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Four Output Mini PMIC for Camera Applications

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

产品详情

主要特征

应用/用途

Parametric specs for Multifunction PMICs
VIN (V) (min) 5
VIN (V) (max) 22
# Step-Down Outputs 3
# Step-Up Outputs 0
# Inverting Outputs 0
# LDO Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 5
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
1.9
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参量

Parametric specs for Multifunction PMICs
VIN (V) (min) 5
VIN (V) (max) 22
# Step-Down Outputs 3
# Step-Up Outputs 0
# Inverting Outputs 0
# LDO Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 5
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
1.9

主要特征

  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
      • Input Voltage Range 5V to 22V
      • 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–Open-Drain
    • High-Precision
      • ±1.5% Output Voltage Accuracy
      • OV/UV Monitoring
  • 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

应用/用途

  • Rear-View Cameras
  • Surround-View Cameras

描述

The MAX25250 is a high-efficiency, four-output PMIC that integrates three DC-DC converters and a high-PSRR LDO, with OV/UV monitoring on all outputs. OUT1 is a1A 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 and errors are communicated through active-low RESET.

This device features 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 protection. The MAX25250 is specified for operation over the -40°C to +125°C automotive temperature range.

简化框图

MAX25250: Simplified Block Diagram MAX25250: Simplified Block Diagram Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心