Monolithic Power Systems Inc. MPL-AT2512-R68

Overview

MPL-AT2512-R68 from Monolithic Power Systems is a low-profile molded power inductor with 0.68 µH nominal inductance (±20%), 23 mΩ typical DCR, 4.8 A rated current (ΔT = 40 K), 6 A saturation current at both 25°C and 100°C, and 85 MHz typical self-resonant frequency - designed for high-frequency DC-DC converters in space-constrained portable electronics.

For engineers reviewing the MPL-AT2512-R68 datasheet, MPL-AT2512-R68 package dimensions, MPL-AT2512-R68 temperature rise curve, or MPL-AT2512-R68 alternative inductors, this page delivers verified electrical specs, application-specific thermal behavior, soft saturation characteristics, and RoHS-compliant construction details critical for high-efficiency, low-noise SMPS design in wearable and IoT edge devices.

Technical Context

This molded SMD inductor uses composite magnetic material to achieve soft saturation-inductance drops gradually under DC bias, supporting stable regulation in buck converters operating above 1 MHz. Its 2.5 mm × 2.0 mm × 1.2 mm footprint enables dense PCB layouts without compromising thermal performance up to +125°C ambient.

The device exhibits low AC resistance (<1 Ω at 10 MHz) and high Q-factor peak near 20 MHz, confirming suitability for input filtering and output smoothing in high-switching-frequency power stages where EMI suppression and efficiency are co-optimized.

Key Specifications

Pinout & Package

As a passive two-terminal surface-mount inductor, MPL-AT2512-R68 has no active pins or signal assignments. It features a molded epoxy package with exposed copper terminations on opposite ends of a 2.5 mm × 2.0 mm footprint and maximum height of 1.2 mm. Recommended land pattern: 2.30 mm × 0.90 mm pads with 0.50 mm spacing (center-to-center).

Key Features

Applications

Availability

MPL-AT2512-R68 is available at Aetrix Electronics and suitable for wearable power management, IoT edge-node DC-DC conversion, and portable medical monitoring requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MPL-AT2512-R68 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 for power conversion, battery management, and motor control applications.

MPL-AT series inductors are engineered specifically for integration with MPS's portfolio of high-frequency DC-DC converters - emphasizing low profile, thermal robustness, and predictable saturation behavior in miniaturized power systems.

FAQ

What is the recommended PCB layout for optimal thermal performance?

Mount MPL-AT2512-R68 on a single-layer 30 mm × 50 mm PCB with 35 µm copper thickness and 2.30 mm × 0.90 mm solder pads spaced 0.50 mm center-to-center. Avoid placing heat-generating components within 2 mm; use thermal relief traces only if necessary - direct copper pour under the inductor improves heat dissipation by up to 15 K at 4.8 A.

How does the 30% inductance drop at saturation impact loop stability?

A 30% L drop at 6 A reflects gradual core saturation due to composite material properties - not abrupt collapse. This preserves phase margin in voltage-mode controllers and avoids subharmonic oscillation in current-mode topologies, unlike ferrite-core inductors that exhibit sharp saturation knees.

Can MPL-AT2512-R68 replace wirewound inductors in existing 1 MHz designs?

Yes - its 85 MHz SRF and flat impedance curve up to 20 MHz ensure inductive dominance through 3× switching frequency. Verify DCR match (23 mΩ typ) and thermal rise against original part; molded construction eliminates winding resonance issues common in wirewound types at >1.5 MHz.

Is the dot marking polarity-sensitive for circuit function?

No - the dot indicates start of winding but has no functional polarity in DC-DC applications. The inductor is electrically symmetric; orientation does not affect regulation, efficiency, or EMI. Dot placement aids visual inspection and automated optical alignment during placement.

What is the maximum allowable reflow peak temperature?

MPL-AT2512-R68 is qualified for standard lead-free reflow per IPC/JEDEC J-STD-020 Rev E: peak temperature ≤260°C for ≤30 seconds, with ramp rate ≤3°C/s pre-peak. Mold compound remains stable; no delamination or parameter shift observed after three reflow cycles.

Does the 40 K temperature rise include ambient contribution?

Yes - the 40 K ΔT is measured above ambient (25°C) under specified test conditions (single-layer PCB, 35 µm Cu, 30×50 mm). Total absolute temperature must not exceed +125°C, meaning maximum ambient + ΔT ≤125°C. At 85°C ambient, max allowed ΔT is 40 K - same limit applies.

Are tape-and-reel packaging quantities standardized?

Yes - MPL-AT2512-R68 ships in 7-inch reels containing 3,000 units per reel, conforming to EIA-481-D standards. Reel tension, pocket depth, and cover tape peel strength meet MPS specification MPL-AT2512-R68-TR-Rev1.2 for reliable pick-and-place at ≥15 cm/s feed speed.