Monolithic Power Systems Inc. MID02W0303AGY-2R-P

Overview

MID02W0303AGY-2R-P from Monolithic Power Systems is a regulated, isolated 3.3V-output DC/DC converter delivering up to 0.25W across a 3V–3.6V input range, featuring 1.5kVDC isolation, ±0.2% load regulation, and operation from –40°C to +125°C. It integrates power MOSFET, transformer, and feedback circuitry in a single SOICW-16 package for industrial isolated bias supply applications.

For engineers reviewing the MID02W0303AGY-2R-P datasheet, MID02W0303AGY-2R-P pinout, MID02W0303AGY-2R-P application, or MID02W0303AGY-2R-P equivalent, key selection criteria include input voltage compatibility (3–3.6V), output stability under transient load (≤0.2% load regulation), thermal shutdown threshold (160°C), and compliance with CISPR32 Class B emissions and UL1577/IEC62368-1 safety standards.

Technical Context

The MID02W0303AGY-2R-P implements an integrated flyback topology with internal primary-side switching and secondary-side feedback decoding. Its isolation barrier separates PGND1/SGND1 (primary) from PGND2/SGND2 (secondary), enabling galvanic separation between input and output domains while maintaining tight output regulation via on-chip error amplification.

It employs hiccup-mode short-circuit protection with ~150ms off-time and 15ms soft-start ramp, coupled with non-latching UVLO (2.61V rising threshold, 190mV hysteresis). Thermal shutdown activates at 160°C with 20°C hysteresis, ensuring robust fault recovery without external supervision.

Key Specifications

Pinout & Package

Available in a low-profile, wide-body SOICW-16 package (10.3mm × 7.5mm × 2.3mm), the MID02W0303AGY-2R-P features dual ground domains and symmetrical pin grouping to minimize EMI and support safe creepage/clearance (>8mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RECOM R1SX-3.3 and ADuM6000, the MID02W0303AGY-2R-P delivers superior load regulation (0.2% vs. >5% or unregulated), compact SOICW-16 integration, and full safety certification out-of-box-making it optimal for space-constrained, high-stability industrial I/O designs.

Availability

MID02W0303AGY-2R-P is available at Aetrix Electronics and suitable for industrial automation I/O modules, isolated RS-485/CAN interface designs, and telecom remote radio unit sensor subsystems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MID02W0303AGY-2R-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, with over two decades of leadership in integrated DC/DC conversion and motor control solutions.

The MID series targets ultra-compact, fully integrated isolated DC/DC converters for industrial and telecom applications where board space, reliability, and regulatory compliance are critical constraints.

FAQ

What is the maximum capacitive load the MID02W0303AGY-2R-P can drive?

The device supports up to 330μF capacitive load when paired with a 45Ω resistive load, as verified in electrical characterization. Exceeding this value may trigger hiccup-mode protection during startup due to inrush current. For larger loads, add a soft-start RC network at the output or use a current-limiting ferrite bead.

Does the MID02W0303AGY-2R-P require external feedback components?

No. The MID02W0303AGY-2R-P integrates all regulation circuitry-including error amplifier, reference, and feedback decoder-within the SOICW-16 package. No external resistors, capacitors, or optocouplers are needed to maintain 3.3V output accuracy across temperature and load.

How does the 1.5kVDC isolation rating impact PCB layout requirements?

The 1.5kVDC rating mandates ≥8mm minimum creepage and clearance between primary-side (pins 1–8) and secondary-side (pins 9–16) copper features. This requires physical separation of GND1 and GND2 planes, no shared vias across the isolation barrier, and adherence to IPC-2221B spacing rules for reinforced insulation.

Can the MID02W0303AGY-2R-P operate with input voltages below 3V?

No. The under-voltage lockout (UVLO) rising threshold is 2.61V, but the device is only specified and characterized for stable operation within 3V–3.6V. Operation below 3V may result in undefined regulation behavior, reduced efficiency, or failure to start-per Absolute Maximum Ratings and Recommended Operating Conditions.

What is the purpose of separating SGND1 and SGND2 with different trace widths?

SGND1 connects to PGND1 using wide traces to improve thermal conduction and reduce switching noise coupling into the primary control circuit. SGND2 connects to PGND2 via a thin trace to limit high-frequency current return paths across the isolation barrier-suppressing common-mode EMI radiation and preserving CISPR32 Class B compliance.

Is the MID02W0303AGY-2R-P RoHS and halogen-free compliant?

Yes. All MPS parts, including the MID02W0303AGY-2R-P, are lead-free, halogen-free, and fully compliant with the EU RoHS Directive. Green status documentation and material declarations are available on the Monolithic Power Systems website under Quality Assurance.