The LP2951CD is a precision linear voltage regulator integrated circuit manufactured by AMI Semiconductor/onsemi, designed to deliver reliable power management in space-constrained electronic applications. This low dropout (LDO) regulator belongs to the power management IC category and specifically addresses the critical design challenge of maintaining stable voltage output even when the input voltage is only marginally higher than the desired output voltage.
This surface-mount device operates as a positive voltage regulator with adjustable output capability, delivering up to 100mA of output current while maintaining exceptional efficiency through its low dropout characteristics. The regulator features a maximum dropout voltage of just 0.45V at full 100mA load, making it ideal for battery-powered applications where maximizing usable battery life is crucial. The device accepts input voltages ranging from the minimum required for regulation up to 30V maximum, while providing adjustable output voltages from 1.235V minimum up to 30V maximum, with a standard 5V fixed option available.
The LP2951CD incorporates comprehensive protection features including over-current and over-temperature protection, ensuring reliable operation under adverse conditions and preventing damage to both the regulator and downstream circuitry. The device operates across an extended temperature range from -40°C to 125°C, making it suitable for industrial, automotive, and harsh environment applications. With a quiescent current of only 120µA and maximum supply current of 12mA, this regulator minimizes power consumption in standby and active modes.
Housed in a compact 8-SOIC package measuring 0.154 inches (3.90mm) in width, the LP2951CD addresses space constraints in modern electronic designs while providing easy surface-mount assembly compatibility. The single regulator configuration simplifies circuit design and reduces component count, while the tube packaging format facilitates automated assembly processes.
Primary applications include battery-powered portable devices, automotive electronics, industrial control systems, telecommunications equipment, and any application requiring stable, low-noise voltage regulation with minimal power loss. The adjustable output feature makes it particularly valuable in applications requiring non-standard voltage levels or where fine-tuning of output voltage is necessary for optimal system performance.
Equivalent and alternative models include the LP2951ACN, LP2951CN, and LP2951ACM from the same manufacturer, which offer similar functionality in different package configurations. Industry alternatives include the LM2931 series from Texas Instruments, the AMS1117 series from Advanced Monolithic Systems, the SPX2951 from MaxLinear, and the MIC5205 from Microchip Technology. Other comparable devices include the LT1129 from Analog Devices, the REG1117 from Texas Instruments, and various offerings from STMicroelectronics such as the LD1117 series. These alternatives may offer different current ratings, package options, or specific feature sets while maintaining similar core LDO regulator functionality. It's important to note that this particular model is RoHS non-compliant, which may influence selection decisions in applications requiring environmental compliance standards.
LP2951CD (1)
LP2951CD Key Technical Attributes
Output current: 100mA
Input voltage maximum: 30V
Voltage drop-out (max): 0.45V @ 100mA
LP2951CD Packing Size
The LP2951CD comes in an 8-SOIC surface-mount package, featuring a compact design with a 3.90mm width and 0.154" outline. Encased in a standard tube for safe shipping, its pin configuration aligns with industry norms for linear voltage regulators. The 8-pin SOIC format offers good heat dissipation and stability for PMIC applications.
LP2951CD Application
This linear, low drop-out (LDO) voltage regulator fits perfectly in applications requiring precise voltage regulation, such as instrumentation, automotive systems, portable devices, sensor interfaces, and embedded designs. It is especially useful where high efficiency and low quiescent current are key, even at extended temperature ranges (-40°C to 125°C).
LP2951CD Features
The LP2951CD presents an adjustable positive output (from 1.235V to 30V), catering to a wide range of system voltages. It supports a maximum supply current of 12 mA and features a quiescent current of just 120µA, which makes it highly suitable for low-power environments. Built-in protection features include over-current and over-temperature guards, preventing damage due to excessive load or environmental stress. The surface-mount 8-SOIC package simplifies board assembly, reduces layout complexity, and enhances reliability in space-constrained designs. Additionally, the regulator maintains stable output across a single channel and excels at reducing voltage drops up to 0.45V at full load.
LP2951CD Quality and Safety Features
Robustness and safety are assured via integrated over-current and over-temperature protection mechanisms, ensuring operational reliability. However, please note that while the part provides excellent electrical safeguards, it is RoHS non-compliant, which may be relevant for certain applications with strict environmental standards.
LP2951CD Compatibility
With its adjustable output and single regulator configuration, the LP2951CD boasts broad compatibility with a variety of microcontroller platforms, embedded modules, and analog circuits. Its operating temperature range supports deployment in both industrial and harsh environments. The SOIC package design allows for seamless integration into standard surface-mount manufacturing procedures.
LP2951CD Datasheet PDF
For the most comprehensive technical details on the LP2951CD, our website hosts the most authoritative, manufacturer-verified datasheet for this product model. We strongly recommend that customers download the datasheet directly from this page to ensure accurate information for design and verification purposes.
Quality Distributor
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