Automotive Single 8A/12A Step-Down Converter with High Efficiency

说明

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The MAX20011 is a family of high-efficiency, synchronous step-down converters that operate with a 3.0V to 5.5V input voltage range and supply a 0.5V to 1.275V output voltage range. The wide input/output voltage range and the ability to provide up to 12A peak output current make this device family ideal for on-board point-of-load and post-regulation applications. The MAX20011 achieves ±1.5% output error over load, line, and temperature ranges.

The MAX20011 features a 2.2MHz fixed-frequency PWM mode for better noise immunity and load-transient response. The 2.2MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The spread-spectrum frequency modulation option minimizes radiated electromagnetic emissions. Integrated low R_DS(ON) switches improve efficiency at heavy loads and make layout simpler than discrete solutions.

The MAX20011 is offered with factory-preset output voltage. See the Selector Guide for options. The I²C interface supports dynamic voltage adjustment with programmable slew rates. Other features include programmable soft-start, overcurrent, and overtemperature protections.

关键特性

• High-Efficiency DC-DC Converter
• Up to 12A peak output current:
  • MAX20011A: 8A
  • MAX20011B: 12A
• Differential Remote Voltage Sensing
• 3.0V to 5.5V Operating Supply Voltage
• I²C-Controlled Output Voltage: 0.5V to 1.275V in 6.25mV Steps
• Excellent Load-Transient Performance
• Programmable Compensation
• 2.2MHz or 1.1MHz Operation
• ±1.5% Output-Voltage Accuracy
• Active-Low RESET Output
• Current Mode, Forced PWM Operation
• ASIL D Compliant:
  • Redundant Reference
  • BIST Diagnostics
  • PEC on I²C
  • Programmable OV/UV with ±1% Accuracy
• Overtemperature and Short-Circuit Protection
• 3.5mm x 3.75mm 17-Pin Side-Wettable FC2QFN
• -40°C to +125°C Grade 1 Automotive Temperature Range

应用

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