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LP2951CM
+BOMIC REG LIN POS ADJ 100MA 8-SOIC
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Manufactureronsemi
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Mfr. Part #LP2951CM
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Datasheet LP2951CM DataSheet
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In Stock4780
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Specifications
| Attribute | Value |
| Part Status | Obsolete |
| Base Product Number | LP2951 |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 30V |
| Voltage - Output (Min/Fixed) | 1.26V (5V) |
| Voltage - Output (Max) | 29.4V |
| Voltage Dropout (Max) | 0.6V @ 100mA |
| Current - Output | 100mA |
| Current - Quiescent (Iq) | 140 µA |
| Current - Supply (Max) | 7 mA |
| Control Features | Enable |
| Protection Features | Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC |
| Packaging | Tube |
Overview
Description
Key features include:
- Output voltage options: It can be set to fixed outputs ranging from 2.5V to 5V or adjusted using an external resistor divider.
- Low quiescent current: It typically consumes 75 µA, which helps extend battery life.
- Thermal protection: It includes built-in thermal shutdown to prevent damage from overheating.
- Current limiting: Overcurrent protection ensures the regulator can safely handle short circuits and overload conditions.
- Versatile package: The CM suffix indicates it comes in an 8-pin SOIC package, which is suitable for surface-mount applications.
Overall, the LP2951CM is ideal for portable and compact electronic devices, where space and power efficiency are primary concerns. Its robust protection features and versatility make it reliable for a variety of low-power applications.
Equivalent
1. LM2951 - National Semiconductor/Texas Instruments
2. MIC2951 - Microchip Technology
3. MC33269 - ON Semiconductor
4. REG1117 - Texas Instruments
5. UA78M series - Texas Instruments
These equivalents offer similar functionality with minor variations in specifications like voltage, current output, or package type. It's important to verify compatibility based on your specific application requirements.
Features
1. Low Dropout Voltage: Typically around 60 mV at light loads, making it ideal for battery-operated devices.
2. Output Voltage Options: Provides a fixed output voltage of 5V and adjustable outputs from 1.25V to 29V.
3. Low Quiescent Current: Consumes minimal current (75 µA typical) during no-load conditions, enhancing battery life.
4. Error Flag: Includes an error flag to indicate output voltage drops below a specified threshold.
5. Shutdown Capability: Offers a shutdown feature that reduces power consumption drastically, typically to 1 µA.
6. Protection Features: Includes current and thermal limiting to safeguard against overload conditions.
7. Temperature Range: Designed to operate over a wide temperature range from -40°C to +125°C.
8. Package Options: Available in compact packages, making it suitable for space-constrained applications.
These features make the LP2951CM suitable for a variety of applications, including portable devices, industrial equipment, and automotive systems.
Pinout
1. VOUT (Output): Provides the regulated voltage output.
2. GND (Ground): Ground reference for the regulator.
3. VIN (Input): Input voltage for the regulator.
4. SHDN (Shutdown): Active low input to disable the regulator, reducing the quiescent current.
5. FB (Feedback): Used for setting the output voltage with an external resistor divider.
6. COMP (Compensation): Allows for frequency compensation with an external capacitor.
7. ERROR (Error Output): An open-collector output that indicates when the output voltage is out of regulation.
8. N/C (No Connection): Not connected internally in some versions or can be left floating.
The LP2951CM is designed for battery-powered appliances due to its low quiescent current and is useful in applications requiring precise output voltage regulation.
Manufacturer
Application
1. Battery-Powered Devices: Optimized for low power consumption, it's ideal for extending battery life.
2. Microcontroller Power Supply: Provides stable voltage for microcontrollers and digital circuits.
3. Portable Electronics: Used in smartphones, tablets, and other portable devices requiring compact, efficient power regulation.
4. Industrial Equipment: Suitable for controlling voltage in industrial automation and control systems.
5. Automotive Systems: Ensures reliable voltage regulation in various automotive electronic applications.
Its features like low dropout voltage, adjustable output, and built-in protection make it versatile for a wide range of applications.
Package
Frequently Asked Questions
Q: What are the fixed and adjustable output voltage options for this regulator?
A: It provides an adjustable output from 1.26V to 29.4V, or a fixed 5V output when the adjust pin is connected appropriately.
Q: What is the maximum input voltage supported by the LP2951CM?
A: The maximum input voltage is 30V, making it suitable for high-voltage industrial or automotive applications.
Q: What is the dropout voltage at full load?
A: The maximum dropout voltage is 0.6V at 100mA output current, ensuring efficient low-dropout operation.
Q: Does the LP2951CM include any protection features?
A: Yes, it includes over-temperature shutdown and short-circuit protection for enhanced system reliability.
Q: What is the quiescent current consumption of this device?
A: The typical quiescent current is 140 µA, with a maximum supply current of 7 mA, promoting low-power designs.
Q: Can this regulator be enabled or disabled externally?
A: Yes, it features an Enable control pin for turning the output on or off, useful for power sequencing.
Q: What is the operating temperature range for the LP2951CM?
A: It operates from -40°C to +125°C, suitable for harsh environment applications.
