MAX25249B

Quad Output Mini PMIC for Automotive Camera Applications

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


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说明

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 delivers 0.5A 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 increase flexibility for different image sensors and configurations. Other features include soft-start, overcurrent, and overtemperature protections. The MAX25249/MAX25249B are compliant to ASIL-B ratings and are specified for operation over the -40°C to +125°C automotive temperature range.

关键特性

  • Multiple Functions for Small Size
    • 1A Synchronous High-Voltage Buck Converter
      • Input Voltage Range 4.5V to 36V
      • 3V to 4V 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

应用

  • null
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins
minmaxminmax
MAX25249B NEW!Step-Down
Output OVP
Output UVP
Reset Output
Shutdown
Avg. Current Mode Control
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
Sync. Rectifier
4.5360.83.987511.22200
TQFN-CU/20
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX25249BEVKIT: Evaluation Kit for the MAX25249/MAX25249B
MAX25249EVKIT: Evaluation Kit for the MAX25249/MAX25249B

质量和环境数据

申请可靠性报告: MAX25249B 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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相关资料


MAX25249
Quad Output Mini PMIC for Automotive Camera Applications

  • Multiple Functions for Small Size
  • High-Precision
  • Diagnostics and Features

MAX25249B
Quad Output Mini PMIC for Automotive Camera Applications

  • Multiple Functions for Small Size
  • High-Precision
  • Diagnostics and Features

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