MPQ4313 45V, 3A, Low I Synchronous Step-Down Q Converter with Frequency Spread Spectrum, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ4313 is a frequency-programmable, Wide 3.3V to 45V Operating Range synchronous, step-down switching regulator with 3A Continuous Output Current integrated internal high-side and low-side power 1.7A Low Shutdown Supply Current MOSFET. It provides up to 3A of highly efficient 18A Sleep Mode Quiescent Current output, with current mode control for fast loop Internal 48m High-Side and 20m Low- response. Side MOSFETs 350kHz to 530kHz Programmable Switching The wide 3.3V to 45V input voltage range Frequency for Car Battery Applications accommodates a variety of step-down Switching Frequency Can Be Synchronized applications in an automotive input environment. to External Clock A 1.7A shutdown mode quiescent current allows the part to be used in battery-powered Out-of-Phase Synchronized Clock Output applications. High power conversion efficiency 3.3V, 5V Fixed Output Options over a wide load range is achieved by scaling Frequency Spread Spectrum (FSS) for Low down the switching frequency in light-load EMI conditions to reduce the switching and gate Symmetric V for Low EMI IN driver losses. Power Good Output External Soft Start An open-drain power good signal indicates 100ns Minimum On Time whether the output is within 95% to 105% of its Selectable Advanced Asynchronous Mode nominal voltage. (AAM) or Forced Continuous Conduction Frequency foldback helps prevent inductor Mode (FCCM) current runaway during start-up. Thermal Low-Dropout Mode shutdown provides reliable, fault-tolerant Hiccup Over-Current Protection operation. High-duty cycle and low-dropout Available in a QFN-20 (4mmx4mm) mode are provided for automotive cold crank Package conditions. Available in a Wettable Flank Package The MPQ4313 is available in a QFN-20 Available in AEC-Q100 Grade 1 (4mmx4mm) package. APPLICATIONS MPQ4313 FAMILY VERSIONS Automotive Infotainment Part Output Package Options Automotive Clusters Number Current Advanced Driver Assistance Systems MPQ4312 2A Industrial Power Systems MPQ4313 3A MPQ4314 4A QFN-20 (4mmx4mm) All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. (1) MPQ4315 5A WF For MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are MPQ4316 6A trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ4317 7A Note: 1) WF means wettable flank. MPQ4313 Rev. 1.0 www.MonolithicPower.com 1 6/5/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. MPQ4313 45V, 3A, LOW I , SYNCHRONOUS STEP-DOWN CONVERTER WITH FSS Q TYPICAL APPLICATION VIN Efficiency vs. Load Current 3.3V to V = 3.3V, f = 470kHz, L = 5.6H, OUT SW 45V AAM EN VIN 100 BST MODE SYNCO VOUT SW 80 MPQ4313 FREQ 60 PG FB 40 VCC SS VIN=12V NC VIN=24V SYNCIN 20 GND VIN=36V VIN=45V 0 10 100 1000 3000 Adjustable Output Version LOAD CURRENT (mA) VIN 3.3V to 45V EN VIN BST MODE SYNCO VOUT SW MPQ4313 FREQ PG FB VCC SS NC SYNCIN GND Fixed Output Version MPQ4313 Rev. 1.0 www.MonolithicPower.com 2 6/5/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. EFFICIENCY (%)