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Automotive 36V, 8A/10A Fully-Integrated
Buck Converter with 10μA Quiescent
Current and Dual-Phase Capability
MAX20408/MAX20410
General Description
Benefits and Features
The MAX20408/MAX20410 are automotive, highly-inte-
grated synchronous buck converters with internal high-
side and low-side switches. The ICs deliver up to 8A/10A
with input voltages from 3.0V to 36V. The voltage quality
can be monitored by the PGOOD signal. The MAX20408/
MAX20410 can operate in the dropout mode by running at
99% duty cycle, making them ideal for automotive and in-
dustrial applications.
● High-Power DC/DC Converter in Small Solution Size
• 3.0V to 36V Operating Input Voltage Range
• Integrated High-Side and Low-Side FETs
• 8A/10A Maximum Output Current
• 400kHz and 2.1MHz Fixed Frequency Options
• Fixed 2.5ms Soft-Start Time
• 34ns Minimum On-Time
• Programmable 0.8V to 10V Output with 400kHz,
0.8V to 6V Output with 2.1MHz, or Fixed Output
Options
The MAX20408/MAX20410 offer programmable or fixed
output voltage options. High switching frequency at
2.1MHz and 400kHz options allow for small external com-
ponents, reduced output ripple, and guarantee no AM
interference. SYNC input programmability enables three
modes for optimized performance: forced PWM mode,
skip mode with ultra-low quiescent current, and synchro-
nization to an external clock. The spread-spectrum option
minimizes EMI radiated emissions.
• ±1.8% Output Voltage Accuracy
• Symmetric and Balanced SUP and PGND Pinout
Placement for Superior EMI Performance
• Thermally-Enhanced 3.5mm x 3.75mm, 17-Pin
FC2QFN Package
● High Efficiency at All Load Ranges
• 10μA Quiescent Current in Skip Mode
• Up to 94.3% Efficiency at 12V /5V
/2.1MHz
/400kHz
IN
OUT
OUT
The MAX20408/MAX20410 also come with dual-phase
capability, allowing up to 20A designs. Two ICs can be
configured as a master and slave with dynamic current
sharing and 180º out-of-phase operation.
• Up to 95.6% Efficiency at 12V /5V
IN
● Dual-Phase Operation up to 20A Load Capability
• Frequency Synchronization Input/Output
• 180º Out-of-Phase Between Master and Slave
• Dynamic Current Sharing
The MAX20408/MAX20410 are available in a small
3.5mm x 3.75mm, 17-pin FC2QFN package. They are
pin-to-pin compatible with the MAX20404/MAX20405/
MAX20406 (4A to 6A) family of products.
● Robust for Automotive Environment
• Forced PWM and Skip-Mode Operation
• 99% Duty Cycle Operation with Low Dropout
Voltage
Applications
● Automotive Supplies
• Supports 42V Load Dump
• Spread-Spectrum Option
• Power Good Indicator
• Overtemperature and Short-Circuit Protection
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
• Infotainment Systems
• Advanced Driver-Assistance Systems (ADAS)
● Industrial Supplies
● General Purpose Buck Converters
● Scalable Power Solution
• Footprint Compatible with MAX20404/MAX20405/
MAX20406
19-101036; Rev 7; 1/23
Ordering Information appears at end of data sheet.
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