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
What are the key features of ZLDO1117QG33TA?
- 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
What is ZLDO1117QG33TA used for?
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.
What are the specifications of ZLDO1117QG33TA?
| 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 |
Where can I find the ZLDO1117QG33TA datasheet?
ZLDO1117QG33TA Datasheet DownloadOfficial datasheet from Diodes Inc.
What are equivalent replacements for ZLDO1117QG33TA?
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.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
| 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 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
BD33GC0WEFJ-E2
ROHM Semiconductor
Power Supply
TMF 10115
Traco Power
Power Supply
TMF 10112
Traco Power
Power Supply
TNY275GN-TL
Power Integrations
Power Supply
SCW03C-12
Mean Well
Power Supply
SCW03A-12
Mean Well
Power Supply
V150C28C150BL
VICOR
Power Supply
V150C24C150BL
VICOR
Power Supply
TMG 30115
Traco Power
Power Supply
TMG 30103
Traco Power
Power Supply
THM 10-1212
Traco Power
Power Supply
THM 10-4811
Traco Power
Power Supply
THM 10-1213
Traco Power
Power Supply
THM 10-0511
Traco Power
Power Supply
THM 10-1215
Traco Power
Power Supply
THM 10-1222
Traco Power
Power Supply
THM 10-2422
Traco Power
Power Supply
THM 10-0523
Traco Power
Power Supply
THM 10-1223
Traco Power
Power Supply
THM 10-4822
Traco Power
Power Supply
THM 10-2410
Traco Power
Power Supply
THM 10-2412
Traco Power
Power Supply
THM 10-4810
Traco Power
Power Supply
THM 10-0513
Traco Power
Power Supply