Topology | Buck Converter |
Input voltage | 19 V |
Switching frequency | 500-700 kHz |
Output 1 | 1.35 V / 12 A |
IC revision | 1.1 |
The NB685 provides a complete power supplyfor DDR3, DDR3L, LPDDR3, and DDR4memory with the highest power density. Itintegrates a high frequency synchronousrectified step-down switch mode converter(VDDQ) with a 1A sink/source LDO (VTT) andbuffered low noise reference (VTTREF).Adaptive Constant-On-Time (COT) controlmode provides fast transient response andeases loop stabilization. The DC auto tune loopprovides good load and line regulation.The VTT LDO provides 1A sink/source currentcapability and requires only 10uF ceramiccapacitance. The VTTREF tracks VDDQ/2 withan excellent 1% accuracy.Full protection features include OC Limit, OVP,UVP and thermal shut down and Overtemperature warning (OTW).The converter requires minimum number ofexternal components and is available in QFN 3x3packages.
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples | |
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![]() | 744311068 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 0.68 | 20.9 | 9.5 | 20 | 3.1 | 105 | Superflux |
Samples |
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Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples |
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