MAX20402/MAX20403
General Description
Automotive 36V, 2.5A/3.5A, Fully
Integrated Synchronous Silent
Switcher Buck Converters
Benefits and Features
The MAX20402/MAX20403 ICs are tiny, low-EMI
®
•
Silent Switcher
emission, synchronous Silent Switcher
buck
• Enables Compact, Efficient, Low-EMI Solution
• Spread-Spectrum Frequency Modulation
• Symmetrical Package Offers Superior EMI
Performance
converters with integrated high-side and low-side
switches. The MAX20402/MAX20403 deliver up to
2.5A/3.5A over a wide 3V to 36V input voltage range.
Voltage quality can be monitored by observing the
PGOOD signal. These ICs can operate in dropout by
running at 99% duty cycle, making them ideal for
automotive and industrial applications.
• CISPR 25 Class 5-Compliant EV Kit
•
Multiple Functions for Small Size
• Operating Input Voltage Range: 3V to 36V
• Synchronous DC-DC Converter with Integrated
FETs up to 2.5A/3.5A
The
MAX20402/MAX20403
offer
externally
programmable or internally fixed output voltages of 5V
and 3.3V. Fixed internal frequency options of
3MHz/2.1MHz/400kHz are available, which allow for
small external components and reduced output ripple,
and also guarantee no AM interference.
• 10μA Quiescent Current in Skip Mode
• 3MHz/2.1MHz/400kHz Switching Frequency
• Spread-Spectrum Option
• Fixed 2.5ms Internal Soft-Start
• Programmable 0.8V to 12V Output Voltage
Range or Fixed 5V/3.3V Options Available
• 99% Duty Cycle Operation with Low Dropout
When SYNC is low, the MAX20402/MAX20403
automatically enter skip mode at light loads with an ultra-
low quiescent current of 10μA at no load. A pin-
selectable, forced-PWM mode is also available, which
helps improve EMI performance. The devices have a
spread-spectrum frequency modulation option designed
to minimize EMI-radiated emissions due to the
modulation frequency.
•
•
High Precision for Safety Critical Applications
• ±1.5% Output Voltage Accuracy in FPWM
• Precision Enable Thresholds for Fully
Programmable UVLO Thresholds
• Accurate Windowed PGOOD
Robust for the Automotive Environment
• Average Current-Mode, Forced-PWM, and Skip
Operation
• Overtemperature, Overvoltage, and Short-Circuit
Protection
The MAX20402/MAX20403 are available in a small,
3mm x 3mm FC2QFN package and use very few
external components.
• 3mm x 3mm FC2QFN
• -40°C to +125°C Operating Temperature Range
• 42V Load-Dump Tolerant
Applications
•
Automotive Applications
• ADAS Systems
• Radar Modules
• Infotainment
• AEC-Q100 Qualified
Silent Switcher is a registered trademark of Analog Devices,
Inc.
•
•
Industrial Applications
High-Voltage DC-DC Converters
Ordering Information appears at end of data sheet.
19-101442; Rev 10; 9/23
© 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.