MPQ4320C Datasheet | Monolithic Power Systems

DESCRIPTION The MPQ4320C is a configurable-frequency (350k Hz to 2.5MHz) synchronous, step-down switching converter with integrated internal highside and low-side power MOSFETs (HS-FET and LS-FET, respectively). The device provides up to 0.5A 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 acmodates a variety of step-down applications in automotive input environments. A 1μA shutdown current (ISD) allows the device to be used in batterypowered applications. An open-drain power good (PG) signal indicates whether the output is within 94.5% to 105.5% of its nominal voltage. Frequency foldback helps prevent inductor current (IL) runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation. High duty cycle and low-dropout (LDO) mode are provided for automotive cold-crank conditions. The MPQ4320C is available in a QFN-12 (2mmx3mm) package with wettable flanks or a QFN-12 (3mmx4mm) package with wettable flanks, and is AEC-Q100 qualified. FEATURES - Designed for Automotive Applications: o Survives 42V Load Dump o Supports 3.1V Cold Crank o Up to 0.5A of Continuous Output Current (IOUT) o Continuous Operation Up to 36V o -40°C to +150°C Junction Temperature (TJ) Range FEATURES (continued) - Increases Battery Life: o 1μA Shutdown Supply Current (ISD) - High Performance for Improved Thermals: o Integrated 70mΩ High-Side and 50mΩ Low-Side MOSFETs (HS-FET and LSFET, Respectively) o 65ns Minimum On Time (t ON_MIN) o 50ns Minimum Off Time (t OFF_MIN) - Optimized for EMC/EMI: o Frequency Spread Spectrum (FSS) Modulation o Symmetric VIN Pinout o CISPR25 Class 5 pliant o 350k Hz to 2.5MHz Configurable Switching Frequency (f SW) o Mesh Connect™ Flip-Chip Package - Additional Features : o Power Good (PG) Output o Forced Continuous Conduction Mode (FCCM) o Low-Dropout (LDO) Mode o Fixed Output Options (1): 1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V o Hiccup Over-Current...