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Product Detailed Parameters
- Description：IC SW SPST-NOX64 24OHM 144BGA
- Series：-
- Mfr：Monolithic Power Systems Inc.
- Package：Tray
- Switch Circuit：SPST - NO
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：24Ohm
- Channel-to-Channel Matching (ΔRon)：1.2Ohm
- Voltage - Supply, Single (V+)：4.5V ~ 5.5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：2µs, 2µs
- -3db Bandwidth：-
- Charge Injection：18pC
- Channel Capacitance (CS(off), CD(off))：10pF
- Current - Leakage (IS(off)) (Max)：-
- Crosstalk：-60dB @ 5MHz
- Operating Temperature：-25°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：144-TFBGA
- Supplier Device Package：144-BGA (10x10)
- Number of Circuits：64
- Grade：-
- Qualification：-
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Overview
The MP4865AGBD-T is a synchronous step-down DC/DC converter manufactured by Monolithic Power Systems. It integrates high-side and low-side N-channel MOSFETs to deliver up to 3A of output current from an input voltage range of 2.7V to 16V. The device supports adjustable switching frequencies between 300kHz and 2.2MHz, allowing for optimization of external component size and transient response. Key electrical parameters include a maximum output voltage of 5V, a quiescent current of 90µA, and thermal shutdown protection. It operates within a junction temperature range of -40°C to 125°C and is housed in a compact 6x6mm QFN-28 package.
Feature Summary
- Integrated synchronous rectification with internal power switches
- Programmable switching frequency for design flexibility
- Constant on-time control architecture for fast transient response
- Comprehensive protection features including over-current and thermal shutdown
Applications
- Point-of-load regulation for industrial equipment
- Power supply stages for embedded computing systems
- Battery-powered portable devices requiring efficient voltage conversion
Procurement Notes
Verify the complete part number against official manufacturer documentation to ensure correct suffixes for packaging and temperature grade. Confirm RoHS compliance status through the specific datasheet revision. Cross-reference the supplier's component listing with the original manufacturer's catalog to validate authenticity and avoid counterfeit risks during acquisition.
Selection Notes
Evaluate the required output current against the 3A limit under expected ambient temperatures. Select the switching frequency based on available inductor size constraints and efficiency targets. Ensure the input voltage range covers the minimum source voltage including ripple. Verify that the load transient requirements align with the constant on-time control characteristics of this topology.
Part Context
This component belongs to the MP4865 family of synchronous buck converters designed for medium-current applications. It shares architectural similarities with other MPS step-down regulators but is distinguished by its specific pinout, integrated MOSFET ratings, and control loop compensation. The QFN-28 package facilitates thermal dissipation for dense PCB layouts.
Replacement Considerations
Direct substitutes may include other MPS synchronous buck converters with similar current ratings and input voltage ranges. Verify pin-to-pin compatibility and control loop stability when replacing with alternative models from different manufacturers.
