Click here to ask about the production status of specific part numbers. MAX20408/MAX20410 Automotive 36V, 8A/10A Fully-Integrated Buck Converter with 10A Quiescent Current and Dual-Phase Capability General Description Benefits and Features The MAX20408/MAX20410 are automotive, highly-inte- High-Power DC/DC Converter in Small Solution Size grated synchronous buck converters with internal high- 3.0V to 36V Operating Input Voltage Range side and low-side switches. The ICs are designed to deliv- Integrated High-Side and Low-Side FETs er up to 8A/10A with input voltages from 3.0V to 36V. The 8A/10A Maximum Output Current voltage quality can be monitored by the PGOOD signal. 400kHz and 2.1MHz Fixed Frequency Options The MAX20408/MAX20410 can operate in the dropout Fixed 2.5ms Soft-Start Time mode by running at 99% duty cycle, making them ideal for 34ns Minimum On Time automotive and industrial applications. Programmable 0.8V to 10V Output with 400kHz, 0.8V to 6V Output with 2.1MHz, or Fixed Output The MAX20408/MAX20410 offer programmable or fixed Options output voltage options. High switching frequency at 1.8% Output Voltage Accuracy 2.1MHz and 400kHz options allow for small external com- Symmetric and Balanced SUP and PGND Pinout ponents, reduced output ripple, and guarantee no AM Placement for Superior EMI Performance interference. SYNC input programmability enables three Thermally-Enhanced 3.5mm x 3.75mm, 17-Pin modes for optimized performance: forced PWM mode, FC2QFN Package skip mode with ultra-low quiescent current, and synchro- nization to an external clock. The spread spectrum option High Efficiency at All Load Range minimizes EMI radiated emissions. 10A Quiescent Current in Skip Mode Up to 94.3% Efficiency at 12V /5V /2.1MHz IN OUT The MAX20408/MAX20410 also come with dual-phase Up to 95.6% Efficiency at 12V /5V /400kHz IN OUT capability allowing up to 20A designs. Two ICs can be configured as a master and a slave with dynamic current Dual-Phase Operation up to 20A Load Capability sharing and 180 out-of-phase operation. Frequency Synchronization Input/Output 180 Out-of-Phase Between Master and Slave The MAX20408/MAX20410 are available in a small Dynamic Current Sharing 3.5mm x 3.75mm, 17-pin FC2QFN package. They are pin to pin compatible with the MAX20404/MAX20405/ Robust for Automotive Environment MAX20406 (4 to 6A) family of products. Forced PWM and Skip-Mode Operation 99% Duty Cycle Operation with Low Dropout Voltage Applications Supports 42V Load Dump Automotive Supplies Spread-Spectrum Option Infotainment Systems Power Good Indicator Advanced Driver-Assistance Systems (ADAS) Overtemperature and Short-Circuit Protection Industrial Supplies -40C to +125C Automotive Temperature Range General Purpose Buck Converters AEC-Q100 Qualified Scalable Power Solution Footprint Compatible with MAX20404/MAX20405/ MAX20406 Ordering Information appears at end of data sheet. 19-101036 Rev 3 9/21MAX20408/MAX20410 Automotive 36V, 8A/10A Fully-Integrated Buck Converter with 10A Quiescent Current and Dual- Phase Capability Simplified Block Diagram PGOOD VEA EN PGOOD THRESHOLD MAX20408 MAX20410 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 BIAS INTERNAL OUT SWITCHOVER LINEAR REGULATOR www.maximintegrated.com Maxim Integrated 2