Monolithic Power Systems Inc. MPL-SE2512-R47

Overview

MPL-SE2512-R47 from Monolithic Power Systems is a semi-shielded power inductor with 0.47 µH nominal inductance, 20 mΩ typical DCR, 4.5 A rated current (ΔT = 40 K), and 6.5 A saturation current at both 25°C and 100°C ambient - designed for high-efficiency DC-DC buck converters in space-constrained portable power stages.

For engineers reviewing the MPL-SE2512-R47 datasheet, MPL-SE2512-R47 pinout (no pins - surface-mount passive), MPL-SE2512-R47 application in battery-powered DC-DC filtering, or MPL-SE2512-R47 equivalent inductor alternatives, this component delivers verified low-stray-field performance, RoHS/REACH-compliant halogen-free construction, and stable operation from –40°C to +125°C.

Technical Context

This 0.47 µH inductor is optimized for high-frequency switching regulators operating up to 122 MHz self-resonant frequency, with tight ±20% inductance tolerance measured at 100 kHz / 100 mA. Its semi-shielded ferrite-core construction suppresses magnetic flux leakage while enabling compact 2.5 mm × 2.0 mm × 1.2 mm footprint.

Thermal performance is characterized under standardized single-layer PCB conditions (35 µm Cu, 30 mm × 50 mm), where rated current induces 40 K temperature rise; saturation current reflects 30% inductance drop at both 25°C and 100°C ambient - indicating robust thermal derating stability across automotive and industrial operating ranges.

Key Specifications

Pinout & Package

Surface-mount passive device with no electrical pins; terminals are solderable bottom pads only. Package is a monolithic rectangular molded inductor in 2.5 mm × 2.0 mm × 1.2 mm (L × W × H) outline per MPS land pattern drawing Rev. 1.2.

Key Features

Applications

Availability

MPL-SE2512-R47 is available at Aetrix Electronics and suitable for battery-powered devices, IoT sensor nodes, and wearable electronics requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MPL-SE2512-R47 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs and passive components, headquartered in Kirkland, WA, with global design and support centers.

The MPL-SE series is engineered specifically for high-density, high-efficiency DC-DC power conversion in portable and battery-operated systems - emphasizing low profile, thermal resilience, and EMI control without sacrificing saturation margin.

FAQ

What is the recommended PCB layout for optimal thermal performance?

Mount the MPL-SE2512-R47 on a single-layer 35 µm copper PCB (30 mm × 50 mm minimum) with thermal relief pads connected to internal ground planes via ≥4 vias per pad. Avoid placing heat-generating components within 3 mm to maintain ΔT ≤ 40 K at 4.5 A.

Does the 6.5 A saturation current apply at 100°C ambient without derating?

Yes - the datasheet specifies ISAT 100°C = 6.5 A (typ), meaning inductance drops by 30% at that current when ambient is held at 100°C. This reflects validated thermal stability, not extrapolated data, and is measured per JEDEC JESD22-A104.

Can MPL-SE2512-R47 replace unshielded inductors in existing designs?

Yes, provided board layout accommodates identical 2.5 mm × 2.0 mm footprint and height clearance. Semi-shielding reduces stray field by ~60%, often eliminating need for additional EMI shielding cans or spacing adjustments in noise-sensitive applications.

Is tape-and-reel packaging available, and what is the standard reel size?

Yes - MPL-SE2512-R47 ships in EIA-481-compliant tape-and-reel packaging. Standard reel contains 3,000 units on 12 mm tape with 4 mm pocket depth, compatible with automated SMT placement equipment.

How does the ±20% inductance tolerance impact feedback loop stability?

The ±20% tolerance is centered at 0.47 µH and tightly correlated with DCR and saturation behavior. In typical buck converters using voltage-mode control, this variation introduces <±3% output voltage deviation - well within standard 5% regulation specs when compensated per MPS AN-114.

What is the maximum allowable reflow temperature profile?

MPL-SE2512-R47 is rated for lead-free reflow per IPC/JEDEC J-STD-020 Rev. E: peak temperature 260°C for ≤30 seconds, with ramp-up rate ≤3°C/s and ramp-down rate ≤6°C/s. Exceeding these limits risks epoxy cracking or interfacial delamination.