MP2249DN-LF-Z

MP2249DN-LF-Z is a Monolithic Power Systems synchronous buck DC-DC regulator. It integrates the control circuitry with high-side and low-side MOSFETs in a lead-free LF-Z package to efficiently convert a higher input voltage to a lower, regulated output.
Key points:
- Synchronous buck topology for high efficiency
- External feedback network for adjustable output
- Enable/shutdown input, soft-start, and protection features (overcurrent, overtemperature, UVLO)
- Suitable for compact power rails in CPUs/GPUs, SoCs, memory, FPGA, and telecom applications
- RoHS-compliant, lead-free packaging (LF-Z)
For exact electrical specs (input voltage range, max output current, switching frequency, efficiency, pinout), refer to the MP2249DN-LF-Z datasheet. If you’d like, I can summarize the key numbers from the datasheet.

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MP2249DN-LF-Z is a compact, high-efficiency, synchronous buck regulator. Key features:
- Integrated high-side and low-side MOSFETs (synchronous)
- Wide input voltage range
- Output voltage adjustable via external resistors
- Fixed-frequency, current-mode PWM for fast transient response
- Soft-start and enable input
- Protections: overcurrent, overvoltage, undervoltage lockout, thermal shutdown
- Suitable for low quiescent current and compact designs
- High efficiency with a small DFN-8 (LF-Z) package
- RoHS/lead-free compliant

- Pin count: 8 pins (DFN-8 package, lead-free variant)
- Function: High-efficiency switch-mode constant-current LED driver (buck LED driver with integrated switching transistor for driving LEDs from a higher input voltage).

- Manufacturer: Monolithic Power Systems, Inc. (MPS).
- Company type: A fabless semiconductor company that designs and markets high-performance analog/mixed-signal power-management ICs for consumer electronics, computing, and industrial applications (publicly traded on NASDAQ as MPWR).

MP2249DN-LF-Z is a high-efficiency, synchronous buck regulator. Typical applications include:
- CPU/GPU core voltage regulators in desktops and laptops
- Memory and chipset rails
- VRMs for graphics cards, FPGAs, and ASICs
- Motherboard PMICs
- Telecom, network, and industrial power supplies needing high-efficiency DC-DC conversion
(Lead-free package option: LF-Z.)

QFN-16 (4×4 mm) package with an exposed pad; lead-free (LF).