Overview
The LP2951ACD-3.3R is a micropower low dropout (LDO) linear voltage regulator produced by onsemi. This device is designed to maintain proper regulation with an extremely low input-to-output voltage differential, making it ideal for battery-powered devices where extending battery life is crucial. The LP2951 series features a very low quiescent bias current of 75 µA and can supply output currents in excess of 100 mA. It is available in an 8-pin SOIC package, which is suitable for a variety of applications requiring compact and efficient voltage regulation.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.3 V Version) | VO | 3.260 | 3.300 | 3.340 | V |
| Input Voltage Range | Vin | 4.3 | - | 30 | V |
| Output Current | IO | - | - | 100 | mA |
| Quiescent Current | Iq | - | 75 | - | µA |
| Dropout Voltage (at 100 mA) | Vdo | - | 50 | - | mV |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Package Type | - | - | - | 8-pin SOIC | - |
Key Features
- Low Dropout Voltage: 50 mV at 100 mA, ensuring efficient voltage regulation.
- Low Quiescent Current: 75 µA, which helps in extending battery life in portable devices.
- Internal Current and Thermal Limiting: Provides protection against overcurrent and overheating conditions.
- Errorbar Output: Signals an out-of-regulation condition or can be used as a microprocessor power-on reset.
- Programmable Output Voltage: Can be preset to 5.0 V, 3.3 V, or 3.0 V, or programmed from 1.25 V to 29 V.
- Logic Level Shutdown Input: Allows the regulator output to be turned on or off using a logic level signal.
- Tight Line and Load Regulation: Ensures stable output voltage under varying input and load conditions.
- Compact Package: Available in an 8-pin SOIC package, suitable for space-constrained applications.
Applications
- Battery-Powered Devices: Ideal for extending battery life in portable electronics.
- Consumer Electronics: Suitable for use in various consumer devices requiring low power consumption.
- Industrial Equipment: Used in industrial applications where low dropout voltage and low quiescent current are beneficial.
- Automotive Systems: Although not AEC-Q100 qualified, it can be used in non-automotive specific applications within vehicles.
- Logistics and Robotics: Can be used in CPU boards and other control systems in logistics robots.
- Optical Line Cards: Suitable for use in optical communication systems.
Q & A
- What is the output voltage range of the LP2951ACD-3.3R?
The output voltage for the LP2951ACD-3.3R is 3.3 V, with a tolerance of +/- 0.5% for 'A' suffix devices.
- What is the maximum output current of the LP2951ACD-3.3R?
The maximum output current is 100 mA.
- What is the quiescent current of the LP2951ACD-3.3R?
The quiescent current is typically 75 µA.
- What is the dropout voltage of the LP2951ACD-3.3R at 100 mA?
The dropout voltage at 100 mA is 50 mV.
- What is the operating temperature range of the LP2951ACD-3.3R?
The operating ambient temperature range is -40°C to +125°C.
- Does the LP2951ACD-3.3R have internal protection features?
Yes, it has internal current and thermal limiting protection.
- Can the output voltage of the LP2951ACD-3.3R be programmed?
Yes, the output voltage can be programmed from 1.25 V to 29 V using a resistor divider and access to the Error Amplifier feedback input.
- What is the purpose of the Errorbar Output in the LP2951ACD-3.3R?
The Errorbar Output can signal an out-of-regulation condition or be used as a microprocessor power-on reset.
- Does the LP2951ACD-3.3R have a shutdown feature?
Yes, it has a logic level shutdown input that allows the regulator output to be turned on or off.
- In what package is the LP2951ACD-3.3R available?
The LP2951ACD-3.3R is available in an 8-pin SOIC package.
