MP4321 Configurable-Frequency Step-Down Converters

Monolithic Power Systems (MPS) MP4321 Configurable-Frequency Step-Down Converters are configurable-frequency (350kHz to 2.5MHz), synchronous devices with integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The MP4321 achieves up to 1A of highly efficient output current (IOUT) with peak current control mode. The wide 3.3V to 36V input voltage (VIN) range and 42V load dump tolerance of the converters allow a variety of step-down applications in automotive input environments. A 1μA shutdown current (ISD) enables the devices to be used in battery-powered applications.

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Description Datasheet Availability Pricing (IDR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
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Output Current
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Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra-Compact
Datasheet
200In Stock
5.000Expected 17/04/2026
Min.: 1
Mult.: 1
Reel: 5.000

SMD/SMT QFN-12 Buck 800 mV to 32.4 V 1 A 1 Output 20 uA 2.2 MHz - 40 C + 125 C MP4321 Reel, Cut Tape
Monolithic Power Systems (MPS) MP4321GDE-P
Monolithic Power Systems (MPS) Switching Voltage Regulators 42V Load Dump Tolerant, 1A, Ultra-Compact
Datasheet
238In Stock
Min.: 1
Mult.: 1
Reel: 500

SMD/SMT QFN-12 Buck 800 mV to 34.2 V 1 A 1 Output 20 uA 350 kHz to 2.5 MHz - 40 C + 125 C MP4321 Reel, Cut Tape