MP9943GQ Synchronous Buck Converter IC - QFN-8 Package

MP9943GQSynchronous Step Down Converter IC is a high-efficiency synchronous step-down (buck) DC-DC converter designed to deliver up to 3A peak output current with excellent line and load regulation. It operates from a wide 4V to 36V input voltage range and integrates low RDS(ON) power MOSFETs, making it ideal for industrial equipment, distributed power systems, automotive electronics, and embedded applications. The device features synchronous rectification, programmable output voltage from 0.8V, Power Good indication, internal soft-start, and comprehensive protection functions for reliable operation.MP9943GQ Synchronous Step Down Converter IC DatasheetFeatures:Wide 4V to 36V Input Voltage Range3A Peak Output CurrentHigh-Efficiency Synchronous Buck ConverterIntegrated 85mΩ / 55mΩ Power MOSFETs410kHz Fixed Switching FrequencyExternal Clock Synchronization (200kHz to 2.2MHz)Adjustable Output Voltage from 0.8VCurrent Mode ControlInternal Power Save Mode (PFM)Integrated Soft-StartPower Good (PG) OutputOver Current Protection with Hiccup ModeThermal Shutdown ProtectionHigh Duty Cycle OperationExcellent Line and Load RegulationQFN-8 (3mm × 3mm) PackageRoHS CompliantSpecifications:ParameterValueProduct TypeSynchronous Buck Converter ICPart NumberMP9943GQ-ZPackageQFN-8 (3mm × 3mm)Input Voltage4V ~ 36VMaximum Input Voltage40VOutput VoltageAdjustable from 0.8VPeak Output Current3ASwitching Frequency410kHz (Typ.)Sync Frequency200kHz ~ 2.2MHzHigh-Side MOSFET85mΩ (Typ.)Low-Side MOSFET55mΩ (Typ.)Feedback Voltage0.792V (Typ.)Quiescent Current0.7mA (Typ.)Shutdown Current8µA (Max.)Soft-Start Time1.5ms (Typ.)Current Limit4.4A (Typ.)Power Good OutputYesProtection FeaturesOCP, Thermal Shutdown, UVLOOperating Temperature-40°C to +125°CMounting TypeSurface MountRoHS ComplianceYes Pin Configuration:PinNameDescription1FBFeedback Input2VCCBias Supply3EN/SYNCEnable / Clock Synchronization4BSTBootstrap Supply5GNDGround6SWSwitching Output7INInput Supply8PGPower Good Output Also Check These Out:AN7112 Audio Power Amplifier ICTDA2822M Amplifier ICHT12D (RF Decoder) ICPackage Includes:1 x MP9943GQ Synchronous Step Down Converter IC - QFN-8 Package

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