Monolithic Power Systems Inc. MPL-SE2512-2R2

Overview

MPL-SE2512-2R2 from Monolithic Power Systems is a semi-shielded power inductor with 2.2 µH nominal inductance (±20%), 72 mΩ typical DCR, 2.5 A rated current (ΔT = 40 K on single-layer PCB), and operates from –40°C to +125°C ambient including self-heating. It serves as output filter and energy storage in compact DC-DC converters for portable electronics.

For engineers reviewing the MPL-SE2512-2R2 datasheet, MPL-SE2512-2R2 package dimensions, MPL-SE2512-2R2 thermal derating behavior, or MPL-SE2512-2R2 saturation current vs. temperature, this page delivers verified electrical specs, application context for battery-powered systems, and physical integration guidance for high-density PCB layouts.

Technical Context

This inductor uses a semi-shielded ferrite core construction with copper winding optimized for low stray magnetic field and stable inductance under DC bias. Its 2.2 µH value targets buck converter output filtering at switching frequencies up to 48 MHz resonance frequency.

Rated current (2.5 A) is defined by 40 K temperature rise on a standardized single-layer PCB (35 µm Cu, 30 × 50 mm); saturation current (2.7 A at both 25°C and 100°C) reflects 30% inductance drop threshold under worst-case thermal conditions.

Key Specifications

Pinout & Package

As a passive two-terminal surface-mount inductor, the MPL-SE2512-2R2 has no active pins or signal assignments. It features a monolithic semi-shielded structure in a 2.5 mm × 2.0 mm × 1.2 mm rectangular footprint (JEDEC MS-012 compatible), with solderable terminations on opposite long edges.

Key Features

Applications

Availability

MPL-SE2512-2R2 is available at Aetrix Electronics and suitable for battery-powered devices, wearable electronics, and portable medical sensors requiring stable component supply with consistent parametric performance across production lots.

Supply support for MPL-SE2512-2R2 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 magnetics, headquartered in Kirkland, WA, with global design and support centers.

The MPL-SE series is engineered for space-constrained, thermally sensitive applications-specifically targeting high-efficiency, low-EMI DC-DC conversion in portable and wearable electronics where size, thermal headroom, and magnetic isolation are critical.

FAQ

What is the maximum allowable board temperature rise when using MPL-SE2512-2R2 at 2.5 A?

The rated current of 2.5 A is defined as the DC current causing a 40 K temperature rise above ambient on a standardized single-layer PCB (35 µm Cu, 30 × 50 mm). Actual board temperature rise depends on copper area, layer count, airflow, and proximity to heat sources-designers must validate thermal performance in their specific layout.

How does saturation current change between 25°C and 100°C ambient for this inductor?

Both ISAT 25°C and ISAT 100°C are specified as 2.7 A typ-the inductor maintains identical saturation current rating across this full operating range, indicating minimal thermal degradation of core permeability under bias at elevated temperatures.

Is MPL-SE2512-2R2 suitable for automotive cabin applications?

No-while its operating temperature range (–40°C to +125°C) overlaps with some automotive zones, it is not AEC-Q200 qualified, lacks automotive-grade traceability, and is designed specifically for consumer portable/wearable use cases per MPS documentation.

Can this inductor replace MPL-SE2512-1R5 in an existing design?

Only with circuit re-optimization: increasing inductance from 1.5 µH to 2.2 µH raises impedance at a given frequency, reducing ripple current but slowing transient response. Peak-to-peak output ripple and load-step recovery must be re-evaluated; compensation network may require adjustment.

What PCB land pattern is recommended for reliable soldering?

MPS specifies a land pattern matching the 2.5 mm × 2.0 mm body with 0.5 mm pad length and 0.8 mm pad width (center-to-center spacing 2.0 mm). Use stencil aperture ratio ≥1.5 and reflow profile per J-STD-020; avoid oversized pads that cause tombstoning due to asymmetric wetting.

Does the semi-shielded construction eliminate need for keep-out zones around the inductor?

No-semi-shielding reduces but does not eliminate stray magnetic fields. Maintain ≥1 mm clearance from sensitive analog traces, crystal oscillators, or Hall-effect sensors; orient the inductor so its magnetic axis is perpendicular to adjacent signal lines to minimize coupling.