Monolithic Power Systems Inc. MPL-AY1265-220

Overview

MPL-AY1265-220 from Monolithic Power Systems is a molded power inductor with 22 µH nominal inductance (±20%), 31.4 mΩ typical DCR, 7 A rated current (ΔT = 40 K), and 9 A saturation current at both 25°C and 100°C ambient - designed for high-current, high-frequency DC-DC converters in FPGA and POL applications.

For engineers reviewing the MPL-AY1265-220 datasheet, MPL-AY1265-220 pinout (two-terminal device), MPL-AY1265-220 application in high-current SMPS, or MPL-AY1265-220 equivalent for 22 µH molded inductors, this page delivers verified electrical specs, thermal behavior, PCB layout guidance, and real-world use context without generic assumptions.

Technical Context

This molded inductor uses composite powder core technology enabling soft saturation behavior and stable inductance over temperature (–40°C to +155°C). Its 5 MHz typical self-resonant frequency supports operation in high-frequency switching topologies up to ~2 MHz.

The 13.5 mm × 12.6 mm × 6.2 mm footprint integrates low audible noise and minimal EMI due to fully shielded construction and optimized winding geometry - critical for battery-powered and portable embedded systems where thermal and acoustic constraints are stringent.

Key Specifications

Pinout & Package

Two-terminal surface-mount molded inductor in shielded rectangular package measuring 13.5 mm × 12.6 mm × 6.2 mm. Land pattern per MPS-recommended footprint (A = 5.0 mm ref, B = 8.0 mm ref, C = 14.50 mm ref); polarity marked with dot indicating start of winding.

Key Features

Applications

Availability

MPL-AY1265-220 is available at Aetrix Electronics and suitable for battery-powered devices, portable electronics, and FPGA power delivery systems requiring stable component supply, high thermal margin, and low-profile molded inductors with repeatable saturation behavior.

Supply support for MPL-AY1265-220 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 passive components, headquartered in Kirkland, WA, with global design and support operations.

The MPL-AY series targets high-efficiency, high-density DC-DC conversion in space-constrained applications - engineered for low-loss, thermally resilient operation in next-generation embedded and portable power systems.

FAQ

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

The rated current of 7 A is defined as the DC current causing a 40 K temperature rise above ambient when mounted on a specified single-layer PCB (35 µm Cu, 30×50 mm). Actual rise depends on layout, copper area, airflow, and proximity to other heat sources - thermal simulation or empirical testing is recommended for final design validation.

Does MPL-AY1265-220 have polarity, and how is it marked?

Yes - polarity is indicated by a dot marking on the top surface denoting the start of winding. This enables consistent phase alignment in multi-phase or coupled-inductor configurations and helps minimize EMI in synchronized converter designs.

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

Yes - its 5 MHz typical self-resonant frequency ensures inductive impedance dominates up to at least 2 MHz. Measured impedance vs. frequency data confirms >20 Ω inductive reactance at 2 MHz, supporting stable operation in high-frequency buck converters without resonance-related instability.

How does the soft saturation characteristic affect transient response?

Soft saturation causes gradual inductance reduction above ISAT rather than abrupt collapse, allowing continued energy transfer during short-duration load transients. This maintains loop stability and reduces output voltage undershoot in FPGA and processor POL rails during sudden current demands.

Is MPL-AY1265-220 compliant with RoHS and REACH regulations?

Yes - it is RoHS/REACH-compliant and halogen-free, meeting EU Directive 2011/65/EU and Regulation (EC) No. 1907/2006. Full compliance documentation, including substance declarations and test reports, is available directly from Monolithic Power Systems upon request.

What is the recommended soldering profile for this molded inductor?

MPS specifies standard lead-free reflow per IPC-J-STD-020. Peak temperature must not exceed 260°C for ≤30 seconds. Preheat ramp rate ≤3°C/s; time above 217°C should be 60–150 seconds. Avoid thermal shock - do not subject to rapid cooling or water wash immediately after reflow.