Analog Devices MAX16956 Product Info

• 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 I_Q 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 V_IN 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

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.

Applications

• Automotive Body ECUs
• Distributed DC Power Systems
• Point-of-Load Applications