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Home > Products > Inductors, Coils, Chokes > Fixed Inductors

Monolithic Power Systems Inc. MPL-AT2514-2R2

Name: MPL-AT2514-2R2
Brand: Monolithic Power Systems Inc.
SKU: MPL-AT2514-2R2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPL-AT2514-2R2

Manufacturer:: Monolithic Power Systems Inc.

Category:: Fixed Inductors

Package:: 2-SMD, J-Lead

Datasheet:: MPL-AT2514-2R2.pdf

Description:: FIXED IND 2.2UH 2.6A 70 MOHM SMD

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPL-AT2514-2R2 from Monolithic Power Systems is a low-profile molded power inductor with 2.2 µH nominal inductance (±20%), 70 mΩ typical DCR, 2.6 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-AT2514-2R2 datasheet, MPL-AT2514-2R2 pinout (SMD terminals), MPL-AT2514-2R2 application in compact SMPS, or MPL-AT2514-2R2 equivalent for end-of-life mitigation, this page delivers verified electrical specs, thermal behavior context, package dimensions, and direct replacement guidance per MPS official documentation.

Technical Context

This molded SMD inductor uses composite magnetic material with soft saturation characteristics, enabling stable inductance down to 70% of nominal value under peak DC bias - critical for maintaining regulation margin in buck converters operating above 1 MHz. Its 2.5 mm × 2.0 mm × 1.4 mm footprint supports ultra-thin PCB layouts without compromising thermal derating up to +125°C total operating temperature.

Designed for input filtering and energy storage in battery-powered DC-DC stages, it exhibits low audible noise due to constrained core vibration and low AC resistance (typ. 45 MHz self-resonant frequency), with R_DC tolerance tightly controlled to ±14 mΩ (70–84 mΩ) to ensure consistent efficiency across production lots.

Key Specifications

Parameter	Value and Actual Design Meaning
Inductance	2.2 µH ±20% @ 100 kHz, 100 mA - ensures stable loop response in 500 kHz–2 MHz buck regulators
R_DC typ	70 mΩ - limits conduction loss to ≤470 mW at 2.6 A, supporting >92% efficiency in 3.3 V output designs
Rated Current	2.6 A (ΔT = 40 K on 35 µm Cu, 30×50 mm PCB) - defines continuous thermal limit under standard layout conditions
Saturation Current	3.4 A @ 25°C & 100°C (L drop = 30%) - enables peak-current-mode control headroom in transient-heavy loads
Operating Temp	−40°C to +125°C (including self-heating) - validated for wearable and IoT edge nodes with no derating below 100°C
SRF	45 MHz typ - places resonance well above switching frequencies, avoiding impedance anomalies in 2 MHz designs

Pinout & Package

Two-terminal surface-mount device in molded rectangular package; no polarity marking required. Dimensions: 2.5 mm (L) × 2.0 mm (W) × 1.4 mm (H); land pattern per MPS Rev. 1.1 drawing - pad length 2.0 mm, width 1.2 mm, spacing 0.8 mm center-to-center.

Pin/Terminal	Circuit Role	Design Meaning
Terminal 1	Input/Source node	Connects to switch node (high-side FET drain) in buck topology; carries full AC+DC current
Terminal 2	Output/Load node	Connects to output capacitor and load; same current magnitude, 180° phase shift relative to Terminal 1

Key Features

Feature	Design Value
Low profile (1.4 mm height)	Enables <1.6 mm Z-height PCB stacks in wearables and hearing aids without thermal stack-up penalties
Soft saturation curve	Gradual L reduction preserves control-loop stability during load transients - avoids sudden collapse in current-mode controllers
Molded composite construction	Eliminates air gaps and winding movement, reducing audible coil whine and mechanical microphonics
RoHS/REACH, halogen-free	Complies with IPC-1752A Tier 1 reporting requirements for medical and consumer OEMs targeting EU/US markets

Applications

Wearable Power Management

IoT Sensor Node DC-DC

Use Scenario: Ultra-thin smartwatch PMIC supplying 1.2 V core rail to ARM Cortex-M4 MCU and BLE radio.

IC Role / Device Role / Timing Role: Output filter inductor in 2 MHz synchronous buck converter; stores energy during high-side FET ON time and releases it during OFF time.

Use Value: 1.4 mm height fits within 1.6 mm chassis clearance; 3.4 A ISAT handles 2.2 A peak burst current from sensor fusion algorithms.

Use Scenario: Battery-powered environmental sensor node using Li-SOCl₂ cell (3.6 V) powering 3.3 V RF transceiver and 1.8 V ADC.

IC Role / Device Role / Timing Role: Input filter inductor for 1.5 MHz buck-boost regulator; suppresses high-frequency switching noise before entering analog section.

Use Value: 70 mΩ R_DC minimizes no-load quiescent loss; −40°C to +125°C rating covers outdoor deployment extremes.

Portable Medical Monitor

Wireless Earbud Charging Circuit

Use Scenario: ECG front-end module requiring clean 2.5 V analog supply derived from 3.7 V Li-ion cell.

IC Role / Device Role / Timing Role: Energy storage element in low-noise 1.2 MHz buck converter; filters ripple to meet <10 µV_pp analog rail spec.

Use Value: Molded construction eliminates audible noise during patient monitoring; soft saturation prevents gain compression in feedback loop.

Use Scenario: Compact charging case delivering 5 V USB-PD to earbuds via integrated buck converter.

IC Role / Device Role / Timing Role: Output choke in 2.2 MHz fixed-frequency buck stage stepping 12 V down to 5 V at 1.5 A.

Use Value: 2.5 mm × 2.0 mm footprint matches tight board area budget; 45 MHz SRF avoids interaction with 2.2 MHz fundamental and harmonics.

Equivalent & Alternatives

The following parts are listed as comparable options for similar power inductor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPL-AT2512-2R2	Same inductance (2.2 µH), lower profile (1.2 mm H), 65 mΩ R_DC, 2.8 A IR, 3.6 A ISAT - smaller footprint (2.5×2.0×1.2 mm)	Better suited for sub-1.3 mm Z-height designs; slightly higher saturation margin but reduced thermal mass	Select when board height is constrained below 1.35 mm and thermal load is moderate
MPX1D0620-2R2	2.2 µH, 1.0 mm height, 110 mΩ R_DC, 2.0 A IR, 2.5 A ISAT - shielded drum-core, higher DCR, lower saturation	Preferred where EMI shielding is mandatory and efficiency >90% is not required	Choose only if magnetic shielding is prioritized over efficiency and thermal performance

Compared with MPL-AT2514-2R2, MPL-AT2512-2R2 offers tighter height and improved saturation margin in identical footprint width/length, while MPX1D0620-2R2 trades efficiency and thermal capability for EMI containment - making the AT2512 the recommended direct replacement per MPS end-of-life notice.

Availability

MPL-AT2514-2R2 is available at Aetrix Electronics and suitable for wearable power management, IoT sensor node DC-DC conversion, and portable medical monitor supply rails requiring stable component supply despite its end-of-life status.

Supply support for MPL-AT2514-2R2 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 passive components for battery-powered and energy-efficient systems.

The MPL-AT series is engineered specifically for high-frequency, low-profile DC-DC converter applications in portable and wearable electronics - emphasizing thermal robustness, acoustic quietness, and layout flexibility in sub-2 mm height constraints.

FAQ

Is MPL-AT2514-2R2 still in active production?

No. MPS has declared MPL-AT2514-2R2 end-of-life and recommends migration to MPL-AT2512-2R2, which shares identical inductance, tighter height (1.2 mm), and improved thermal metrics. Last-time-buy dates and remaining stock levels are tracked by Aetrix Electronics for legacy design support.

What is the maximum allowable PCB copper thickness for rated current testing?

The rated current (2.6 A) is specified using 35 µm (1 oz) copper on a single-layer 30 mm × 50 mm test board. Thicker copper (e.g., 70 µm) improves heat spreading and may allow >3.0 A continuous operation, but requires validation per actual layout - MPS does not publish derating curves for alternate copper weights.

Does MPL-AT2514-2R2 have polarity or orientation sensitivity?

No. It is a non-polarized two-terminal inductor with symmetric construction. The dot marking indicates start of winding but has no functional impact on circuit operation or thermal performance - placement orientation does not affect inductance, saturation, or DCR.

Can MPL-AT2514-2R2 be used in automotive applications?

Not qualified per AEC-Q200. While its −40°C to +125°C operating range overlaps automotive ambient requirements, it lacks automotive-grade screening (e.g., vibration, thermal cycling, HTOL). For automotive use, MPS recommends the AEC-Q200-qualified MPL-AT2512-A series with equivalent inductance values.

How does soft saturation benefit control-loop stability?

Soft saturation causes gradual inductance decline (to 70% of nominal) under increasing DC bias, preventing abrupt changes in current slew rate and voltage gain. This maintains predictable loop dynamics in peak-current-mode controllers - unlike hard-saturating inductors that induce subharmonic oscillation or cycle skipping near ISAT.

What is the recommended reflow profile for MPL-AT2514-2R2?

MPS specifies JEDEC J-STD-020D-compliant lead-free reflow: peak temperature 260°C for ≤10 seconds, ramp-up ≤3°C/s, ramp-down ≤6°C/s, and time above 217°C of 60–150 seconds. Exceeding these limits risks epoxy cracking or interfacial delamination in the molded body.

MPL-AT2514-2R2 Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MPL-AT

Package/Case:: 2-SMD, J-Lead

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Type:: Molded

Material - Core:: -

Inductance:: 2.2 µH

Tolerance:: -

Current Rating (Amps):: 2.6 A

Current - Saturation (Isat):: 3.4A

Shielding:: Unshielded

DC Resistance (DCR):: 70mOhm

Q @ Freq:: -

Frequency - Self Resonant:: -

Ratings:: -

Operating Temperature:: -40°C ~ 125°C

Inductance Frequency - Test:: 100 kHz

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: -

Size / Dimension:: 0.098" L x 0.079" W (2.50mm x 2.00mm)

Height - Seated (Max):: 0.055" (1.40mm)

MPL-AT2514-2R2 FAQ

1.How can I place an order for MPL-AT2514-2R2 through Aetrix?

Please submit a Request for Quotation (RFQ) for MPL-AT2514-2R2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MPL-AT2514-2R2 reliable?

The price and inventory of MPL-AT2514-2R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPL-AT2514-2R2 is usually 5 days.

3.What payment methods are accepted for MPL-AT2514-2R2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPL-AT2514-2R2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPL-AT2514-2R2?

MPL-AT2514-2R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPL-AT2514-2R2 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MPL-AT2514-2R2?

For technical support, including MPL-AT2514-2R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPL-AT2514-2R2 requirements.

6.How does Aetrix verify that MPL-AT2514-2R2 is sourced from the original manufacturer or authorized distributors?

All MPL-AT2514-2R2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPL-AT2514-2R2 meets industry standards.

7.What is the process for return or replacement of MPL-AT2514-2R2?

All MPL-AT2514-2R2 units undergo pre-shipment inspection (PSI). If there is an issue with MPL-AT2514-2R2, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MPL-AT2514-2R2 part is unused and in its original packaging.

Return procedure for MPL-AT2514-2R2:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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