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3.0V to 5.5V Input, 6V to 18V Output, Synchronous Boost Converter

Industry's Only Automotive AEC-Q100 Grade 1 Qualified Fully Synchronous 18V Boost Converter

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主要特征

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参量

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 5.5
VOUT1 (V) (min) 6
VOUT1 (V) (max) 18
IOUT1 (A) (max) 4
Switch Type Internal
Output Adjust. Method Preset
Resistor
Power Good Signal Yes
Synchronous Switching? Yes
IQ (mA) (typ) 0.001
# DC-DC Outputs 1
Switching Frequency (kHz) 2200
Package/Pins TDFN-CU/14
Budgetary
Price (See Notes)
0

主要特征

  • Synchronous Boost Converter for Small Solution Size
    • 4.0A Peak Input Current
    • Resistor Adjustable Output Voltage from 6V to 18V
    • 6V to 18V Fixed Output Selection in 0.25V Steps
    • 3.0V to 5.5V Operating Supply Voltage
    • 2.2MHz Operation
    • Active-Low RESET Output
    • Spread Spectrum
  • High-Precision
    • ±1.5% Output Voltage Accuracy, Fixed
    • ±2.2% Output Voltage Accuracy, Adj
    • 81 ± 3% UV Monitoring
    • 121 ± 3% OV Monitoring
    • Good Load Transient Performance
  • Robust for the Automotive Environment
    • Current Mode, Forced PWM, and SKIP Operation
    • Over Temperature & Short Circuit Protection
    • 3mm x 3.5mm 14-Pin TDFN
    • -40°C to +125°C Automotive Temperature Range

应用/用途

  • Automotive Point of Load

描述

The MAX20474 is a high-efficiency DC-DC converter which boosts 3.0V to 5.5V input supply from 6V to 18V at up to 1A load. The boost converter achieves ±1.5% output error over load, line, and temperature range.

The device features a 2.2MHz fixed-frequency PWM mode for better noise immunity and load transient response as well as a pulse-frequency modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz 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 RDSON switches improve efficiency at heavy loads and make planning the layout a much simpler task with respect to discrete solutions.

Other features include true shutdown, soft-start, overcurrent, and over-temperature protections.

简化框图

MAX20474: Simplified Block Diagram MAX20474: Simplified Block Diagram 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