MIC5219-3.3YML TR Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
Microchip MIC5219-3.3YML TR is a fixed 3.3 V LDO linear voltage regulator with 500 mA output current capability. It features low dropout voltage, low quiescent current, and stable operation with small output capacitors in a 6-pin MLF (QFN) package. Available on tape and reel worldwide for power supply regulation in portable electronics.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 7
- Lifecycle
- ACTIVE
- Datasheet
- MIC5219-3.3YML TR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output LDO regulator with 500 mA output current rating
- Low dropout voltage enabling efficient regulation from 3.5 V to 16 V input range
- Low quiescent current for extended battery life in portable applications
- Stable with small ceramic output capacitors reducing external BOM cost
- Compact 6-pin MLF (QFN) package for space-efficient power rail implementation
Applications
The MIC5219-3.3YML TR is widely used to generate regulated 3.3 V rails for microcontrollers, FPGAs, and wireless modules in portable consumer electronics and IoT sensor platforms. Its 500 mA current capacity supports simultaneous powering of multiple digital ICs from a higher-voltage battery or USB 5 V source. The tiny MLF-6 package makes it suitable for compact wearables, Bluetooth beacons, and handheld instruments requiring an efficient linear post-regulator.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output current rating of the MIC5219-3.3YML TR and which load profiles does it handle reliably?
The MIC5219-3.3YML TR provides up to 500 mA of continuous output current at 3.3 V, sufficient to supply a typical microcontroller drawing 10–50 mA, a Wi-Fi or BLE module drawing up to 200 mA peak, and additional peripheral ICs simultaneously without exceeding the regulator's thermal limits in a properly designed PCB layout.
How does the MLF-6 package of the MIC5219-3.3YML TR benefit PCB space optimization in wearable designs?
The MLF-6 (QFN) package measures approximately 2 mm x 2 mm, which is roughly 60% smaller than an equivalent SOT-23-5 package for comparable LDOs. This small footprint enables placement of the 3.3 V power supply within tight layout constraints typical of wearable PCBs where total board area is limited to below 300 mm squared.
Can the MIC5219-3.3YML TR power a 3.3 V microcontroller directly from a single-cell LiPo battery at 3.7 V nominal?
Yes, with a nominal 3.7 V LiPo cell and the LDO's low dropout voltage typically below 400 mV at 500 mA, the MIC5219-3.3YML TR maintains a stable 3.3 V output down to approximately 3.5 V input before dropout. This means the regulator continues to supply the microcontroller until the battery discharges below 3.5 V, extracting additional capacity versus higher-dropout alternatives.
What type of output capacitor is required for stability with the MIC5219-3.3YML TR, and does it support ceramic types?
The MIC5219-3.3YML TR is designed for stability with small ceramic output capacitors as low as 1 µF, unlike older LDO designs requiring tantalum capacitors with specific ESR ranges. This eliminates ESR-matching concerns, reduces BOM cost, and allows use of compact 0402 or 0603 ceramic capacitors in the output filter, simplifying PCB layout for high-density boards.
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