MIC5399-SSYMX-T5 Microchip Integrated Circuit (Other) In Stock
The MIC5399-SSYMX-T5 is a dual 300 mA fixed-output LDO regulator with a 160 mV typical dropout voltage and a 2.8 V to 5.5 V input range. Both channels operate independently with a maximum 380 mV dropout at full load in a compact X2DFN-8 package. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- MIC5399-SSYMX-T5 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual independent 300 mA LDO channels with a typical 160 mV dropout voltage for minimal power dissipation
- 2.8 V to 5.5 V input range covers single-cell Li-ion through 5 V USB supplies
- Ultra-compact X2DFN-8 package with only 380 mV maximum dropout, ideal for space-constrained multi-rail designs
Applications
The MIC5399-SSYMX-T5 is well suited for dual-rail IoT modules and wireless SoC designs that require separate, independently switchable 1.8 V and 3.3 V supply rails from a single Li-ion battery. Its low 160 mV typical dropout extends usable battery runtime by keeping regulation active closer to the battery's end-of-discharge voltage. It also simplifies power tree design on compact Bluetooth and Wi-Fi modules where board area is limited to a few square millimeters.
Specifications
| Manufacturer Package Code | X2DFN-8 |
| Reach Compliance Code | Compliant |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.38V |
| Dropout Voltage1-Nom | 0.16V |
| Dropout Voltage2-Max | 0.38V |
| Input Voltage Absolute-Max | 6V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.8V |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0135% |
| Load Regulation-Max | 0.04% |
| Number of Functions | 1 |
| Number of Outputs | 2 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.3A |
| Output Current2-Max | 0.3A |
| Output Voltage1-Max | 3.399V |
| Output Voltage1-Min | 3.201V |
| Output Voltage1-Nom | 3.3V |
| Output Voltage2-Max | 3.399V |
| Output Voltage2-Min | 3.201V |
| Output Voltage2-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.05,16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR |
| Surface Mount | NO |
| Technology | CMOS |
| Terminal Finish | MATTE TIN |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.4mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 3% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the dropout voltage of MIC5399-SSYMX-T5 and how does it affect battery runtime in a Li-ion application?
The MIC5399-SSYMX-T5 has a typical dropout voltage of 160 mV and a maximum of 380 mV at 300 mA. For a 3.3 V output from a Li-ion battery, regulation is maintained down to approximately 3.46 V typical battery voltage, allowing roughly 15% more discharge capacity compared to a conventional LDO with a 500 mV dropout, which meaningfully extends runtime in wearables and IoT sensors.
Can both channels of MIC5399-SSYMX-T5 operate simultaneously at full 300 mA load?
Yes. Both LDO channels are fully independent and each rated for 300 mA continuous output current, so the device can supply a combined 600 mA from a single input rail within the 2.8 V to 5.5 V range. Thermal design should account for the total power dissipation of both channels running simultaneously, since the X2DFN-8 package has a limited thermal pad area for heat spreading.
Which dual-rail SoC designs benefit most from the MIC5399-SSYMX-T5 versus two separate single LDOs?
Designs such as Bluetooth Low Energy modules and Wi-Fi chipsets that require both a 1.8 V core rail and a 3.3 V I/O rail up to 300 mA each benefit from using MIC5399-SSYMX-T5 because it replaces 2 separate SOT-23 LDOs with a single X2DFN-8 footprint, saving at least 4 mm² of board area and reducing BOM line items by one part. The matched dropout specification across both channels also simplifies power sequencing analysis.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”