MAX38640

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 MAX3864xA/B 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 MAX3864xA/B are ideal for battery applications where long battery life is a must.

The MAX3864xA/B 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 MAX3864xA/B 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.
MAX38640A, MAX38640B, MAX38641A, MAX38641B, MAX38642A, MAX38642B, MAX38643A, MAX38643B: Functional Diagram MAX38640A, MAX38640B, MAX38641A, MAX38641B, MAX38642A, MAX38642B, MAX38643A, MAX38643B: Functional Diagram 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
    • Preprogrammed VOUT from 0.5V to 5V
    • Single Resistor Adjustable VOUT from 0.7V to 3.3V
    • ±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/Pins
minmaxminmax
MAX38640A NEW!1.85.50.75.50.5V to 5V
Preset
Resistor
0.15InternalYes1
WLP/6
MAX38641A NEW!
See Data Sheet
MAX38642A NEW!
See Data Sheet
MAX38643A NEW!
See Data Sheet
See All Step-Down Switching Regulators (363)
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 MAX38640A,MAX38640B, MAX38641A, MAX38641B, MAX38642A, MAX38642B, MAX38643A, MAX38643B in WLP

Quality and Environmental Data

Request Reliability Report for: MAX38640 
Lead-Free Package Tin (Sn) Whisker Reports
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.

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