Microchip Technology MIC5317-3.3YM5-TR

The MIC5317-3.3YM5-TR supplies a regulated 3.3 V rail and supports loads up to 150 mA. The family operating input range is 2.5 V to 6.0 V, while this 3.3 V option requires VIN to remain above VOUT by the applicable dropout margin. It combines low typical ground current, high power-supply rejection, ceramic-capacitor stability, shutdown control, current limiting, and thermal shutdown for compact portable and mixed-signal designs.

The exact M5 order-code suffix identifies Microchip's 5-lead SOT-23 package. The catalog field also lists generic or alternate aliases; the manufacturer-controlled SOT-753 designation and existing registered image are used here.

Layout checks

• Verify the SOT-753 pin-1 indicator and land pattern before release.
• Place the input and output capacitors close to their pins and the ground return.
• Keep the enable trace at a defined logic level and away from noisy switching nodes.
• Check junction temperature from voltage drop, load current, copper area, and ambient conditions.

The configured local JPG exists and was visually checked as a five-lead SOT-23 style package illustration. Production availability is verified separately before publication.

The following assignment is for the M5 SOT-23-5 package.

The four-lead DFN version uses a different pin arrangement; use the SOT-753 drawing for this exact order code.

Typical and maximum values depend on the stated electrical test conditions. For a 3.3 V output, maintain sufficient input headroom for the required load current.

Replacement selection must preserve the 3.3 V fixed output, 150 mA load requirement, SOT-753 footprint and pin order, input range, active-high enable behavior, capacitor stability, and thermal performance. Other MIC5317 voltage or package variants require separate electrical and mechanical review and are not unconditional substitutes.

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

Microchip Technology identifies MIC5317 as a high-performance single 150 mA LDO. The `-3.3` segment specifies the 3.3 V output, `Y` specifies the -40 degrees C to +125 degrees C junction-temperature option, `M5` specifies the five-lead SOT-23 package, and `TR` is the tape-and-reel media designator.

Confirm the full order code, reel label, package marking, pin-1 indicator, and traceability information during incoming inspection. Electrical verification should use the limits and conditions in the latest manufacturer-controlled data sheet. Package appearance alone does not establish authenticity or compliance.

Validate dropout headroom, load transients, capacitor bias derating, thermal rise, enable thresholds, and the exact SOT-753 land pattern in the final circuit. Do not exceed the operating ratings, and calculate junction temperature from actual input voltage, output voltage, load current, ambient temperature, and board thermal conditions.