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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

Product Details

Key Features

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)
1
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Simplified Block Diagram

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Parameters

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)
1

Key Features

  • 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

Applications/Uses

  • Automotive Point of Load

Description

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.

Simplified Block Diagram

MAX20474: Simplified Block Diagram MAX20474: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .