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

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

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 1
VOUT1 (V) (max) 15
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2100
Design Tools EE-Sim
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.61
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 1
VOUT1 (V) (max) 15
IOUT1 (A) (max) 0.3
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2100
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=3183', '')
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.61

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 15V)
    • 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

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 15V 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.

Simplified Block Diagram

MAX16956: Block Diagram MAX16956: Block Diagram 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 .