L9777B STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
L9777B is a fixed low-dropout voltage regulator from STMicroelectronics supporting input voltages from 6.6 V to 31 V with a 0.1 V dropout voltage and line/load regulation of 0.025%. Available in SO-12 package with worldwide shipping from stock.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 13
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- L9777B Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L9777B?
- Input voltage range 6.6 V to 31 V absolute max 40 V
- Ultra-low dropout voltage of only 0.1 V
- Excellent line and load regulation of 0.025%
- Fixed output in compact SO-12 package
- Single-function LDO optimized for automotive and industrial use
What is L9777B used for?
The L9777B is designed for automotive body electronics and industrial power management systems requiring stable regulated voltages from wide-input battery supplies up to 31 V. Its ultra-low 0.1 V dropout voltage makes it ideal for low-loss power rails in always-on ECU subsystems and sensor supply circuits. The small SO-12 footprint and robust input voltage range simplify board design in space-constrained automotive modules.
What are the specifications of L9777B?
| YTEOL | 6.16 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 0.1V |
| Input Voltage Absolute-Max | 40V |
| Input Voltage-Max | 31V |
| Input Voltage-Min | 6.6V |
| JESD-30 Code | R-PDSO-G12 |
| Line Regulation-Max | 0.025% |
| Load Regulation-Max | 0.025% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 150°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.05A |
| Output Voltage1-Max | 5.1V |
| Output Voltage1-Min | 4.9V |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP12,.25,32 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE, SHRINK PITCH |
| Packing Method | TRAY |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.8mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 2% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Morocco |
Where can I find the L9777B datasheet?
L9777B Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L9777B?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the L9777B support, and is it suitable for 12 V automotive battery systems?
The L9777B accepts input voltages from 6.6 V to 31 V with an absolute maximum of 40 V, making it well suited for 12 V automotive battery rails that can surge to 28 V during load dump. Its wide input range covers cranking dips and load-dump transients found in standard 12 V vehicle electrical systems.
How low is the dropout voltage of the L9777B and why does it matter for efficiency?
The L9777B features a typical dropout voltage of 0.1 V, which minimizes power dissipation across the regulator at full load. This near-zero dropout is critical in battery-powered designs where every millivolt of headroom extends operating time and reduces heat generation in the SO-12 package.
What level of output accuracy does the L9777B provide under varying line and load conditions?
The L9777B specifies both line regulation and load regulation at a maximum of 0.025%, ensuring the output voltage stays extremely stable across the 6.6 V to 31 V input range and varying load currents. This precision is important for powering analog sensors or reference circuits in industrial and automotive ECUs that demand tightly regulated 5 V or 3.3 V rails.
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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.
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