MAX25249B

RECOMMENDED FOR NEW DESIGNS

Four-Output Mini PMICs for Camera Applications

Industry's Smallest Power Solution for Automotive Cameras with Precision Monitoring

Data Sheet (Rev. 20) Product Selection Table
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Overview

  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
      • Input Voltage Range 5V to 36V
      • 3V to 4V in 50mV Steps
      • 5V Fixed Output Voltage
    • Two Synchronous Low-Voltage Buck Converters
      • OUT2 and OUT3 Provide up to 1.2A
      • 0.8V to 3.9875V in 12.5mV Steps
    • LDO for Camera Sensor; 50dB at 1kHz
    • 2.2MHz Operation
    • RESET Output – Push Pull or Open Drain
  • High Precision
    • ±1.5% Output Voltage Accuracy
    • ±1.3% OV/UV Monitoring Accuracy
  • Diagnostics and Features
    • ASIL B Compliant
    • Redundant Reference
  • Robust for the Automotive Environment
    • Current-Mode, Forced-PWM Operation
    • Overtemperature and Short-Circuit Protection
    • 3.5mm x 3.5mm 20-Pin TQFN
    • -40°C to +125°C Grade 1 Automotive Temperature Range
    • AEC-Q100 Qualified

The MAX25249/MAX25249B are high-efficiency, fouroutput PMICs that integrate three DC-DC converters and a high-PSRR LDO, with OV/UV monitoring on all outputs. OUT1 is a 1A high-voltage synchronous stepdown converter operating from power over coax or car battery. The OUT2 and OUT3 low-voltage synchronous step-down converters operate from OUT1 and provide a 0.8V to 3.9875V output voltage range. OUT2 can deliver 1.2A for high-megapixel cameras and high-speed serializers. OUT3 can deliver 1.2A to power the secondary rails of the imager, serializer, and MCU. OUT4 is a low-voltage, low-noise, high-PSRR LDO for imager power. All buck converters achieve ±1.5% output voltage accuracy over load, line, and temperature range. Overvoltage and undervoltage faults are monitored with ±1.3% accuracy around the set voltage, and errors are communicated through RESET.

The devices feature a 2.2MHz fixed-frequency PWM mode for better noise immunity and load-transient response. The high-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 and make layout simpler than discrete solutions. Sequencing through the use of EN23 and EN4 pins and factorysettable output voltages increases flexibility for different image sensors and configurations. Other features include soft-start, overcurrent, and overtemperature protections. The MAX25249/MAX25249B are compliant with ASIL B ratings and are specified for operation over the -40°C to +125°C automotive temperature range.

Applications

  • Surround-View Cameras
  • Rear-View Cameras
MAX25249B
Four-Output Mini PMICs for Camera Applications
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Documentation

Data Sheet 1

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Evaluation Kits

MAX25249BEVKIT

Evaluation Kit for the MAX25249/MAX25249B/MAX25250

Buy Now View Details

Features and Benefits

  • Meets Automotive Quality and Reliability Requirements
    • Wide Input Supply Range: 4.5V to 36V
    • -40°C to 125°C automotive temperature range
    • Overtemperature and short-circuit protection
  • High-Precision Output Voltages and ASIL Features
    • ASIL B Compliant
    • ±1.5% Accuracy for OUT1, OUT2, OUT3, and OUT4
    • ±1.3% Overvoltage- and Undervoltage-Monitoring Accuracy
  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
    • Two Synchronous Low-Voltage Buck Converters (1.2A and 0.5A)
    • Precision LDO for Camera Sensor
    • 2.2 MHz Forced-PWM Operation with Spread Spectrum
    • 3.5mm x 3.5mm 20-pin TQFN package
  • Fully Assembled and Tested

Product Details

The MAX25249 evaluation kit (EV kit) is a fully assembled and tested application circuit for the MAX25249/ MAX25249B high-efficiency four-output mini PMICs designed to power camera applications. The EV kit can test each of the outputs to full load. The output voltage accuracy is ±1.5% for all outputs within the normal operation input range of +4.5V to +36V. There is a active-low RESET signal to monitor overvoltage and undervoltage with ±1.3% accuracy. The MAX25249BEVKIT# is also available, and comes pre-installed with the MAX25249BATPB/VY+ IC.

Applications

  • Front/Rear/Surround View Camera

MAX25249EVKIT

Evaluation Kit for the MAX25249/MAX25249B/MAX25250

Buy Now View Details

Features and Benefits

  • Meets Automotive Quality and Reliability Requirements
    • Wide Input Supply Range: 4.5V to 36V
    • -40°C to 125°C automotive temperature range
    • Overtemperature and short-circuit protection
  • High-Precision Output Voltages and ASIL Features
    • ASIL B Compliant
    • ±1.5% Accuracy for OUT1, OUT2, OUT3, and OUT4
    • ±1.3% Overvoltage- and Undervoltage-Monitoring Accuracy
  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
    • Two Synchronous Low-Voltage Buck Converters (1.2A and 0.5A)
    • Precision LDO for Camera Sensor
    • 2.2 MHz Forced-PWM Operation with Spread Spectrum
    • 3.5mm x 3.5mm 20-pin TQFN package
  • Fully Assembled and Tested

Product Details

The MAX25249 evaluation kit (EV kit) is a fully assembled and tested application circuit for the MAX25249/ MAX25249B high-efficiency four-output mini PMICs designed to power camera applications. The EV kit can test each of the outputs to full load. The output voltage accuracy is ±1.5% for all outputs within the normal operation input range of +4.5V to +36V. There is a active-low RESET signal to monitor overvoltage and undervoltage with ±1.3% accuracy. The MAX25249BEVKIT# is also available, and comes pre-installed with the MAX25249BATPB/VY+ IC.

Applications

  • Front/Rear/Surround View Camera
MAX25249BEVKIT
Evaluation Kit for the MAX25249/MAX25249B/MAX25250
MAX25249EVKIT
Evaluation Kit for the MAX25249/MAX25249B/MAX25250

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