Order- MP4323
MP4323
42V Load Dump Tolerant, 3A, Ultra-Compact, Low Quiescent Current, Synchronous Step-Down Converter
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Description
The MP4323 is a configurable-frequency (350kHz to 2.5MHz), synchronous, step-down switch-mode converter with integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The device can achieve up to 3A 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 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. A high duty cycle and low-dropout (LDO) mode are provided for automotive cold-crank conditions.
High power conversion efficiency across a wide load range is achieved by scaling down the switching frequency (fSW) under light-load conditions to reduce the switching and gate driver losses.
An open-drain power good (PG) signal indicates whether the output voltage (VOUT) is within 94.5% to 105.5% of its nominal voltage. Frequency foldback helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.
The MP4323 is available in a QFN-12 (2mmx3mm) package.
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Features & Benefits
- Designed for Automotive Applications:
- 42V Load Dump Tolerance
- Supports 3.1V Cold Crank
- 3A Continuous Output Current (IOUT)
- Wide 3V to 36V Operating Input Voltage (VIN) Range
- -40°C to +125°C Operating Junction Temperature (TJ) Range
- Increases Battery Life:
- 1μA Shutdown Current (ISD)
- 20μA Sleep Mode Quiescent Current (IQ)
- Advanced Asynchronous Modulation (AAM) Mode for Increased Efficiency under Light-Load Conditions
- High Performance for Improved Thermals:
- Integrated 70mΩ HS-FET and 50mΩ LS-FET
- 65ns Minimum On Time (tON_MIN)
- 50ns Minimum Off Time (tOFF_MIN)
- Optimized for EMC/EMI Reduction:
- Frequency Spread Spectrum (FSS) Modulation
- Symmetric VIN Pins (Pin 2 and Pin 10)
- CISPR25 Class 5 Compliant
- 350kHz to 2.5MHz Configurable Switching Frequency (fSW)
- MeshConnect™ Flip-Chip Package
- Additional Features:
- Power Good (PG) Output
- Low-Dropout (LDO) Mode
- Over-Current Protection (OCP) with Hiccup Mode
- Available in a QFN-12 (2mmx3mm) Package
- Available in a Wettable Flank Package
Active Part Numbers:
MP4323GDE-Z MP4323GDE-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MP4323 Resources
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PRODUCT CATEGORY
VIN (MAX) 30V TO 48VPRODUCT CATEGORY -
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