN

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38640A IC in a 6-pin µDFN
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 175mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38640A evaluation kit (EV kit) evaluates the MAX38640A, an ultra-low quiescent current step-down DC-DC converter in theµDFN package. The EV kit operates over an input rangeof 1.8V to 5.5V, and provides resistor-configurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 175mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38640AELT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

eval board
schematic 1
MAXESSENTIAL02EP

Essential Analog Efficient Power Toolkit for the MAXM38643 / MAX38640 / MAX77839 / MAXM17225 / MAX17227A / MAX38889 / MAX38902C / MAX38913 / MAX77827

Buy Now View Details

Features and Benefits

  • Enables Immediate Testing of Nine Different Power Solutions
  • Includes nanoPower Buck and Boost Converters and Modules, Buck/Boost Converter, LDOs, and Continua Supercapacitor Backup Power Controller
  • Boards Designed to Accept 0.100” (2.54mm) Header Pin Strips for Mounting on Breadboards
  • Through Holes Accept Test Points for Connecting to Benchtop Equipment

Product Details

The MAXESSENTIAL02EP Essential Analog Efficient Power toolkit delivers products on ready-to-use boards for immediate testing and prototyping. The Essential Analog Efficient Power toolkit features products from the Buck, Boost, Buck-Boost, LDO, and Continua™ product categories. The selection also features nanoPower switching converter and module options.

eval board
schematic 2
MAXESSENTIAL02EP

Essential Analog Efficient Power Toolkit for the MAXM38643 / MAX38640 / MAX77839 / MAXM17225 / MAX17227A / MAX38889 / MAX38902C / MAX38913 / MAX77827

Buy Now View Details

Features and Benefits

  • Enables Immediate Testing of Nine Different Power Solutions
  • Includes nanoPower Buck and Boost Converters and Modules, Buck/Boost Converter, LDOs, and Continua Supercapacitor Backup Power Controller
  • Boards Designed to Accept 0.100” (2.54mm) Header Pin Strips for Mounting on Breadboards
  • Through Holes Accept Test Points for Connecting to Benchtop Equipment

Product Details

The MAXESSENTIAL02EP Essential Analog Efficient Power toolkit delivers products on ready-to-use boards for immediate testing and prototyping. The Essential Analog Efficient Power toolkit features products from the Buck, Boost, Buck-Boost, LDO, and Continua™ product categories. The selection also features nanoPower switching converter and module options.

MAX38642AEVK-UDFN

Evaluation Kit for the MAX38642 A in μDFN

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38642A in a 6-pin µDFN
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 350mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38642A evaluation kit (EV kit) evaluates the MAX38642A, an ultra-low quiescent current step-down DC-DC converter in the µDFN package. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 350mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38642AELT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

MAX38641AEVK-UDFN

Evaluation Kit for the MAX38641 A in μDFN

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38641A in a 6-pin µDFN
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 350mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38641A evaluation kit (EV kit) evaluates the MAX38641A, an ultra-low quiescent current step-down DC-DC converter in the µDFN package. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 350mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38641AELT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

MAX38641AEVK-WLP

Evaluation Kit for the MAX38641 A in WLP

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38641A in a 6-Pin WLP
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 350mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38641A evaluation kit (EV kit) evaluates the MAX38641A, an ultra-low quiescent current step-down DC-DC converter in a WLP. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 350mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38641AENT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

MAX38643AEVK-WLP

Evaluation Kit for the MAX38643 A in WLP

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38643A in a 6-pin WLP
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 700mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38643A evaluation kit (EV kit) evaluates the MAX38643A, an ultra-low quiescent current step-down DC-DC converter in the wafer-level package (WLP). The EV kit operates over an input range of 1.8V to 5.5V, and provides resistor-configurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 700mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38643AENT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products

MAX38640AEVK-WLP

Evaluation Kit for the MAX38640 A in WLP

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38640A in a 6-pin WLP
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 175mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38640A evaluation kit (EV kit) evaluates the MAX38640A, an ultra-low quiescent current step-down DC-DC converter in a WLP. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 175mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38640AENT+ installed.

MAX38640EVKIT-WLP

Evaluation Kit for the MAX38640, MAX38641, MAX38642, MAX38643 in WLP

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38640/1/2/3 A/B IC Family in a 6-pin WLP
  • 1.8V to 5.5V Input Range
  • 0.7V to 3.3V Configurable Output Voltage
  • Up to 175mA/350mA/700mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38640 evaluation kit (EV kit) evaluates the MAX38640/1/2/3 A/B IC family of ultra-low quiescent current step-down DC-DC converters in the wafer-level package (WLP) . The EV kit operates over an input range of 1.8V to 5.5V, and provides resistor-configurable output voltages from 0.7V to 3.3V. The EV kit delivers up to 175mA/350mA/700mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38640AENT+ installed.

MAX38643AEVK-UDFN

Evaluation Kit for the MAX38643 A in μDFN

Buy Now View Details

Features and Benefits

  • Evaluates the MAX38643A in a 6-Pin µDFN
  • 1.8V to 5.5V Input Range
  • 1.0V to 3.3V Configurable Output Voltage
  • Up to 700mA Output Current
  • Proven 2-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Product Details

The MAX38643A evaluation kit (EV kit) evaluates the MAX38643A, an ultra-low quiescent current step-down DC-DC converter in the µDFN package. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistorconfigurable output voltages from 1.0V to 3.3V. The EV kit delivers up to 700mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX38643AELT+ installed.

Applications

  • Portable Space-Constrained Consumer Products
  • Single Li-ion and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products
MAX38642AEVK-WLP
Evaluation Kit for the MAX38642 A in WLP
MAX38640AEVK-UDFN
Evaluation Kit for the MAX38640 A in μDFN
MAXESSENTIAL02EP
Essential Analog Efficient Power Toolkit for the MAXM38643 / MAX38640 / MAX77839 / MAXM17225 / MAX17227A / MAX38889 / MAX38902C / MAX38913 / MAX77827
MAXESSENTIAL02EP Essential Analog Efficient Power Toolkit
MAXESSENTIAL02EP
Essential Analog Efficient Power Toolkit for the MAXM38643 / MAX38640 / MAX77839 / MAXM17225 / MAX17227A / MAX38889 / MAX38902C / MAX38913 / MAX77827
MAXESSENTIAL02EP Essential Analog Efficient Power Toolkit
MAX38642AEVK-UDFN
Evaluation Kit for the MAX38642 A in μDFN
MAX38641AEVK-UDFN
Evaluation Kit for the MAX38641 A in μDFN
MAX38641AEVK-WLP
Evaluation Kit for the MAX38641 A in WLP
MAX38643AEVK-WLP
Evaluation Kit for the MAX38643 A in WLP
MAX38640AEVK-WLP
Evaluation Kit for the MAX38640 A in WLP
MAX38640EVKIT-WLP
Evaluation Kit for the MAX38640, MAX38641, MAX38642, MAX38643 in WLP
MAX38643AEVK-UDFN
Evaluation Kit for the MAX38643 A in μDFN

Reference Designs

MAXREFDES1302
MAXREFDES1302
MAXREFDES1302 Circuits from the lab

Analog Devices 1-Wire True Wireless Stereo (TWS) Cradle and Earbuds

View Detailed Reference Design

Features and Benefits

Features

  • Integrated solution
  • Small size
  • Low power
  • High accuracy
  • Low cost
MAXREFDES1302
Analog Devices 1-Wire True Wireless Stereo (TWS) Cradle and Earbuds
MAXREFDES1302

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