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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
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