Overview
The LP2951CDMR2G 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. It features a very low quiescent bias current of 75 µA and is capable of supplying output currents in excess of 100 mA. The LP2951 includes internal current and thermal limiting protection, making it suitable for battery-powered devices where extending battery life is crucial.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Current | - | - | 100 mA | - |
| Quiescent Bias Current | - | 75 µA | - | µA |
| Dropout Voltage at 100 mA | 350 | - | 450 | mV |
| Line Regulation (Vin = VO(nom) +1.0 V to 30 V) | -0.08 | 0.20 | % | |
| Load Regulation (IO = 100 µA to 100 mA) | -0.13 | 0.20 | % | |
| Operating Ambient Temperature Range | -40 | - | 125 | °C |
| Maximum Die Junction Temperature Range | - | - | 150 | °C |
| Output Voltage Tolerance (for 'A' suffix devices) | - | - | ±0.5% | - |
Key Features
- Error Output: Signals an out of regulation condition or can be used as a microprocessor power-on reset.
- Output 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 using a resistor divider and direct access to the Error Amplifier feedback input.
- Logic Level Shutdown Input: Allows the regulator output to be turned on or off using a logic level signal.
- Low Quiescent Bias Current: 75 µA, which helps in extending battery life in battery-powered devices.
- Low Dropout Voltage: 50 mV at 100 µA and 380 mV at 100 mA.
- Internal Current and Thermal Limiting: Provides protection against overcurrent and overheating conditions.
- Tight Line and Load Regulation: Ensures stable output voltage under varying input and load conditions.
- Requires Only a 1.0 µF Output Capacitor for Stability.
Applications
- Battery-powered computer equipment
- Consumer electronics
- Industrial equipment
- Automotive systems
- Avionics, such as RADAR systems
- AC Analog Input Modules
- Logistics Robot CPU Boards
- Optical Line Cards
Q & A
- What is the maximum output current of the LP2951CDMR2G?
The LP2951CDMR2G can supply output currents in excess of 100 mA.
- What is the quiescent bias current of the LP2951CDMR2G?
The quiescent bias current is 75 µA.
- What are the available output voltage options for the LP2951CDMR2G?
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 LP2951CDMR2G have internal protection features?
Yes, it includes internal current and thermal limiting protection.
- What is the operating ambient temperature range of the LP2951CDMR2G?
The operating ambient temperature range is from -40°C to +125°C.
- What is the maximum die junction temperature of the LP2951CDMR2G?
The maximum die junction temperature is 150°C.
- What is the purpose of the Error Output feature in the LP2951CDMR2G?
The Error Output can signal an out of regulation condition or be used as a microprocessor power-on reset.
- How can the output voltage of the LP2951CDMR2G be adjusted?
The output voltage can be adjusted using a resistor divider and direct access to the Error Amplifier feedback input.
- What is the significance of the Shutdown input in the LP2951CDMR2G?
The Shutdown input allows the regulator output to be turned on or off using a logic level signal.
- What type of capacitor is required for stability in the LP2951CDMR2G?
Only a 1.0 µF output capacitor is required for stability.
