Monolithic Power Systems Inc. MPL-AT2512-2R2

Overview

MPL-AT2512-2R2 from Monolithic Power Systems is a low-profile molded power inductor with 2.2 µH nominal inductance (±20%), 68 mΩ typical DCR, 2.8 A rated current (ΔT = 40 K), and 3.4 A saturation current at both 25°C and 100°C ambient - designed for high-frequency DC-DC converters in space-constrained portable electronics.

For engineers reviewing the MPL-AT2512-2R2 datasheet, MPL-AT2512-2R2 pinout (two-terminal SMT device), MPL-AT2512-2R2 application in battery-powered SMPS, or MPL-AT2512-2R2 equivalent for compact 2.5×2.0×1.2 mm footprint, this page delivers verified electrical specs, thermal performance curves, land pattern guidance, and RoHS-compliant sourcing details.

Technical Context

This molded inductor uses soft-saturation ferrite core material to maintain stable inductance under DC bias up to 3.4 A while minimizing audible noise and thermal drift across –40°C to +125°C operating range. Its 38 MHz self-resonant frequency supports switching frequencies up to 2–3 MHz in buck/boost topologies.

The 2.5 mm × 2.0 mm × 1.2 mm LGA-style package features symmetric terminations optimized for automated reflow soldering on single-layer 35 µm Cu PCBs. DCR tolerance is controlled to ±15% of typ value, and inductance is measured at 100 kHz / 100 mA per IEC 62044-2.

Key Specifications

Pinout & Package

As a two-terminal surface-mount inductor, MPL-AT2512-2R2 has no active pins or signal roles; it functions as a passive energy-storage element with symmetric metallized terminations on opposite long edges of the molded rectangular body.

Key Features

Applications

Availability

MPL-AT2512-2R2 is available at Aetrix Electronics and suitable for battery-powered devices, high-switching-frequency SMPS, and IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MPL-AT2512-2R2 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-efficiency, small-footprint power management ICs and passive components for portable, industrial, and automotive applications.

This part belongs to the MPL-AT series of molded power inductors - engineered specifically for ultra-thin DC-DC converters in wearables and battery-constrained IoT endpoints where height, thermal stability, and EMI control are critical.

FAQ

What is the recommended PCB layout for MPL-AT2512-2R2?

Use the manufacturer-recommended land pattern: 2.30 mm × 0.50 mm pads with 0.90 mm center-to-center spacing and 0.3 mm solder mask opening. Maintain ≥0.3 mm clearance to adjacent copper and avoid thermal reliefs on terminations to ensure uniform reflow and mechanical strength.

Does MPL-AT2512-2R2 support AEC-Q200 qualification?

No - MPL-AT2512-2R2 is not AEC-Q200 qualified. It is rated for industrial temperature range (–40°C to +125°C) and intended for consumer, medical, and commercial portable applications, not automotive under-hood environments.

How does saturation current change with ambient temperature?

ISAT remains constant at 3.4 A from 25°C to 100°C ambient - confirmed by test data showing identical 30% inductance drop points across both temperatures, indicating minimal core permeability drift in this range.

Can MPL-AT2512-2R2 replace wirewound inductors in existing designs?

Yes - its 2.2 µH value, 2.8 A IR rating, and 2.5×2.0 mm footprint match common 0805 wirewounds. However, verify thermal performance: molded construction offers lower DCR but reduced heat dissipation vs. open-frame wirewound types.

Is the dot marking electrically significant?

Yes - the dot identifies the start of winding and establishes polarity. In multi-phase or differential filter layouts, consistent dot orientation ensures additive magnetic coupling and reduces common-mode noise.

What is the shelf life and moisture sensitivity level (MSL)?

MPL-AT2512-2R2 is packaged in dry tape-and-reel (MSL 1, unlimited floor life) with storage spec of –10°C to +40°C and <50% RH - no baking required prior to reflow.

How does DCR tolerance affect power loss calculation?

With RDC max = 82 mΩ, worst-case conduction loss at 2.8 A is 643 mW - 34% higher than typ (190 mW). Designers should use max DCR for thermal margin analysis and derate output current if board-level cooling is limited.