MPQ4321C Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4321C Synchronous Step-Down Converters are integrated with internal high-side and low-side power MOSFETs. These converters feature a 3.3V to 36V input range with a 42V load dump tolerance and up to 1A continuous output current. The MPQ4321C step-down converters offer 350kHz to 2.5MHz configurable frequency range, and 1μA shutdown current (ISD) that allows the converter to be used in battery-powered applications. The MPQ4321C step-down converters support frequency foldback that prevents inductor current (IL) runaway during start-up.

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Qty. RoHS ECAD Model Mounting Style
Package/Case
Topology
Output Voltage
Output Current
Number of Outputs
Quiescent Current
Switching Frequency
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A,Ultra-Compact, SynchronousStep-Down Converter
Datasheet
475In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A,Ultra-Compact, SynchronousStep-Down Converter
Datasheet
189In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators Load Dump Tolerant, 1A
Datasheet
500In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators Load Dump Tolerant, 1A
Datasheet
500In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-14 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A,Ultra-Compact, SynchronousStep-Down Converter
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A,Ultra-Compact, SynchronousStep-Down Converter
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel
Monolithic Power Systems (MPS) Switching Voltage Regulators Load Dump Tolerant, 1A
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel
Monolithic Power Systems (MPS) Switching Voltage Regulators Load Dump Tolerant, 1A
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-14 Buck 5 V 1 A 1 Output 1.2 mA 350 kHz to 2.5 MHz - 40 C + 150 C MPQ4321 Reel