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Monolithic Power Systems NB685 | Demoboard EVNB685-Q-01A
26V, Low IQ, High Current Synchronous Buck Converter With+/-1A and Bufferd Refference
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-26 V |
| Output 1 | 1.35 V / 12 A |
| IC revision | Rev.1.0 |
Description
The NB685 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). The NB685 operates at high efficiency over a wide output current load rang based on MPS proprietary switching loss reduction tech and internal low Ron power MOSFETs.
Features
Wide 4.5V to 26V Operating Input Range
- Compatible for IMVP8
- 135uA low quiescent Current
- 12A Continous Output Current
- Selectable Ultrasonic Mode
- Selectable 500k/700k Switching Frequency
- Built-in +/- 1A VTTLDO
- 1% Buffered VTTREF Output
- Adaptive COT for Fast transient
- DC Auto Tune Loop
- Stable with POSCAP and Ceramic OutputCap
- Over Temperature Warning
- Internal Soft Start
- Output Discharge
- OCL, OVP, UVP, OTP
- Latch off Reset via EN or Power Cycle
Typical applications
- Networking Systems and Server
- Distributed Power Systems
- Laptop Computer