MPQ4321 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4321 Synchronous Step-Down Converters feature a 3.3V to 36V input range with 42V load dump tolerance and 1A continuous output current. These converters are frequency-configurable (350kHz to 2.5MHz) with integrated internal high-side and low-side power MOSFETs. The MPQ4321 step-down converters offer 1μA shutdown mode quiescent current that allows the device to be used in battery-powered applications. These step-down converters achieve high power conversion efficiency by scaling down the switching frequency (fSW) under light-load conditions to reduce the switching and gate-driving losses. The MPQ4321 step-down converters provide high-duty cycles and low-dropout modes for automotive cold-crank conditions. Typical applications include automotive infotainment, Advanced Driver Assistance Systems (ADAS), industrial power systems, and automotive clusters.

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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
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
Qualification
Series
Packaging
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact
Datasheet
440In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact,Low Quiescent Current, SynchronousStep-Down Converter, AEC-Q100 Qualified
Datasheet
362In Stock
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C AEC-Q100 MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact
Datasheet
500Expected 04/08/2027
Min.: 1
Mult.: 1
: 500

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C AEC-Q100 MPQ4321 Reel, Cut Tape
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C MPQ4321 Reel
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact,Low Quiescent Current, SynchronousStep-Down Converter, AEC-Q100 Qualified
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C AEC-Q100 MPQ4321 Reel
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra Compact
Datasheet
Non-Stocked Lead-Time 71 Weeks
Min.: 5,000
Mult.: 5,000
: 5,000

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA, 25 uA 415 kHz, 1 MHz, 2.2 MHz - 40 C + 150 C AEC-Q100 MPQ4321 Reel