MAX38643

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

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


Please check latest availability status for a specific part variant.

Description

The MAX38640/1/2/3 are nanoPower family of ultra-low 330nA quiescent current buck (step-down) DC-DC converters operating from 1.8V to 5.5V input voltage and supporting 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 MAX38640/1/2/3 are ideal for battery applications where long battery life is a must.

The MAX38640/1/2/3 family utilizes a unique control scheme that allows ultra-low quiescent current and high efficiency over a wide output current range. 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 MAX38640/1/2/3 devices are offered in a space-saving 1.42mm x 0.89mm 6-pin wafer-level package (WLP) (2 x 3 bumps, 0.4mm pitch), as well as a 2mm x 2mm, 6-pin µDFN package. All parts are specified from -40°C to +85°C.

Also see: nanoPower Technology ›

Design Solution: Make Your Small Asset Tracker Last Longer ›

MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit MAX38640, MAX38641, MAX38642, MAX38643: Typical Operating Circuit Enlarge+

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 and Coin Cell Battery Products
  • Wearable devices, Ultra-Low-Power IoT, NB IoT, and BLE
  • Wired, Wireless, Industrial Products
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX38640A 1.85.50.75.50.5V to 5V
Preset
Resistor
0.175InternalYes1
THIN WLP/6
UDFN/6
$0.70 @1k
MAX38641A 0.35
THIN WLP/6
UDFN/6
-
MAX38642A 0.35
THIN WLP/6
UDFN/6
-
MAX38643A 0.7
THIN WLP/6
UDFN/6
-
See All Step-Down Switching Regulators (402)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX38640EVKIT-WLP: Evaluation Kit for the MAX38640,MAX38641, MAX38642, MAX38643 in WLP
MAX38641AEVK-WLP: Evaluation Kit for the MAX38641 A in WLP
MAX38642AEVK-WLP: Evaluation Kit for the MAX38642 A in WLP
MAX38643AEVK-WLP: Evaluation Kit for the MAX38643 A in WLP
MAX38640AEVK-WLP: Evaluation Kit for the MAX38640 A in WLP
MAX38640AEVK-UDFN: Evaluation Kit for the MAX38640 A in μDFN
MAX38642AEVK-UDFN: Evaluation Kit for the MAX38642 A in μDFN
MAX38643AEVK-UDFN: Evaluation Kit for the MAX38643 A in μDFN
MAX38641AEVK-UDFN: Evaluation Kit for the MAX38641 A in μDFN

Technical Documents

Tutorial 2031 DC to DC Buck Converter Tutorial

Quality and Environmental Data

Request Reliability Report for: MAX38643 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Design Solution: Make Your Small Asset Tracker Last Longer ›
nanoPower Technology ›


Tools & Models

  • EE-Sim: Design & Simulate MAX38643
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
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    Type ID PDF Title
    Tutorial 2031 DC to DC Buck Converter Tutorial