NB686GQ-Z

The NB686 provides a complete power supply with the highest density for DDR3, DDR3L, LPDDR3, and DDR4 memory. It integrates a high-frequency, synchronous, rectified, step-down, switch-mode converter (VDDQ) with a 1 A sink/source LDO (VTT) and buffered low noise reference (VTTREF). The NB686 operates at high efficiency over a wide output current load range based on MPS proprietary switching loss reduction technology and internal low Ron power MOSFETs. Adaptive constant-on-time (COT) control mode provides fast transient response and eases loop stabilization. The DC auto-tune loop provides good load and line regulation. The VTT LDO provides 1 A sink/source current capability and requires only 22 µF ceramic capacitors. The VTTREF tracks VDDQ/2 with excellent 1% accuracy. Full protection features include OC limit, OVP, UVP, thermal shutdown, and over-temperature warning (OTW). The converter requires a minimum number of external components, and it is available in a QFN 3mm x 3mm package

Wide 4.5 V to 26 V Operating Input Range Compatible for IMVP8 135 µA Low Quiescent Current 8 A Continous Output Current 9A Peak Output Current Selectable Ultrasonic Mode Selectable 500 kHz/700 kHz Switching Frequency Built-In +/- 1 A VTTLDO 1% Buffered VTTREF Output Adaptive COT for Fast Transient DC Auto-Tune Loop Stable with POSCAP and Ceramic Output Capacitors Over-Temperature Warning Internal Soft Start Output Discharge OCL, OVP, UVP, and Thermal Shutdown Latch-Off Re-set via EN or Power Cycle QFN 3mm x 3mm Package