LP2951CS-L-5-0 EXAR Power Supply (Small Outline Packages) In Stock
The EXAR LP2951CS-L-5-0 is a fixed 5.0 V low-dropout (LDO) voltage regulator in an SOIC-8 package with a maximum 0.45 V dropout voltage and up to 30 V input tolerance. It delivers 0.01% line and load regulation for precise, stable power rail management. Available RoHS-compliant with worldwide shipping for portable, battery-powered, and industrial electronic designs.
- Manufacturer
- EXAR
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- TRANSFERRED
- Datasheet
- LP2951CS-L-5-0 Datasheet PDF
- Category
- Power Supply
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LP2951CS-L-5-0?
- Fixed 5.0 V output with only 0.45 V maximum dropout, enabling regulation from input supplies as low as 5.45 V
- Exceptional 0.01% line and load regulation for stable precision voltage rails in sensitive analog and sensor circuits
- Wide 30 V absolute maximum input range accommodates broad supply variation in industrial and automotive power systems
What is LP2951CS-L-5-0 used for?
The LP2951CS-L-5-0 is well suited for portable devices, battery-powered instruments, and embedded processors that require a regulated 5 V rail from unregulated or varying input supplies. Its low 0.45 V dropout voltage maximizes battery runtime by maintaining regulation even as the supply approaches the output level. The compact SOIC-8 package and tight 0.01% regulation accuracy also make it an excellent choice for precision analog front ends, ADC reference supplies, and sensor bias rails in industrial and medical electronics.
What are the specifications of LP2951CS-L-5-0?
| Adjustability | FIXED/ADJUSTABLE |
| Dropout Voltage1-Max | 0.45V |
| Dropout Voltage1-Nom | 0.38V |
| Input Voltage Absolute-Max | 30V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.01% |
| Load Regulation-Max | 0.01% |
| 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 | 5.1V |
| Output Voltage1-Min | 4.9V |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | BULK |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED/ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 2% |
| 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 LP2951CS-L-5-0 datasheet?
LP2951CS-L-5-0 Datasheet DownloadOfficial datasheet from EXAR
What are equivalent replacements for LP2951CS-L-5-0?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low can the input supply drop before the LP2951CS-L-5-0 loses regulation?
The LP2951CS-L-5-0 has a maximum dropout voltage of 0.45 V, so the input supply must stay above 5.45 V to maintain the regulated 5 V output. The nominal dropout is only 0.38 V, which extends usable battery life in 6 V alkaline or single-cell Li-ion powered systems by delaying the point at which the output dips out of specification.
What line and load regulation performance does the LP2951CS-L-5-0 offer for precision analog circuits?
The LP2951CS-L-5-0 specifies both line and load regulation at a maximum of 0.01%, keeping the 5 V output virtually constant across its full 30 V input range and across load current changes. This tight tolerance makes it ideal for powering ADC reference circuits, precision op-amp stages, and sensor bias networks where output stability directly affects measurement accuracy.
When should a designer choose the LP2951CS-L-5-0 LDO over a switching regulator for a noise-sensitive 5 V rail?
Unlike switching regulators that generate ripple at 100 kHz to several MHz and require extensive LC filtering, the LP2951CS-L-5-0 produces a clean linear 5 V output with no switching noise. For audio preamplifiers, RF front ends, or precision data-acquisition boards powered from a 6 V to 30 V bus, this clean 0.01% regulated output avoids interference that would otherwise degrade signal-to-noise ratio below acceptable limits.
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 EXAR
EXAR is a leading electronic component manufacturer. FindMyChip sources EXAR ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from EXAR
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
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