MPQ4571 High-Efficiency, 1A, 60V, Fully Integrated, Synchronous Buck Converter, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ4571 is a fully integrated, fixed- Wide 4.5V to 60V Operating Input Range frequency, synchronous step-down converter. It 1A Continuous Output Current can achieve up to 1A of continuous output High-Efficiency Synchronous Mode Control current with peak current control for excellent 250m/45m Internal Power MOSFETs transient response. Configurable Frequency Up to 2.2MHz 180 Out-of-Phase SYNC Out Clock The wide 4.5V to 60V input voltage range 40A Quiescent Current accommodates a variety of step down applications in an automotive input environment. Low Shutdown Mode Current: 2A The devices 2A shutdown mode quiescent FB-Tolerance: 1% at Room Temp, 2% at current makes it ideal in battery-powered Full Temp applications. Selectable AAM or Forced CCM Operation at Light Load The MPQ4571 integrates internal high-side and Internal 0.45ms Soft Start low-side power MOSFETs for high efficiency Remote EN Control without an external Schottky diode It employs Power Good Indicator advanced asynchronous modulation (AAM) to Low-Dropout Mode achieve high efficiency during light-load conditions by scaling down the frequency to Over-Current Protection (OCP) reduce switching and gate driver losses. Short-Circuit Protection with Hiccup Mode V Under-Voltage Lockout (UVLO) IN Standard features include built-in soft start, Thermal Shutdown enable control, and power good indication. Available in a QFN-12 (2.5mmx3mm) High-duty cycle and low-dropout mode are Package provided for automotive cold crank conditions. Available in a Wettable Flank Package The chip provides over-current protection (OCP) Available in AEC-Q100 Grade-1 with valley current detection to avoid current runaway. It also has hiccup short-circuit protection APPLICATIONS (SCP), input under-voltage lockout (UVLO), and Automotive Infotainment auto-recovery thermal protection. Automotive Lamps and LEDs With internal compensation, the MPQ4571 offers Automotive Motor Control a very compact solution with a minimal number of Industrial Power Systems readily available, standard external components. All MPS parts are lead-free, halogen-free, and adhere to the RoHS It is available in a QFN-12 (2.5mmx3mm) directive. For MPS green status, please visit the MPS website under package. Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ4571 Rev. 1.0 www.MonolithicPower.com 1 1/21/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. MPQ4571 60V, 1A, SYNCHRONOUS STEP-DOWN CONVERTER, AEC-Q100 TYPICAL APPLICATION Efficiency vs. Load Current V = 5V, L = 15H, f = 400kHz, AAM OUT SW 4.5V to 60V IN BST VIN 100 1.60 VIN=8V VIN=12V VIN=24V 90 1.40 VIN=36V GND GND SW VOUT Vin=48V VIN=60V 80 1.20 MPQ4571 VCC FREQ 70 1.00 GND 60 0.80 EN EN FB 50 0.60 40 0.40 CCM/SYNCO PG PG 30 0.20 20 0.00 1 10 100 1000 LOAD CURRENT (mA) MPQ4571 Rev. 1.0 www.MonolithicPower.com 2 1/21/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. EFFICIENCY (%) POWER LOSS (W)