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Four-Output Mini PMICs for Camera Applications

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

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 4.5
VIN (V) (max) 36
# Step-Down Outputs 3
# LDO Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 3.9875
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
2.2
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Simplified Block Diagram

Technical Docs

Support & Training

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 4.5
VIN (V) (max) 36
# Step-Down Outputs 3
# LDO Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 3.9875
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
2.2

Key Features

  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
      • Input Voltage Range 5V to 36V
      • 3V to 4V, and 5V Output Voltage in 50mV Steps
    • 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
    • Active-Low 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

Applications/Uses

  • Front/Rear/Surround View Camera

Description

The MAX25249/MAX25249B are high-efficiency, four-output 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 step-down converter operating from power over coax or car battery. 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 active-low 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 factory-settable 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.

Simplified Block Diagram

Technical Docs

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.