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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

Product Details

The MAX38640–MAX38643 are nanoPower family of ultra-low 330nA quiescent current buck (step-down) DC-DC converters that operate from 1.8V to 5.5V input voltage and support load currents of up to 175mA, 350mA, 700mA with peak efficiencies of 96%. While in shutdown, there is only 5nA of shutdown current. The devices offer ultra-low quiescent current, small total solution size, and high efficiency throughout the load range. The MAX38640–MAX38643 are ideal for battery applications where long battery life is a must.

The MAX38640–MAX38643 family utilizes a unique control scheme that allows ultra-low quiescent current and high efficiency over a wide output current range. The MAX38642 excludes active discharge resistor in shutdown which allows the output to be regulated or held high by another source or by the charged output capacitor.

The MAX38640–MAX38643 devices are offered in a space-saving 1.42mm x 0.89mm 6-pin WLP (2 x 3 bump, 0.4mm pitch), as well as a 2mm x 2mm, 6-pin µDFN package. All parts are specified over the -40°C to +85°C extended temperature range.

Also see: nanoPower Technology ›

Design Solution: Make Your Small Asset Tracker Last Longer ›

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Key Features

  • 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

Applications/Uses

  • Portable, Space-Constrained Consumer Products
  • Single Li-ion (Li+) and Coin Cell Battery Products
  • Wearable Devices, Ultra-Low-Power IoT, NB IoT, and Bluetooth® LE
  • Wired or Wireless Industrial Products
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.7
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.175
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Package/Pins THIN WLP/6
UDFN/6
Budgetary
Price (See Notes)
$0.70 @1k
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Simplified Block Diagram

MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

Description

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.

View Details

Features

  • 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

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EE-Sim: Design & Simulate MAX38640

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.7
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 0.175
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Package/Pins THIN WLP/6
UDFN/6
Budgetary
Price (See Notes)
$0.70 @1k

Key Features

  • 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

Applications/Uses

  • Portable, Space-Constrained Consumer Products
  • Single Li-ion (Li+) and Coin Cell Battery Products
  • Wearable Devices, Ultra-Low-Power IoT, NB IoT, and Bluetooth® LE
  • Wired or Wireless Industrial Products

Description

The MAX38640–MAX38643 are nanoPower family of ultra-low 330nA quiescent current buck (step-down) DC-DC converters that operate from 1.8V to 5.5V input voltage and support load currents of up to 175mA, 350mA, 700mA with peak efficiencies of 96%. While in shutdown, there is only 5nA of shutdown current. The devices offer ultra-low quiescent current, small total solution size, and high efficiency throughout the load range. The MAX38640–MAX38643 are ideal for battery applications where long battery life is a must.

The MAX38640–MAX38643 family utilizes a unique control scheme that allows ultra-low quiescent current and high efficiency over a wide output current range. The MAX38642 excludes active discharge resistor in shutdown which allows the output to be regulated or held high by another source or by the charged output capacitor.

The MAX38640–MAX38643 devices are offered in a space-saving 1.42mm x 0.89mm 6-pin WLP (2 x 3 bump, 0.4mm pitch), as well as a 2mm x 2mm, 6-pin µDFN package. All parts are specified over the -40°C to +85°C extended temperature range.

Also see: nanoPower Technology ›

Design Solution: Make Your Small Asset Tracker Last Longer ›

Mobile App

Simplified Block Diagram

MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal