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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

Product Details

Key Features

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 4
VOUT1 (V) (min) 4.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 1
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Power Good Signal Yes
Synchronous Switching? Yes
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 2
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
0.87
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Simplified Block Diagram

Technical Docs

Data Sheet Low-Voltage Synchronous Boost Converter Mar 23, 2021

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 .

Parameters

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 4
VOUT1 (V) (min) 4.5
VOUT1 (V) (max) 5.5
IOUT1 (A) (max) 1
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Power Good Signal Yes
Synchronous Switching? Yes
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 2
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=9718', '')
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
0.87

Key Features

  • 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)
  • 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

    Applications/Uses

    • Automotive CAN Transceivers
    • Automotive Point of Load

    Description

    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.

    Simplified Block Diagram

    MAX20471, MAX20472: Functional Diagram MAX20471, MAX20472:Functional Diagram Zoom icon

    Technical Docs

    Data Sheet Low-Voltage Synchronous Boost Converter Mar 23, 2021

    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 .