MIC5259-3.3YD5 Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MIC5259-3.3YD5 is a 300mA low-dropout linear voltage regulator fixed at 3.3V output in a compact SOT-23-5 package. It accepts 2.7V to 6V input, features a 550mV maximum dropout voltage, and operates from -40°C to +125°C for portable and industrial power supply designs.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MIC5259-3.3YD5 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3V output LDO regulator with 300mA maximum output current from a 2.7V to 6V input
- 550mV maximum dropout voltage enabling operation close to the output rail for battery-powered devices
- -40°C to +125°C industrial temperature range supporting harsh environment deployments
- Ultra-compact SOT-23-5 package minimizing PCB footprint in space-constrained designs
- Low quiescent current for extended battery life in always-on IoT and portable applications
Applications
The MIC5259-3.3YD5 is ideal for powering 3.3V microcontrollers, sensors, and wireless modules in battery-operated IoT devices, wearables, and portable instruments where board space is at a premium. Its 550mV low dropout allows it to extract maximum energy from lithium-ion batteries discharging from 3.7V down toward 3.3V, extending runtime compared to standard LDOs. The -40°C to +125°C range also makes it suitable for automotive accessories, outdoor environmental monitors, and industrial field instruments requiring reliable regulation over wide temperature swings.
Specifications
| YTEOL | 7.3 |
| Dropout Voltage1-Max | 0.55V |
| Input Voltage-Max | 6V |
| Input Voltage-Min | 2.7V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.3A |
| Output Voltage1-Max | 3.3495V |
| Output Voltage1-Min | 3.2505V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 1.5% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How close to the output voltage can the MIC5259-3.3YD5 input voltage drop before regulation fails?
The MIC5259-3.3YD5 has a maximum dropout voltage of 550mV, meaning it maintains 3.3V regulation as long as the input stays above 3.85V. This low dropout characteristic is critical for single-cell Li-ion or LiPo battery applications where the cell voltage falls from 4.2V at full charge toward 3.5V as it discharges, extending usable battery life significantly versus a standard 1.2V-dropout LDO.
What load current can the MIC5259-3.3YD5 supply, and is it suitable for powering a BLE module?
The MIC5259-3.3YD5 supplies up to 300mA continuous output current at 3.3V. Bluetooth Low Energy modules typically draw 10mA to 30mA in transmit mode and under 1mA in sleep mode, well within the 300mA capability. A single MIC5259-3.3YD5 can simultaneously power the BLE module and a low-power MCU in the same 3.3V domain without additional paralleling.
Does the MIC5259-3.3YD5 suit automotive or outdoor industrial designs with wide temperature swings?
Yes, the MIC5259-3.3YD5 is rated from -40°C to +125°C junction temperature, covering both AEC-Q100 automotive Grade 1 and industrial temperature requirements. Its SOT-23-5 package dissipates up to (Vin - 3.3V) x 300mA, so thermal management must be verified at maximum input voltage and load, but for typical 5V-input, 100mA applications the power dissipation stays below 200mW, well within package limits.
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