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

Small Automotive PMIC for ADAS Applications Requiring ASIL

产品详情

主要特征

Parametric specs for Multifunction PMICs
VIN (V) (min) 3
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 3.8
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
4.23
Parametric specs for Step-Down/Up Switching Regulators
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 0.8
Switch Type Internal
VOUT1 Tolerance (±%) 2
Synchronous Switching? Yes
Power Good Signal Yes
Alternate Topology Step-Down
Step-Up
Package/Pins TQFN-CU/24
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简化框图

Technical Docs

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参量

Parametric specs for Multifunction PMICs
VIN (V) (min) 3
VIN (V) (max) 5.5
# Step-Down Outputs 2
# Step-Up Outputs 1
VOUT (V) (min) 0.8
VOUT (V) (max) 3.8
Package/Pins TQFN-CU/24
Budgetary
Price (See Notes)
4.23
Parametric specs for Step-Down/Up Switching Regulators
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 0.8
Switch Type Internal
VOUT1 Tolerance (±%) 2
Synchronous Switching? Yes
Power Good Signal Yes
Alternate Topology Step-Down
Step-Up
Package/Pins TQFN-CU/24

主要特征

  • 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/用途

  • ADAS
  • 娱乐
  • SOC电源

描述

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.

简化框图

MAX20419: Typical Operating Circuit MAX20419: Typical Operating Circuit Zoom icon

Technical Docs

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