Specifications
| Attribute | Value |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 30V |
| Voltage - Output (Min/Fixed) | 1.235V (3.3V) |
| Voltage - Output (Max) | 30V |
| Voltage Dropout (Max) | 0.6V @ 100mA |
| Current - Output | 100mA |
| Current - Quiescent (Iq) | 120 µA |
| Current - Supply (Max) | 14 mA |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Overview
Description
The LP2951-33DR is a low-dropout voltage regulator designed for precision voltage regulation applications. Manufactured by Texas Instruments, it provides a fixed output voltage of 3.3 volts with an adjustable version available. Key features include a low dropout voltage of typically 60 mV at light loads and 470 mV at full 100 mA load, making it efficient even in low-voltage scenarios. The device offers high accuracy and stability with a 0.5% output voltage tolerance, ensuring precise performance.
Additional features include a shutdown mode for power conservation, an error flag for indicating output faults, and programmable output current limiting. It is also equipped with thermal overload protection to prevent damage due to excessive heat. The LP2951-33DR comes in a small surface-mount package, making it suitable for compact applications. It is commonly used in battery-powered devices, portable electronics, and any system requiring a stable, efficient power supply. Its combination of low dropout voltage, precision, and protection features makes it a versatile choice for various electronic applications.
Additional features include a shutdown mode for power conservation, an error flag for indicating output faults, and programmable output current limiting. It is also equipped with thermal overload protection to prevent damage due to excessive heat. The LP2951-33DR comes in a small surface-mount package, making it suitable for compact applications. It is commonly used in battery-powered devices, portable electronics, and any system requiring a stable, efficient power supply. Its combination of low dropout voltage, precision, and protection features makes it a versatile choice for various electronic applications.
Equivalent
The LP2951-33DR is a low-dropout (LDO) voltage regulator. Equivalent products may include:
1. Microchip's MCP1703A-3302E/TO
2. ON Semiconductor's NCP1117ST33T3G
3. Analog Devices' ADM7170ACPZ-3.3-R7
4. Texas Instruments' TLV755P33PDBVR
5. STMicroelectronics' LD1117S33TR
Ensure the specific requirements such as voltage, current, package type, and pin compatibility are verified for your application.
1. Microchip's MCP1703A-3302E/TO
2. ON Semiconductor's NCP1117ST33T3G
3. Analog Devices' ADM7170ACPZ-3.3-R7
4. Texas Instruments' TLV755P33PDBVR
5. STMicroelectronics' LD1117S33TR
Ensure the specific requirements such as voltage, current, package type, and pin compatibility are verified for your application.
Features
The LP2951-33DR is a low-dropout voltage regulator designed for a range of power management applications. Key features include a 3.3V fixed output voltage and an input voltage range of up to 30V. It offers a low quiescent current of approximately 75 µA, making it suitable for battery-powered devices. The regulator includes an error flag that indicates an output voltage drop-out condition and a shutdown feature for power conservation. It also provides thermal and short-circuit protection to ensure reliable operation under various conditions. The dropout voltage is typically 380 mV at a 100 mA load, which is beneficial for maximizing battery life.
The device comes in a surface-mount package, specifically the SOIC-8, facilitating compact designs. Additionally, the LP2951-33DR supports an adjustable output voltage version to accommodate different application requirements. Its stability with low ESR capacitors makes it versatile for various electronic projects. This regulator is widely used in automotive, industrial, and consumer electronics due to its robustness and efficiency.
The device comes in a surface-mount package, specifically the SOIC-8, facilitating compact designs. Additionally, the LP2951-33DR supports an adjustable output voltage version to accommodate different application requirements. Its stability with low ESR capacitors makes it versatile for various electronic projects. This regulator is widely used in automotive, industrial, and consumer electronics due to its robustness and efficiency.
Pinout
The LP2951-33DR is a low-dropout voltage regulator with an 8-pin configuration in a SOIC-8 package. It is designed to provide a 3.3V output. Here are the pin functions:
1. VOUT: Output voltage pin where the regulated 3.3V is provided.
2. GND: Ground pin, connected to the circuit's ground reference.
3. VIN: Input voltage pin where the unregulated input voltage is applied.
4. NC (No Connect): Not internally connected, often left unconnected.
5. SHUTDOWN: Pin used to enable or disable the regulator output (active low).
6. FEEDBACK: For setting the output voltage and connecting to the internal voltage divider (if not using the fixed output version).
7. BYPASS: Bypass pin for connecting an external capacitor to improve noise performance.
8. ERROR: Error flag output that indicates output voltage is out of regulation.
The LP2951-33DR is commonly used in battery-powered applications due to its low dropout voltage and low quiescent current.
1. VOUT: Output voltage pin where the regulated 3.3V is provided.
2. GND: Ground pin, connected to the circuit's ground reference.
3. VIN: Input voltage pin where the unregulated input voltage is applied.
4. NC (No Connect): Not internally connected, often left unconnected.
5. SHUTDOWN: Pin used to enable or disable the regulator output (active low).
6. FEEDBACK: For setting the output voltage and connecting to the internal voltage divider (if not using the fixed output version).
7. BYPASS: Bypass pin for connecting an external capacitor to improve noise performance.
8. ERROR: Error flag output that indicates output voltage is out of regulation.
The LP2951-33DR is commonly used in battery-powered applications due to its low dropout voltage and low quiescent current.
Manufacturer
The LP2951-33DR is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company known for designing and producing a wide variety of integrated circuits and electronic components. The company is headquartered in Dallas, Texas, and is recognized for its innovation and substantial contributions to the electronics industry. TI's product portfolio includes analog chips, digital signal processors, microcontrollers, and more, serving various sectors such as automotive, industrial, consumer electronics, and communications.
Application
The LP2951-33DR is a low-dropout (LDO) voltage regulator commonly used in applications requiring efficient linear voltage regulation. Its key application areas include battery-powered devices, where its low quiescent current extends battery life. It's suitable for microprocessor power supplies, as it provides a stable output voltage essential for processor operation. It is also used in portable electronics, such as smartphones and tablets, for reliable voltage regulation. Additionally, the LP2951-33DR is employed in automotive electronics for low-noise power supply circuits, and in industrial automation systems for precise voltage regulation. Its small form factor and thermal protection features make it versatile for diverse applications.
Package
The LP2951-33DR is a low-dropout voltage regulator available in an SOIC-8 (Small Outline Integrated Circuit) package.
