ZLDO1117QG33TA Diodes Inc. Power Supply (SOT223 (3-Pin)) In Stock
Diodes Inc. ZLDO1117QG33TA is a fixed 3.3V low dropout linear regulator in SOT-223 package with up to 1A output current and 1.2V maximum dropout voltage. Input voltage range is 4.8V to 18V with Pb-free RoHS-compliant construction. Available in stock worldwide with competitive pricing.
- Manufacturer
- Diodes Inc.
- Package
- SOT223 (3-Pin)
- Pin Count
- 4
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- ZLDO1117QG33TA Datasheet PDF
- Category
- Power Supply
- Price
- From $0.2000(MOQ 25)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3V output with up to 1A current capability for powering microcontrollers and FPGAs
- Low 1.11V nominal dropout voltage reduces power dissipation compared to standard LDOs
- Wide 4.8V to 18V input range accepts unregulated adapter, automotive, and USB power sources
- SOT-223 package with exposed thermal pad for improved heat dissipation without external heatsink
Applications
The ZLDO1117QG33TA is designed for post-regulation of 5V or 12V rails down to 3.3V in microcontroller boards, single-board computers, and FPGA development platforms. Its 1A output and SOT-223 thermal pad make it suitable for powering I/O banks, memory modules, and wireless communication modules in IoT gateways. The wide input range also allows direct use with automotive 12V rails when combined with input filtering capacitors.
Specifications
| Pbfree Code | No |
| Factory Lead Time | 12Weeks |
| YTEOL | 3 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 1.2V |
| Dropout Voltage1-Nom | 1.11V |
| Input Voltage Absolute-Max | 18V |
| Input Voltage-Max | 18V |
| Input Voltage-Min | 4.8V |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.04752% |
| Load Regulation-Max | 0.013% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 3.365V |
| Output Voltage1-Min | 3.235V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOT-223 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Screening Level | AEC-Q100 |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2% |
| Package | SOT223 (3-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 | Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage and current can the ZLDO1117QG33TA supply for a 3.3V microcontroller rail?
The ZLDO1117QG33TA delivers a fixed 3.3V output at up to 1A continuous current, with a dropout voltage of 1.11V nominal and 1.2V maximum. This means it requires at least a 4.42V input to maintain regulation, making it compatible with 5V USB power or 5V regulated bus rails commonly found in embedded system designs.
How does the SOT-223 package of ZLDO1117QG33TA help manage thermal dissipation at full load?
The SOT-223 package includes a large exposed metal tab soldered to the PCB copper pour, acting as a heatsink that dissipates heat from the regulator junction. At 1A load with a 5V input supplying 3.3V output, power dissipation is approximately 1.7W; the SOT-223 thermal pad reduces junction-to-ambient resistance to keep junction temperature within safe limits without an external heatsink.
Can ZLDO1117QG33TA operate directly from a 12V automotive battery rail?
Yes, the ZLDO1117QG33TA accepts input voltages from 4.8V up to 18V absolute maximum, covering the 9V–16V range of a 12V automotive battery system. However, designers must limit the output current to keep power dissipation below the thermal limits of the SOT-223 package, typically derated below 0.5A when the input-to-output differential exceeds 8V without additional heatsinking.
What output capacitor is recommended to ensure ZLDO1117QG33TA stability under load transients?
The ZLDO1117QG33TA requires a minimum 10µF output capacitor with ESR between 0.1Ω and 1Ω for stable loop compensation, following standard LDO117 family specifications. A 10µF tantalum or low-ESR electrolytic capacitor placed within 1mm of the output pin handles load transients up to 1A, while an additional 100nF ceramic capacitor in parallel improves high-frequency noise rejection for sensitive analog circuits.
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About Diodes Inc.
Diodes Inc. is a leading electronic component manufacturer. FindMyChip sources Diodes Inc. ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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Diode
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $0.3540 | $8.85 |
| 100+ | $0.3073 | $30.73 |
| 250+ | $0.2854 | $71.36 |
| 500+ | $0.2723 | $136.15 |
| 1000+ | $0.2352 | $235.20 |
| 3000+ | $0.2000 | $600.00 |
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