Monolithic Power Systems Inc. MPL-SE2512-220

Overview

MPL-SE2512-220 from Monolithic Power Systems is a semi-shielded power inductor with 22 µH nominal inductance (±20%), 885 mΩ typical DCR, 0.70 A rated current (ΔT = 40 K), and 0.80 A saturation current at both 25°C and 100°C ambient - designed for DC-DC converter output filtering in space-constrained portable electronics.

For engineers reviewing the MPL-SE2512-220 datasheet, MPL-SE2512-220 thermal derating curve, MPL-SE2512-220 land pattern, or MPL-SE2512-220 alternative inductors for low-profile DC-DC applications, this part delivers verified performance in battery-powered wearables, IoT edge nodes, and compact power modules where stray field suppression and +125°C operation are critical.

Technical Context

This 22 µH inductor operates within -40°C to +125°C ambient (including self-heating), uses semi-shielded construction to limit magnetic coupling and EMI in dense layouts, and maintains inductance stability up to 0.80 A before 30% L-drop at elevated temperature. Its 2.5 mm × 2.0 mm × 1.2 mm footprint supports high-density PCB integration.

Electrical characterization is performed at 100 kHz / 100 mA for inductance, with R_DC measured at 25°C and current ratings validated on a standardized single-layer test board (35 µm Cu, 30 × 50 mm). Resonance frequency is 14 MHz, indicating suitability for buck converters switching up to ~2 MHz.

Key Specifications

Pinout & Package

As a passive two-terminal inductor, MPL-SE2512-220 has no active pins or signal assignments. It features a surface-mount, semi-shielded molded package with bottom-side terminations compatible with standard reflow profiles. Dimensions: 2.5 mm (L) × 2.0 mm (W) × 1.2 mm (H); land pattern per MPS Rev. 1.2 specification (ref. A=2.40 mm, B=0.80 mm, C=2.90 mm).

Key Features

Applications

Availability

MPL-SE2512-220 is available at Aetrix Electronics and suitable for wearable power supplies, IoT sensor nodes, and portable medical monitors requiring stable component supply, consistent thermal performance, and RoHS-compliant packaging.

Supply support for MPL-SE2512-220 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 operations.

The MPL-SE series targets miniaturized DC-DC power stages in battery-powered systems, emphasizing low profile, thermal resilience, and EMI control - directly addressing layout and reliability challenges in next-generation wearables and edge IoT.

FAQ

What is the maximum allowable PCB temperature rise when operating at rated current?

The rated current of 0.70 A is defined as the DC current causing a 40 K temperature rise above ambient on a standardized single-layer test board (35 µm Cu, 30 × 50 mm). Actual rise depends on copper area, layer count, airflow, and proximity to heat sources - design validation under real layout conditions is required.

Does MPL-SE2512-220 have a polarity marking or directional orientation?

No. MPL-SE2512-220 is a non-polarized, two-terminal inductor with symmetric construction. Terminal 1 and Terminal 2 are electrically interchangeable; orientation on PCB does not affect electrical performance or thermal behavior.

Can this inductor be used in a 2 MHz switching converter?

Yes - its 14 MHz self-resonant frequency provides >7× margin over 2 MHz operation, ensuring inductive behavior dominates impedance. However, core losses increase with frequency; verify temperature rise and efficiency at 2 MHz using actual application waveforms and layout.

How does the semi-shielded structure compare to fully shielded alternatives?

Semi-shielded construction reduces stray field by ~60–70% versus unshielded types while maintaining lower cost and slightly better thermal dissipation than fully shielded (molded or metal-can) inductors. It is optimized for EMI-sensitive but thermally constrained applications like wearables.

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

Yes - MPL-SE2512-220 ships in EIA-481-compliant tape-and-reel packaging. Standard reel quantity is 3,000 units per 13-inch reel, with carrier tape width of 8 mm and pocket depth matching the 1.2 mm component height.

What is the recommended solder paste and reflow profile?

MPS specifies compatibility with standard lead-free (SAC305) solder pastes and IPC/JEDEC J-STD-020D-compliant reflow profiles. Peak temperature must not exceed 260°C for ≤30 seconds; preheat ramp rate should be ≤3°C/s to avoid thermal shock to the molded body.