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Product Detailed Parameters
- Description：IC REG DL BUCK/LINEAR SYNC 12QFN
- Series：-
- Mfr：Monolithic Power Systems Inc.
- Package：Tape & Reel (TR)
- Topology：Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs：2
- Frequency - Switching：700kHz
- Voltage/Current - Output 1：5.1V, 8A
- Voltage/Current - Output 2：5V, 100mA
- Voltage/Current - Output 3：-
- w/LED Driver：No
- w/Supervisor：No
- w/Sequencer：No
- Voltage - Supply：5.5V ~ 24V
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：12-PowerVFQFN
- Supplier Device Package：12-QFN (2x3)
- Grade：-
- Qualification：-
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Overview
The NB679AGD-P is a synchronous step-down DC-DC converter manufactured by Monolithic Power Systems. It operates with an input voltage range of 5.5 V to 26 V and provides a fixed output voltage of 5.1 V at up to 8 A output current. The device integrates internal power switches and functions at a switching frequency of 700 kHz. It features a shutdown control pin and draws 100 uA of quiescent current. The component is housed in a QFN-12 surface-mount package.
Feature Summary
- Synchronous buck topology for high efficiency
- Fixed 5.1 V output configuration
- Integrated shutdown functionality
Applications
- Point-of-load regulation for embedded systems
- Power supply stages for industrial equipment
- Voltage conversion for communication infrastructure
Procurement Notes
Verify the specific suffix 'P' against official Monolithic Power Systems documentation to confirm packaging type and availability status. Cross-reference the part number with authorized distributors to ensure authenticity, as supply constraints may affect procurement channels. Confirm RoHS compliance details directly from the manufacturer datasheet before integration.
Selection Notes
Select this component when a fixed 5.1 V output is required from a 5.5 V to 26 V input rail. The 8 A current capability suits moderate power applications. Ensure the design accommodates the 700 kHz switching frequency for inductor selection. Verify thermal requirements for the QFN-12 package under maximum load conditions.
Part Context
This part belongs to the NB679 series of synchronous buck converters from Monolithic Power Systems. It shares architectural similarities with other members like the NB679GD-P but differs in its fixed output voltage specification. The series targets efficient power management solutions requiring compact footprints and high current density.
Replacement Considerations
The NB679GD-P offers identical electrical specifications except for a 5 V fixed output. Evaluate board compatibility and circuit adjustments if substituting between these variants. No other direct substitutes are confirmed in public documentation.
