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High-Voltage, 2.2MHz, 2A Automotive Step-Down Converter with Low Operating Current

2A Automotive Buck that Meets OEMs' Tight Power Budgets

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • Wide 3.5V to 28V Input Voltage Range
  • 42V Input Transient Tolerance
  • 5V Fixed or 1V to 10V Adjustable Output Voltage
  • Integrated 2A Internal High-Side Switch
  • Adjustable Switching Frequency (220kHz to 2.2MHz)
  • Operates Through Cold Crank with High Duty Cycle
  • Frequency Synchronization Input
  • Internal Boost Diode
  • 35µA Skip-Mode Operating Current
  • 5µA Typical Shutdown Current
  • Adjustable Power-Good Output Level and Timing
  • 3.3V Logic Level to 42V Compatible Enable Input
  • Current-Limit, Thermal-Shutdown, and Overvoltage Protections
  • Automotive Temperature Range: -40°C to +125°C
  • AEC-Q100 Qualified

Applications/Uses

  • Automotive
  • Industrial

Description

The MAX16974 is a 2A, current-mode, step-down converter with an integrated high-side switch. It is designed to operate with 3.5V to 28V input voltages, while using only 35µA quiescent current at no load. The switching frequency is adjustable from 220kHz to 2.2MHz by an external resistor and can be synchronized to an external clock. The output voltage is pin selectable to be 5V fixed or 1V to 10V adjustable. The wide input voltage range makes the device ideal for automotive and industrial applications.

The device operates in skip mode for reduced current consumption in light-load applications. An adjustable reset threshold helps keep microcontrollers alive down to their lowest specified input voltage. Protection features include cycle-by-cycle current limit, overvoltage, and thermal shutdown with automatic recovery. The device also features a power-good monitor to ease power-supply sequencing.

The device operates over the -40°C to +125°C automotive temperature range and is available in a 16-pin TSSOP-EP package.

Simplified Block Diagram

MAX16974: Typical Application Circuit MAX16974: Typical Application Circuit Zoom icon

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 .