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Monolithic Power Systems NB685A | Demoboard EVNB685A-Q-00A
26 V, 12 A, Low Iq, High Current Synchronous Buck Converter with +/- 1 A LDO and Buffered Reference
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-26 V |
| Output 1 | 1.35 V / 12 A |
| IC revision | 1.0 |
Description
The NB685A provides a complete power supply for DDR3, DDR3L, LPDDR3, and DDR4 memory with the highest power density. It integrates a high frequency synchronous rectified step-down switch mode converter (VDDQ) with a 1A sink/source LDO (VTT) and buffered low noise reference (VTTREF). 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.
Features
- Wide 4.5 V to 26 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 SwitchingFrequency
- Built-in +/- 1 A VTTLDO
- 1% Buffered VTTREF Output
- Adaptive COT for Fast Transient
- DC Auto-Tune Loop
- Stable with POSCAP and Ceramic OutputCapacitors
- Over-Temperature Warning
- Internal Soft Start
- Output Discharge
- OCL, OVP, UVP, and Thermal Shutdown
- Latch-Off Reset via EN or Power Cycle
- QFN 3mm x 3mm Package
Typical applications
- Networking Systems
- Distributed Power Systems
- Laptop Computers
- Servers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Operation Force (Value) (g) | Schematic | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744311068 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 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 | – | – | – | ||
 | 450301014042 | SPEC | – | 5 files | Active i| Production is active. Expected lifetime: >10 years. | WS-SLTV THT Mini Slide Switch, Opposite Side Connection 10x2.5 mm | – | – | – | – | – | – | – | 800 | SPDT | Bulk |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744311068 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 450301014042 | SPEC | – |
| 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 | Operation Force (Value) (g) | Schematic | Packaging | Samples |
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