MAX16956

36V, 300mA, Mini Buck Converter with 1.1µA IQ

Industry's Lowest IQ Automotive Buck Converter Replaces Always-On LDO


Please check latest availability status for a specific part variant.

Description

The MAX16956 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 300mA with input voltages from 3.5V to 36V, while using only 1.1µA quiescent current at no load (fixed-output versions). Voltage quality can be monitored by observing the active-low RESET signal. The device can operate near dropout by running at 97% duty cycle, making it ideal for automotive applications under cold-crank.

The device offers fixed-output voltages of 5V and 3.3V, as well as an adjustable version. The adjustable version allows the user to program the output voltage between 1V and 10V by using a resistor-divider. Frequency is fixed at 2.1MHz, which allows for small external components, reduced output ripple, and minimized AM radio interference. The device offers both forced-PWM and skip modes of operation, with ultra-low quiescent current of 1.1µA in skip mode. The device can be ordered with spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the switching frequency.

The MAX16956 is available in a small (3mm × 3mm) 10-pin µMAX® package and operates across the full automotive temperature range of -40°C to +125°C. The device is AEC-Q100 qualified.

MAX16956: Block Diagram MAX16956: Block Diagram Enlarge+

Key Features

  • Integration and High-Switching Frequency Saves Space
    • DC-DC Converter Up to 300mA Capability
    • Fixed 5V/3.3V or Programmable Output-Voltage Options (1V to 10V)
    • Current-Mode-Control Architecture
    • 2.1MHz Operating Frequency
    • Fixed 5.4ms Internal Soft-Start
  • Spread-Spectrum Frequency Modulation Reduces EMI Emissions
  • Low IQ Enables Designers to Meet Stringent OEM Module Power-Consumption Requirements
    • 1.1µA Quiescent Current in Standby Mode (Fixed-Output-Voltage Versions Only)
  • Wide Input Voltage Range Supports Automotive Applications
    • Operating VIN Range: 3.5V to 36V (42V Tolerant)
    • 97% (Max) Duty-Cycle Operation with Low Dropout
  • Robust Performance Supports Wide Range of Automotive Applications
    • Short-Circuit, Thermal Protections
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified

Applications/Uses

  • Automotive Body ECUs
  • Distributed DC Power Systems
  • Point-of-Load Applications
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX16956 3.536110
3.3
5
Preset
Resistor
0.3InternalYes12100EE-Sim
UMAX/10
$2.46 @1k
See All Step-Down Switching Regulators (367)
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.


MAX16956EVKIT: Evaluation Kit for the MAX16956

Quality and Environmental Data

Product Reliability Reports: MAX16956.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX16956

Tools & Models

  • EE-Sim: Design & Simulate MAX16956
  • MAX16956 SIMPLIS Schematic
  • CAD Symbols and Footprints

  • MAX16956AUBA+
  • MAX16956AUBA+T
  • MAX16956AUBA/V+
  • MAX16956AUBA/V+T
  • MAX16956AUBB+
  • MAX16956AUBB+T
  • MAX16956AUBB/V+
  • MAX16956AUBB/V+T
  • MAX16956AUBC+
  • MAX16956AUBC+T
  • MAX16956AUBC/V+
  • MAX16956AUBC/V+T
  • MAX16956AUBD/V+
  • MAX16956AUBD/V+T
  • MAX16956AUBE/V+
  • MAX16956AUBE/V+T
  • MAX16956AUBF/V+
  • MAX16956AUBF/V+T
  • 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 >

     
    Status:
    Package:
    Temperature:

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