MAX20419

High-Efficiency, 3-Output, Low-Voltage DC-DC Converter

Small Automotive PMIC for ADAS Applications Requiring ASIL


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说明

The MAX20419 is a high-efficiency, 3-output, low-voltage DC-DC converter IC. OUT1 boosts the input supply to 5V at up to 750mA, while two synchronous step-down converters operate from a 3.0V to 5.5V input voltage range and provide a 0.8V to 3.8V output voltage range at up to 3.6A. The boost converter achieves ±1.9% and the buck converters achieve ±1.4% output error over load, line, and temperature range. The IC features a 2.2MHz fixed-frequency pulse-width modulation (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 frequency operation allows 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 the layout a much simpler task with respect to discrete solutions.

The IC is offered with factory-preset output voltages (see the Ordering Information/Selector Guide for available options). Other features include soft-start, overcurrent, and overtemperature protections. The MAX20419 also has several redundancy and diagnostic features for compatibility with ASIL-rated applications.

关键特性

  • Multiple Functions for Small Size
    • Synchronous 750mA Boost Converter
    • Fixed at 5V Output
    • Dual Synchronous Buck Converters Up to 3.6A
      • Factory-Configurable from 0.8V to 3.8V in 25mV Steps
    • Programmable Windowed Watchdog
    • 3.0V to 5.5V Operating Supply Voltage
    • 2.2MHz Operation
    • Individual Active-Low RESET_ Outputs
    • High-Precision Performance
      • ±1.9% Output-Voltage Accuracy (OUT1) and
      • ±1.4% Output-Voltage Accuracy (OUT2, OUT3)
      • ±1.3% OV/UV Monitoring (OUT1–OUT3, PV)
    • Excellent Load-Transient Performance
  • Diagnostics and Redundant Circuits
    • ASIL-C Compliant
    • Redundant Reference
    • Fail Safe on Open Pins
    • Shorted Pin Detection Active Low-RESET1–RESET3
    • Input Overvoltage Detection
  • Robust for the Automotive Environment
    • Current Mode, Forced-PWM and Skip Operation
    • Overtemperature and Short-Circuit Protection
    • 24-Pin (4mm x 4mm) TQFN with Exposed Pad
    • -40 °C to +125 °C Automotive Temperature Range

应用

  • ADAS
  • 娱乐
  • SOC电源
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins
minmaxminmax
MAX20419 
Step-Down
Step-Up
Step-Up/Down
Output OVP
Output UVP
Reset Output
Avg. Current Mode Control
Current Limit
Fixed Freq./PWM
Internal Switch
Sync. Rectifier
35.50.83.83.6
2000
2200
See Data Sheet
查看所有Multifunction PMICs (85)

Part NumberVOUT1
(V)
VOUT1
(V)
VOUT1 Tolerance
(±%)
IOUT1
(A)
IOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalAlternate TopologyPackage/Pins
minmax
MAX20419 0.85.320.83InternalYesYes
Step-Down
Step-Up
TQFN-CU/24
查看所有Step-Down/Up Switching Regulators (29)
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。


MAX20419EVKIT: Evaluation Kit for the MAX20419

质量和环境数据

申请可靠性报告: MAX20419 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX20419ATGB/V+
  • MAX20419ATGC/V+
  • MAX20419ATGD/V+
  • MAX20419ATGE/V+
  • 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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