Microchip Technology MIC5528-3.3YMT-TR

The MIC5528-3.3YMT-TR regulates a fixed 3.3 V rail at load currents up to 500 mA. It operates from 2.5 V to 5.5 V, subject to adequate dropout headroom for this output option. Low ground current, ceramic-capacitor stability, active-high enable, output auto-discharge, current limiting, and thermal shutdown support compact portable and point-of-load designs.

The MT suffix identifies Microchip's 6-lead 1.2 mm by 1.2 mm by 0.6 mm TDFN package with an exposed pad. The catalog registers this package as 6-UFDFN Exposed Pad.

Layout checks

• Use the current Microchip MT land pattern and verify pin-1 orientation.
• Connect the exposed pad to ground for thermal performance.
• Place the input and output capacitors close to the regulator with short returns.
• Check junction temperature from voltage drop, load current, copper area, and ambient conditions.

The configured local JPG exists and was visually checked as a six-terminal exposed-pad DFN illustration. Production availability is verified separately before publication.

The assignment below applies to the 6-lead MT TDFN top view.

The MX extra-thin version has the same functional pin map but a different package height designation.

Typical and maximum values apply only under their stated test conditions. Verify voltage headroom and thermal dissipation in the final circuit.

A candidate replacement must match the fixed 3.3 V output, 500 mA load requirement, 1.2 mm by 1.2 mm MT TDFN footprint, duplicated VOUT pins, enable behavior, output discharge, ground-connected exposed pad, capacitor stability, dropout performance, and thermal limits. The MIC5528 MX option is thinner and requires a mechanical package review.

No internal replacement link is asserted without an exact catalog match and engineering review.

Microchip identifies MIC5528 as a single high-performance 500 mA LDO with auto-discharge and internal enable pull-down. In the order code, 3.3 specifies the output voltage, Y specifies the -40 degrees C to +125 degrees C junction range, MT specifies the 6-lead thin TDFN, and TR specifies the 5,000-piece reel.

Confirm the full MIC5528-3.3YMT-TR order code, reel label, package marking, pin-1 indicator, TDFN dimensions, and lot traceability during incoming inspection. Package appearance alone does not establish identity or authenticity. Electrical checks should follow the latest Microchip limits and conditions.

Validate dropout headroom, line and load transients, capacitor bias derating, auto-discharge timing, enable thresholds, exposed-pad grounding, and junction temperature in the final PCB. At 500 mA, even modest input-to-output voltage difference can create substantial heat in the miniature package.