Click here to ask an associate for production status of specific part numbers. MAX20404/MAX20405/ Automotive 36V, 4A/5A/6A Fully Integrated MAX20406 Synchronous Buck Converter General Description Benefits and Features The MAX20404/MAX20405/MAX20406 ICs are tiny syn- Multiple Functions for Small Size chronous buck converters with integrated high-side and Operating V Range of 3V to 36V IN low-side switches. The ICs are designed to deliver up to 10A Quiescent Current in Skip Mode 6A with wide input voltages range from 3V to 36V. Volt- Synchronous DC-DC Converter with Integrated age quality can be monitored by observing the PGOOD FETs signal. The MAX20404/MAX20405/MAX20406 can oper- 400kHz, 2.1MHz, and 3MHz Fixed-Frequency ate in dropout by running at 99% duty cycle, making it ide- Options al for automotive and industrial applications. Fixed 2.5ms Internal Soft-Start Programmable 0.8V to 10V Output, or 3.3V and The MAX20404/MAX20405/MAX20406 offers program- 5.0V Fixed-Output Options Available mable or fixed output voltages of 5V and 3.3V. Frequency 3.5mm x 3.75mm 17-Pin FC2QFN is internally fixed at 2.1MHz (or 400KHz or 3MHz) which Symmetrical Package Offers Superior EMI allows for small external components, reduced output rip- Performance ple, and guarantees no AM interference. The MAX20404/ MAX20405/MAX20406 automatically enters skip mode at Dual-Phase Capability light loads with ultra-low quiescent current of 10A at Can Be Used in Dual-Phase Configuration for High- no load. This family of products (including MAX20408/ Power Design MAX20410) offers a pin-to-pin compatible offering from Dynamic Current Sharing via Shared VEA Pin 4A to 10A in a single-phase configuration, and up to 20A Low-Iq Operation Capability in Dual Phase in a dual-phase configuration. This device has also been High Precision optimized for dual-phase operation with very high current 1% Output-Voltage Accuracy in FPWM Mode at sharing accuracy. The devices can be ordered with No Load spread-spectrum frequency modulation designed to min- Precise Output Voltage Monitoring with PGOOD imize EMI-radiated emissions due to the modulation fre- Robust for the Automotive Environment quency. Forced-PWM and Skip-Mode Operation The MAX20404/MAX20405/MAX20406 is available in a 99% Duty-Cycle Operation with Low Dropout small 3.5mm x 3.75mm 17-pin FC2QFN package and us- Overtemperature and Short-Circuit Protection es very few external components. -40C to +125C Operating Temperature Range 42V Load-Dump Tolerant Applications AEC-Q100 Qualified Automotive Infotainment systems ADAS and other safety critical applications Industrial High-Voltage DC-DC Converters Ordering Information appears at end of data sheet. 19-100996 Rev 5 11/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX20404/MAX20405/ Automotive 36V, 4A/5A/6A Fully Integrated MAX20406 Synchronous Buck Converter Simplified Block Diagram PGOOD VEA EN PGOOD MAX20404 THRESHOLD MAX20405 MAX20406 FB FEEDBACK LOGIC VOLTAGE SELECT EAMP BST INTERNAL BIAS SOFT START OUT SUP VREF PWM AVERAGE CURRENT PWM SENSE AND SLOPE COMP ILIM SYNCOUT THRESHOLD LX CLK OSCILLATOR STEP-DOWN CONVERTER BIAS GATE DRIVE LOGIC SPREAD SPECTRUM LX OPTION EXTERNAL CLOCK PGND FSYNC FSYNC ZX TIED HI (PWM MODE) ZX SELECT COMP TIED LO (SKIP MODE) LOGIC GND BIAS INTERNAL BIAS OUT SWITCHOVER LINEAR REGULATOR www.analog.com Analog Devices 2