Overview
The LP2951ACDM-3.0RG 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 equipment where extending battery life is crucial. The LP2951 series features a very low quiescent bias current of 75 µA and can supply output currents up to 100 mA. It also includes internal current and thermal limiting protection for enhanced reliability.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (3.0 V Version) | VO | 2.970 | 3.000 | 3.030 | V |
| Output Voltage Tolerance (A Suffix) | ±0.5% | ||||
| Input Voltage Range | Vin | 4.0 | 30 | V | |
| Output Current | IO | 100 µA | 100 mA | ||
| Quiescent Bias Current | ICC | 75 | µA | ||
| Dropout Voltage (IO = 100 mA) | VI - VO | 350 | 450 | mV | |
| Line Regulation | Regline | -0.04 | 0.10 | % | |
| Load Regulation | Regload | -0.05 | 0.10 | % | |
| Operating Ambient Temperature Range | TA | -40 | 125 | °C |
Key Features
- Low Quiescent Bias Current: 75 µA, which helps in extending battery life in portable devices.
- Low Input-to-Output Voltage Differential: 50 mV at 100 µA and 380 mV at 100 mA, ensuring efficient voltage regulation.
- Programmable Output Voltage: Can be preset to 3.0 V, 3.3 V, or 5.0 V, or programmed from 1.25 V to 29 V using external resistors.
- Error Output: Signals external circuitry of an out-of-regulation condition or can be used as a microprocessor power-on reset.
- 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.
- Stability with Low Capacitance: Requires only a 1.0 µF output capacitor for stability.
Applications
- Battery-Powered Equipment: Ideal for extending the useful life of batteries in portable devices.
- Consumer Electronics: Suitable for use in various consumer electronic devices where low power consumption is critical.
- Industrial Equipment: Used in industrial applications requiring stable and efficient voltage regulation.
- Automotive and Avionics: Applicable in automotive and avionics systems due to its robust features and reliability.
- Logistics and Robotics: Utilized in logistics robot CPU boards and other robotic systems.
- Optical Line Cards: Employed in optical line card applications requiring precise voltage regulation.
Q & A
- What is the typical quiescent bias current of the LP2951ACDM-3.0RG?
The typical quiescent bias current is 75 µA.
- What is the maximum output current of the LP2951ACDM-3.0RG?
The maximum output current is 100 mA.
- What is the input voltage range for the LP2951ACDM-3.0RG?
The input voltage range is from 4.0 V to 30 V.
- What is the dropout voltage at 100 mA for the LP2951ACDM-3.0RG?
The dropout voltage at 100 mA is between 350 mV and 450 mV.
- Does the LP2951ACDM-3.0RG have internal protection features?
Yes, it includes internal current and thermal limiting protection.
- How can the output voltage of the LP2951ACDM-3.0RG be adjusted?
The output voltage can be preset to fixed values or programmed from 1.25 V to 29 V using external resistors.
- What is the purpose of the Error Output feature in the LP2951ACDM-3.0RG?
The Error Output signals external circuitry of an out-of-regulation condition or can be used as a microprocessor power-on reset.
- What is the operating ambient temperature range for the LP2951ACDM-3.0RG?
The operating ambient temperature range is from -40°C to 125°C.
- What type of packages is the LP2951 available in?
The LP2951 is available in eight-pin dual-in-line, SO-8, and Micro-8 surface mount packages.
- What is the minimum output capacitor required for stability?
The minimum output capacitor required for stability is 1.0 µF.
