Monolithic Power Systems NB685A
The NB685A provides a complete power supply with the highest power 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 NB685A 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.| Part No. | NB685A |
|---|---|
| Datasheet | NB685A Download |
| Manufacturer |  Monolithic Power Systems |
| Description | 28V 12A Synchronous Buck Converter |
| Buy | Stock & Price |
DESCRIPTION
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 a 22 μF ceramic capacitor. The VTTREF tracks VDDQ/2 with excellent 1% accuracy. Full protection features include OC limit, OVP, UVP, over-temperature warning (OTW), and thermal shutdown. The converter requires a minimum number of external components and is available in a QFN 3mm x 3mm package. TYPICAL APPLICATIONFEATURES
● Wide 4.5 V to 28 V Operating Input Range● Compatible for IMVP8
● 135 μA Low Quiescent Current
● 12 A Continous Output Current
● 13 A Peak Output Current
● Selectable Ultrasonic Mode
● Selectable 500 k/700 k 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
● In...
