Overview
The LP2951ACDG is a micropower low dropout (LDO) linear voltage regulator produced by ON Semiconductor. It is designed to maintain proper regulation with an extremely low input-to-output voltage differential. This device features a very low quiescent bias current of 75 µA and is capable of supplying output currents in excess of 100 mA. The LP2951ACDG includes internal current and thermal limiting protection, making it ideal for battery-powered systems where extending battery life is crucial.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (5.0 V Versions) | 4.950 | 5.000 | 5.050 | V |
| Output Voltage (3.3 V Versions) | 3.267 | 3.300 | 3.333 | V |
| Output Voltage (3.0 V Versions) | 2.970 | 3.000 | 3.030 | V |
| Output Current | - | - | 100 mA | - |
| Quiescent Bias Current | - | 75 µA | - | - |
| Dropout Voltage (IO = 100 mA) | - | - | 380 mV | - |
| Line Regulation | -0.08 | 0.20 | - | % |
| Load Regulation | -0.13 | 0.20 | - | % |
| Operating Ambient Temperature Range | -40°C | - | +125°C | - |
| Storage Temperature Range | -65°C | - | +150°C | - |
Key Features
- Low Quiescent Bias Current: 75 µA typical, which helps in prolonging battery life in battery-powered systems.
- Low Dropout Voltage: 50 mV at 100 mA and 380 mV at 100 mA, ensuring efficient voltage regulation.
- Output Programmability: 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.
- Error Output: Signals an out-of-regulation condition or can be used as a microprocessor power-on reset.
- Logic Level Shutdown Input: Allows a logic level signal to turn-off or turn-on the regulator output.
- Internal Current and Thermal Limiting: Provides protection against overcurrent and overheating.
- Tight Line and Load Regulation: Ensures high accuracy output voltage with minimal variation under different load and line conditions.
- Low Output Voltage Temperature Coefficient: Maintains stable output voltage across a wide temperature range.
Applications
- Battery-Powered Systems: Ideal for battery-powered computer, consumer, and industrial equipment where extending battery life is desirable.
- Automotive and Avionics: Suitable for automotive and avionics applications, including RADAR systems.
- Industrial Equipment: Used in AC analog input modules, logistics robot CPU boards, and optical line cards.
- Consumer Electronics: Applicable in various consumer electronics requiring low power and high efficiency voltage regulation).
Q & A
- What is the typical quiescent bias current of the LP2951ACDG?
The typical quiescent bias current is 75 µA).
- What is the maximum output current of the LP2951ACDG?
The maximum output current is 100 mA).
- What are the available output voltage options for the LP2951ACDG?
The 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).
- Does the LP2951ACDG have an error output feature?
Yes, it has an error output that signals an out-of-regulation condition or can be used as a microprocessor power-on reset).
- How does the shutdown feature work on the LP2951ACDG?
The shutdown feature allows a logic level signal to turn-off or turn-on the regulator output).
- What kind of protection does the LP2951ACDG have?
The device has internal current and thermal limiting protection).
- What is the operating ambient temperature range of the LP2951ACDG?
The operating ambient temperature range is from -40°C to +125°C).
- Is the LP2951ACDG suitable for automotive applications?
Yes, it is suitable for automotive and other applications requiring unique site and control change requirements, and it is AEC-Q100 qualified).
- What is the storage temperature range for the LP2951ACDG?
The storage temperature range is from -65°C to +150°C).
- Does the LP2951ACDG require any special capacitors for stability?
No, it requires only a 1.0 µF output capacitor for stability).
