- NB675L
NB675L
NOT RECOMMENDED FOR NEW DESIGNS
High-Efficiency, Fast-Transient, 10A, 24V, Fully-Integrated COT Sync Buck with +/-1A LDO and Buffered Reference, Low Iq Version
NB675L continues to be in production for existing customers. Please consider this alternative for new designs:
NB685A
NB685A
Wide Vin 4.5-26V, 12A, Low Iq, High Current Synchronous Buck Converter with +/-1A LDO and Buffered Reference
Features & Benefits
- 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 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 Reset via EN or Power Cycle
- QFN 3mm x 3mm Package
… and many more!
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Description
The NB675L is the lower quiescent current version of NB675. It provides a complete power supply for DDR3, DDR3L and LPDDR2 memory with the highest power density. It integrates a high frequency synchronous rectified step-down switch mode converter (VDDQ) with a 1.0A sink/source LDO (VTT) and buffered low noise reference (VTTREF).
NB675L is able to deliver 10A continuous output current and 12A peak output current over a wide input supply range with excellent load and line regulation. The Buck converter employs the Constant-On-Time (COT) control scheme, which provides fast transient response and eases loop stabilization.
The VTT LDO provides 1.0A sink/source current capability and requires only 10uF ceramic capacitance.
The VTTREF tracks VDDQ/2 with an excellent 1% accuracy.
Under voltage lockout is internally set as 4.6V. An open drain power good signal indicates VDDQ is within its nominal voltage range.
Full protection features include OCP, OVP, and thermal shut down.
This part requires minimum number of external components and is available in QFN21 (3mmx4mm) package.
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Features & Benefits
- Wide 4.7V to 24V Operating Input Range
- 10A Continuous Output Current
- 12A Peak Output Current
- Built-in +/- 1.0A VTTLDO
- 105μA Quiescent Current
- Low RDS(ON) Internal Power MOSFETs
- Proprietary Switching Loss Reduction Technique
- Internal Soft Start
- Output Discharge
- 500kHZ Switching Frequency for NB675L
- OCP, OVP, UVP Protection and Thermal Shutdown
- VDDQ Adjustable from 0.6V to 5.5V
Active Part Numbers:
NB675LGL-P NB675LGL-Z
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
NB675L Resources
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