MPQ4436/4436A 45V, 6A, Low I Q, Synchronous Step-Down Converter, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ4436/4436A is a frequency Wide 3.3V to 45V Operating Voltage Range programmable, synchronous, step-down 6A Continuous Output Current switching regulator with integrated internal high- 1.7A Low Shutdown Supply Current side and low-side power MOSFETs. It provides 18A Sleep Mode Quiescent Current 6A (or less) of highly efficient output, with current Internal 48m High-Side and 20m Low- mode control for fast loop response. Side MOSFET 350kHz to 1000kHz Programmable The wide 3.3V to 45V input range Switching Frequency for Car Battery accommodates a variety of step-down Applications applications in an automotive input environment. A 1.7A shutdown mode quiescent current Synchronize to External Clock allows the part to be used in battery-powered Multi-Phase Capability applications. Out-of-Phase Synchronized Clock Output Frequency Spread Spectrum (FSS) Option High power conversion efficiency over a wide for Low EMI load range is achieved by scaling down the MPQ4436: Non-FSS version switching frequency in light-load conditions to MPQ4436A: FSS version reduce the switching and gate driving losses. Symmetric V for Low EMI IN An open-drain power good signal indicates that Power Good Output the output is within 93% to 106% of its nominal External Soft Start voltage. 100ns Minimum On Time Frequency foldback helps prevent inductor Selectable Advanced Asynchronous Mode (AAM) or Forced Continuous Conduction current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant Mode (FCCM) operation. Low Dropout Mode Hiccup Over-Current Protection High-duty cycle and low dropout mode are Available in a QFN-20 (4mmx4mm) provided for the automotive cold crank condition. Package The MPQ4436/4436A is available in a QFN-20 Available in a Wettable Flank Package (4mmx4mm) package. Available in AEC-Q100 Grade-1 APPLICATIONS Automotive Infotainment Automotive Clusters Advanced Driver Assistance Systems Industrial Power Systems All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ4436/4436A Rev. 1.2 MonolithicPower.com 1 11/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. MPQ4436/4436A 45V, 6A, LOW I , SYNCHRONOUS STEP-DOWN CONVERTER Q TYPICAL APPLICATION VIN 3.3 to 45V Efficiency vs. Load Current VIN EN VOUT=3.3V, FSW=470kHz, L=3.3H, AAM BST MODE 100 SYNCO VOUT SW 90 MPQ4436/ 80 4436A FREQ 70 PG FB 60 VCC SS 50 40 ICS VIN=12V 30 VIN=24V SYNCIN GND 20 VIN=36V 10 VIN=45V 0 0.1 1 10 100 1000 6000 LOAD CURRENT (mA) MPQ4436/4436A Rev. 1.2 MonolithicPower.com 2 11/8/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. EFFICIENCY (%)