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Automotive, 36V, 4A/5A/6A Fully Integrated Synchronous Buck Converter

Industry's Smallest High Power Step Down Converter with High Efficiency

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 42
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 10
IOUT1 (A) (max) 6
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Preset or Adj
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) .01
# DC-DC Outputs 1
Switching Frequency (kHz) 400
2100
3000
Design Tools EE-Sim
Package/Pins FC2QFN/17
Budgetary
Price (See Notes)
2.01
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 42
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 10
IOUT1 (A) (max) 6
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Preset or Adj
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (typ) .01
# DC-DC Outputs 1
Switching Frequency (kHz) 400
2100
3000
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=25871', '')
Package/Pins FC2QFN/17
Budgetary
Price (See Notes)
2.01

Key Features

  • Multiple Functions for Small Size
    • Operating VIN Range of 3V to 36V
    • 10µA Quiescent Current in Skip Mode
    • Synchronous DC-DC Converter with Integrated FETs
    • 400kHz, 2.1MHz, and 3MHz Fixed Frequency Options
    • Fixed 2.5ms Internal Soft-Start
    • Programmable 0.8V to 10V Output, or 3.3V and 5.0V Fixed-Output Options Available
    • 3.5mm x 3.75mm 17-Pin FC2QFN
    • Symmetrical package offers superior EMI performance
  • Dual-Phase Capablity
    • Can be used in Dual-Phase Configuration for High Power Design
    • Dynamic Current Sharing
    • Low Iq Operation Capability in Dual Phase
  • High Precision
    • ±1% Output-Voltage Accuracy in FPWM Mode at No Load
    • Precise Output Voltage Monitoring with PGOOD
  • Robust for the Automotive Environment
    • Forced-PWM and Skip Mode Operation
    • 99% Duty-Cycle Operation with Low Dropout
    • Overtemperature and Short-Circuit Protection
    • -40°C to +125°C Junction Operating Temperature Range
    • 42V Load-Dump Tolerant
    • AEC-Q100 Qualified

Applications/Uses

  • Automotive ADAS and other safety critical applications
  • Automotive Infotainment Systems
  • High-Voltage DC-DC Converters
  • Industrial

Description

The MAX20404/MAX20405/MAX20406 ICs are tiny synchronous buck converters with integrated high-side and low-side switches. The ICs are designed to deliver up to 6A with wide input voltages range from 3V to 36V. Voltage quality can be monitored by observing the PGOOD signal. The MAX20404/MAX20405/MAX20406 can operate in dropout by running at 99% duty cycle making it ideal for automotive and industrial applications.

The MAX20404/MAX20405/MAX20406 offers programmable or fixed output voltages of 5V and 3.3V. Frequency is internally fixed at 2.1MHz (or 400KHz or 3MHz) which allows for small external components, reduced output ripple, and guarantees no AM interference. MAX20404/5/6 automatically enters skip mode at light loads with ultra-low quiescent current of 10µA at no load. This family of products (including MAX20408/10) offers a pin-to-pin compatible offering from 4A to 10A in a single-phase configuration, and up to 20A in a dual-phase configuration. This device has also been optimized for dual-phase operation with very high current sharing accuracy. The devices can be ordered with spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the modulation frequency.

The MAX20404/MAX20405/MAX20406 is available in a small 3.5mm x 3.75mm 17-pin FC2QFN package and uses very few external components.

Simplified Block Diagram

MAX20404, MAX20405, MAX20406: Simplified Block Diagram MAX20404, MAX20405, MAX20406: 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 .