Monolithic Power Systems Inc. MID02W0303AGY-3R-P

Overview

MID02W0303AGY-3R-P from Monolithic Power Systems is a regulated, isolated 3.3V-output DC/DC converter for 3V–3.6V input systems, delivering up to 0.25W with ±0.2% load regulation, 3kVDC isolation, and operation from –40°C to +125°C. It integrates MOSFET, transformer, and feedback circuitry in a single SOICW-16 package and serves as bias supply for digital isolators and RS-485/CAN transceivers.

For engineers reviewing the MID02W0303AGY-3R-P datasheet, MID02W0303AGY-3R-P pinout, MID02W0303AGY-3R-P application, or MID02W0303AGY-3R-P equivalent, key selection criteria include its 3kVDC isolation rating, 0.25W regulated output, SOICW-16 thermal layout constraints, and compatibility with industrial sensor and telecom bias power designs requiring high reliability and CISPR32 Class B compliance.

Technical Context

This device implements an integrated flyback topology with internal primary-side switching and secondary-side feedback via transformer-coupled sensing-no optocoupler or external compensation required. Its regulation loop maintains 3.3V ±0.2% over 0–75mA load and ±0.1% over 3V–3.6V input variation.

Protection architecture includes non-latching UVLO (2.61V rising threshold), hiccup-mode short-circuit protection with ~150ms off-time, and thermal shutdown at 160°C with 20°C hysteresis. EMI suppression relies on internal soft-start (15ms), controlled ground partitioning (SGND1/PGND1 vs. SGND2/PGND2), and recommended CLC filtering with ferrite beads.

Key Specifications

Pinout & Package

Package: SOICW-16 (wide-body, 10.3mm × 7.5mm × 2.33mm), RoHS-compliant, MSL Level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated DC/DC converter applications.

Compared with RECOM R1SX-0505-R and ADUM6000ARWZ, the MID02W0303AGY-3R-P uniquely balances 3kVDC isolation, SOICW-16 compactness, and self-regulated 3.3V output-making it optimal for space-constrained industrial and telecom bias applications where input is fixed at 3–3.6V.

Availability

MID02W0303AGY-3R-P is available at Aetrix Electronics and suitable for industrial sensor isolation, RS-485/CAN bias supply, digital isolator powering, and 5G RRU auxiliary power applications requiring stable component supply across extended temperature and safety-critical environments.

Supply support for MID02W0303AGY-3R-P 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, including DC/DC converters, LED drivers, and motor drivers, with design centers in the US, China, and Taiwan.

The MID series targets compact, fully integrated isolated DC/DC converters for industrial, telecom, and automotive subsystems where board space, thermal performance, and regulatory compliance are critical constraints.

FAQ

What is the maximum continuous output current supported by the MID02W0303AGY-3R-P?

The device delivers up to 75mA continuously at 3.3V output, corresponding to its 0.25W maximum output power rating. This is verified across the full –40°C to +125°C operating temperature range with ≤0.2% load regulation, making it suitable for driving multiple low-power isolated interfaces simultaneously.

Does the MID02W0303AGY-3R-P require external feedback components?

No. The device integrates all regulation circuitry-including transformer-coupled feedback-within the SOICW-16 package. No external optocouplers, TL431 references, or compensation networks are needed, reducing design complexity and improving long-term stability versus discrete solutions.

How does the 3kVDC isolation rating impact PCB layout requirements?

The 3kVDC rating mandates ≥8mm minimum creepage and clearance between primary (pins 1–8) and secondary (pins 9–16) sides. Layout must physically separate GND1 and GND2 planes, avoid overlapping copper on inner layers, and use stitching vias only within respective ground domains to maintain isolation integrity.

Can the MID02W0303AGY-3R-P operate with a 2.8V input?

No. The under-voltage lockout (UVLO) rising threshold is 2.61V, but the specified minimum operating input is 3V. Operation below 3V is not guaranteed-output regulation degrades, and the device may enter hiccup mode or shut down unpredictably due to insufficient headroom for internal circuitry.

What is the purpose of separating SGND1 and SGND2 in the pinout?

SGND1 and SGND2 provide dedicated signal return paths for primary and secondary sides respectively. Separating them prevents noise coupling between input and output domains, reduces common-mode EMI, and enables proper implementation of the internal feedback loop-critical for achieving <80mV output ripple and CISPR32 Class B compliance.

Is the MID02W0303AGY-3R-P compliant with AEC-Q200 for automotive use?

No. While it operates from –40°C to +125°C and meets IEC62368-1, it is not AEC-Q200 qualified. It is intended for industrial, telecom, and commercial applications. For automotive-grade isolated bias, MPS offers the MPQ2772 series with full AEC-Q200 qualification and extended temperature validation.