L78L33ABD STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
The L78L33ABD is a fixed 3.3 V linear voltage regulator delivering up to 100 mA output current in a compact 8-pin SOIC package. It accepts input voltages from 5.3 V to 20 V and features internal current limiting and thermal shutdown protection. Available from stock worldwide with same-day shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- L78L33ABD Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0588(MOQ 3145)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L78L33ABD?
- Fixed 3.3 V output with ±2% accuracy across line and load variations
- 100 mA output current capacity with internal current limiting and thermal overload protection
- Wide input voltage range of 5.3 V to 20 V with only 1.7 V typical dropout voltage
What is L78L33ABD used for?
The L78L33ABD is widely used to supply stable 3.3 V rails in battery-powered IoT devices, sensor modules, and embedded microcontroller boards where board space is limited. It serves as a post-regulator in multi-rail power architectures and is ideal for powering low-current logic circuits, reference circuits, and wireless communication modules requiring a clean, regulated supply.
What are the specifications of L78L33ABD?
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 1.7V |
| Input Voltage Absolute-Max | 30V |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 5.3V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.15% |
| Load Regulation-Max | 0.06% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.1A |
| Output Voltage1-Max | 3.465V |
| Output Voltage1-Min | 3.135V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | NICKEL PALLADIUM GOLD SILVER |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 5% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the L78L33ABD datasheet?
L78L33ABD Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L78L33ABD?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output current the L78L33ABD can supply in a continuous operating condition?
The L78L33ABD is rated for a maximum continuous output current of 100 mA. This makes it suitable for powering low-power microcontrollers, sensors, and logic circuits that draw modest current from a regulated 3.3 V rail.
How wide is the input voltage range of the L78L33ABD and what is its dropout voltage?
The L78L33ABD accepts input voltages between 5.3 V and 20 V, with a maximum absolute rating of 30 V. Its typical dropout voltage is 1.7 V, meaning the input must exceed 5 V to maintain a regulated 3.3 V output under full 100 mA load.
In which applications is the L78L33ABD a better fit than a switching regulator?
The L78L33ABD suits noise-sensitive analog designs, RF front-end circuits, and sensor interfaces where low output ripple and minimal EMI are critical. At currents below 100 mA with input-output differentials under 5 V, the thermal dissipation remains manageable and the simplicity of the 8-pin SOIC design reduces BOM cost and PCB area compared to a switching converter.
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 STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 3145+ | $0.0636 | $200.02 |
| 4085+ | $0.0612 | $250.00 |
| 5105+ | $0.0588 | $300.17 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit