Order- MP4322
MP4322
36V, 2A, Configurable-Frequency, Low-IQ, Synchronous Step-Down Converter with 42V Load Dump Tolerance
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Description
The MP4322 is a configurable-frequency (350kHz to 2.5MHz), synchronous, step-down switching converter with integrated, internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The device provides up to 2A of highly efficient output current (IOUT) with peak current mode control.
The wide 3.3V to 36V input voltage (VIN) range and 42V load dump tolerance accommodate a variety of step-down applications in automotive input environments. A 1μA shutdown current (ISD) allows the device to be used in battery-powered applications.
High power conversion efficiency across the entire load range is achieved by scaling down the switching frequency (fSW) under light-load conditions to reduce switching and gate driver losses.
An open-drain power good (PG) signal indicates whether the output is within 94.5% to 105.5% of its nominal voltage. Frequency foldback prevents inductor current (IL) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. A high duty cycle and low-dropout (LDO) mode are provided for automotive cold-crank conditions.
The MP4322 is available in a QFN-12 (2mmx3mm) package with wettable flanks.
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Features & Benefits
- Designed for Aftermarket Automotive Applications:
- 42V Load Dump Tolerance
- Supports 3.1V for Cold Crank Conditions
- Up to 2A of Continuous Output Current (IOUT)
- Continuous Operation Up to 36V
- -40°C to +125°C Junction Temperature (TJ) Range
- Increases Battery Life:
- 1μA Shutdown Supply Current (ISD)
- 20μA Sleep Mode Quiescent Current (IQ)
- Advanced Asynchronous Modulation (AAM) Mode Increases Efficiency under Light Loads
- High Performance for Improved Thermals:
- Integrated 70mΩ/50mΩ MOSFETs
- 65ns Minimum On Time (tON_MIN)
- 50ns Minimum Off Time (tOFF_MIN)
- Optimized for EMC/EMI:
- Frequency Spread Spectrum (FSS) Modulation
- Symmetric VIN Pinout
- CISPR25 Class 5 Compliant
- 350kHz to 2.5MHz Configurable Switching Frequency (fSW)
- MeshConnectTM Flip-Chip Package
- Additional Features:
- Power Good (PG) Output
- Low-Dropout (LDO) Mode
- Fixed Output Options: 1V, 1.8V, 2.5V, 3.0V, 3.3V, 3.8V, or 5V
- Over-Current Protection (OCP) with Hiccup Mode
- Available in a QFN-12 (2mmx3mm) Package
- Available in a Wettable Flank Package
Active Part Numbers:
MP4322GDE-Z MP4322GDE-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MP4322 Resources
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