Monolithic Power Systems (MPS) MP4322 Step-Down Switching Converters are 350kHz to 2.5MHz configurable-frequency synchronous converters with integrated internal high-side and_low-side power MOSFETs. These converters offer up to 2A continuous output current with peak current mode control. The MP4322 converters operate in Advanced Asynchronous Modulation (AAM) mode and_optimize efficiency under no-load and_light-load conditions. These converters employ a 128-step triangular profile and_15kHz modulation frequency to spread the internal switching frequency across a 20%_(±10%) window.
The MP4322 converters feature 20μA sleep mode Quiescent current (IQ), 42V load dump tolerance, Power Good (PG) output, Hiccup Over-Current Protection (OCP), and_Low-Dropout (LDO) mode. These converters are CISPR25 Class 5 compliant and_are available in a QFN-12 (2mm x 3mm) package with wettable flanks. The MP4322 converters are used in USB chargers, general consumer, battery-powered systems, and_aftermarket automotive applications.
Features
- 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)
- MeshConnect™ flip-chip package
- Designed for aftermarket automotive applications:
- 42V load dump tolerance
- Supports 3.1V for cold crank conditions
- Up to 2A of continuous output current
- Up to 36V continuous operation
- -40°C to 125°C junction temperature (TJ) range
- Power Good (PG) output
- Low-Dropout (LDO) mode
- Hiccup Over-Current Protection (OCP)
- Available in a QFN-12 (2mm x 3mm) package
- Available in a wettable flank package
Applications
- USB chargers
- Battery-powered systems
- General consumer
