MPQ9842 Datasheet | Monolithic Power Systems

DESCRIPTION The MPQ9842 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very pact solution that achieves 2A of continuous output current with excellent load and line regulation over a wide 3.3V to 36V input supply range. The switching frequency is programmable or can be synchronized to an external clock in the range of 350k Hz to 2.5MHz. Synchronous operation and ultra-low 14μA sleep mode quiescent current provide high efficiency over the output current load range, allowing the MPQ9842 to be used in a variety of step-down applications in automotive input environments and battery-powered applications. Peak-current-mode operation provides fast transient response and eases loop stabilization. The excellent low dropout performance allows the MPQ9842 to be used in high duty cycle applications. Full protection features include over-current protection (OCP), short-circuit protection (SCP), and thermal shutdown. An open-drain power good (PG) signal indicates when the output is within 10% of its nominal voltage. The MPQ9842 is available in a space-saving QFN-16 (3mmx4mm) package. TYPICAL APPLICATION FEATURES - 2μA Low Shutdown Supply Current - 14μA No-Load Quiescent Current - Internal 125mΩ High-Side and 55mΩ Low- Side MOSFET - 350k Hz to 2.5MHz Programmable Switching Frequency - Power Good (PG) Output - External Soft Start (SS) - 80ns Minimum On Time - Selectable Forced CCM and AAM - Hiccup Over-Current Protection (OCP) - AEC-Q100 Grade-1 - Available in a QFN-16 (3mmx4mm) Package APPLICATIONS - Automotive Systems - Industrial Power Systems All MPS parts are lead-free, halogen-free, and adhere to the Ro HS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. VIN GND OFF ON SYNC BIAS PHASE FREQ SS PG VCC VOUT VIN GND OFF...