MAX20472
Low-Voltage Synchronous Boost Converter
Industry's Only Automotive Synchronous Boost Converter with Up to 1A of Output Current and True Shutdown and Active-Low RESET Output
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Overview
Features and Benefits
- Multiple Functions for Small Size
- Synchronous Boost Converter
- 3.8V to 5.25V Output in 50mV Steps
- 500mA and 1AOutput Versions
- 3V to 4V Operating Supply Voltage
- True Output Shutdown
- 2.2MHz Operation for the MAX20471, MAX20472
- 2.0MHz Operation for the MAX20472B
- Open-Drain Reset Output Pin (Active-Low RESET)
- Spread-Spectrum Enable Pin (SSEN)
- Synchronous Boost Converter
- High Precision
- ±1.5% Output-Voltage Accuracy
- 93V ±2% Undervoltage Monitoring
- 107V ±2% Overvoltage Monitoring
- Good Load-Transient Performance
- Robust for the Automotive Environment
- Current-Mode, Forced-PWM, and Skip Operation
- Overtemperature and Short-Circuit Protection
- 12-Pin (3mm × 3mm) TDFN
- 12-Pin (3mm × 3mm) SWTDFN
- 8-Pin (0.150”) SOIC (MAX20471 Only)
- -40°C to +125°C Automotive Temperature Range
Product Details
The MAX20471, MAX20472, and MAX20472B are high-efficiency low-voltage DC-DC converters that boost a 3.0V to 4.0V input supply to between 3.8V and 5.25V (factory-configurable) at 500mA or 1A. The boost converters achieve ±1.5% output error over load, line, and temperature range.
The devices feature a 2.2MHz (2.0MHz for MAX20472B) fixed-frequency PWM mode for better noise immunity and load-transient response, and a pulse-frequency modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz/2.0MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads, which make the layout a much simpler task with respect to discrete solutions.
Other features include true shutdown, soft-start, overcurrent, and overtemperature protections.
Applications
- Automotive CAN Transceivers
- Automotive Point of Load
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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Boost Power Stage Design Equations8/19/2022
Tools & Simulations
EE-Sim® Power Tools
The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.
SIMPLIS Models
Design Resources
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.