MP5520GQJ

MPL Optimized Performance with MPS Inductor The MP5520 is a high-efficiency, monolithic converter designed for power management in enterprise and datacenter solid-state drives (SSDs). The device integrates dual input current-limit switches (e-fuses), a bidirectional buck-boost converter, and a bidirectional power-sharing converter. The low on resistance (RDS(ON)) e-fuses are designed for an input voltage (VIN) up to 16V and 6V, respectively. Both e-fuses provide input current limiting and can block reverse currents. Soft start (SS) prevents inrush current during system start-up. The bidirectional buck-boost converter provides energy management. Backup energy is stored in high-voltage capacitors. MPS’s patented energy storage and release management control circuit minimizes the storage capacitor (CSTRG) requirement. The converter pumps VIN to a higher storage voltage (VSTRG), and if there is a VIN outage, the converter releases the energy to the system across a hold-up time. The configurable charging current ramps up VSTRG in a controlled manner. Paired with the e-fuses’ reverse-current blocking, the backup energy is fully utilized to support the load during VIN loss. Constant-on-time (COT) control is used when the bidirectional converter releases the energy from CSTRG, which minimizes the voltage drop during the transition from charge mode to backup mode. The total solution size is minimized since this converter only requires one inductor. The bidirectional power-sharing converter provides power sharing between the e-fuses. It can be configured to either boost power-sharing mode or buck power-sharing mode. The internal ADC accurately monitors VINx, the input current (IINx), and input power (PINx). To guarantee long-term reliability, the MP5520 offers CSTRG health monitoring. The MP5520 requires a minimal number of readily available, standard external components, and is available in a QFN-37 (5mmx6mm) package.