Monolithic Power Systems (MPS) MP4320 Switching Voltage Regulators

Monolithic Power Systems (MPS) MP4320 Switching Voltage Regulators are 350kHz to 1.8MHz configurable-frequency, synchronous, step-down switching converters with integrated internal high-side and low-side power MOSFETs. These regulators operate at 3.3V to 36V input voltage (V_IN) range and 42V load dump tolerance that meet step-down applications in automotive input environments. The MP4320 regulators provide up to 0.5A of highly efficient output current (I_OUT) with peak current mode control. The open-drain Power Good (PG) signal indicates whether the output is within 94.5% to 105.5% of its nominal voltage. The MP4320 regulators are available in a QFN-12 2mm x 3mm package with wettable flanks. These regulators are ideal for USB chargers, aftermarket automotive applications, battery-powered systems, and general consumer applications.

Features

Designed for aftermarket automotive applications:
- Survives 42V load dump
- Supports 3.1V cold crank
- Up to 0.5A of continuous output current (I_OUT)
- Up to 36V continuous operation
- -40°C to 125°C Junction Temperature (T_J) range
Increases battery life:
- 1μA Shutdown Supply Current (I_SD)
- 20μA sleep mode Quiescent Current (I_Q)
- Advanced Asynchronous Modulation (AAM) mode increases efficiency under light loads
High performance for improved thermals:
- Integrated 70mΩ High-Side and 50mΩ Low-Side MOSFETs (HS-FET and LS-FET)
- 65ns minimum on time (t_{ON_MIN})
- 50ns minimum off time (t_{OFF_MIN})

Optimized for EMC/EMI:
- Frequency Spread Spectrum (FSS) modulation
- Symmetric V_IN pinout
- CISPR25 Class 5 compliant
- 350kHz to 1.8MHz configurable switching frequency (f_SW)
- MeshConnect™ flip-chip package
Additional features:
- Power Good (PG) output
- Low-Dropout (LDO) mode
- Fixed Output options are 1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, or 5V
- Hiccup Over-Current Protection (OCP)
- Available in a QFN-12 2mm x 3mm package
- Available in a wettable flank package