Overview
The LP2951CDR2G is a micropower low dropout (LDO) linear voltage regulator produced by onsemi. 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 can supply output currents in excess of 100 mA. The LP2951CDR2G includes internal current and thermal limiting protection, making it suitable for battery-powered devices where extending battery life is crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 100 mA | mA |
| Quiescent Bias Current | 75 µA | µA |
| Input Voltage Range | 2.3 V to 30 V | V |
| Output Voltage Range | 1.25 V to 29 V (programmable), 3.0 V, 3.3 V, 5.0 V (fixed) | V |
| Dropout Voltage | 50 mV at 100 µA, 380 mV at 100 mA | mV |
| Line Regulation | 0.04% to 0.10% | % |
| Load Regulation | 0.05% to 0.10% | % |
| Output Noise Voltage | 126 µVrms (10 Hz to 100 kHz) | µVrms |
| Operating Ambient Temperature Range | -40°C to +125°C | °C |
| Package Type | SOIC-8 |
Key Features
- Error Output: Signals an out of regulation condition or can be used as a microprocessor power-on reset.
- Output Programmable: From 1.25 V to 29 V, or preset to 3.0 V, 3.3 V, or 5.0 V.
- Logic Level Shutdown Input: Allows a logic level signal to turn-off or turn-on the regulator output.
- Low Quiescent Bias Current: 75 µA.
- Low Dropout Voltage: 50 mV at 100 µA and 380 mV at 100 mA.
- Internal Current and Thermal Limiting Protection.
- Extremely Tight Line and Load Regulation.
- Requires Only a 1.0 µF Output Capacitor for Stability.
Applications
- Battery-powered computer equipment.
- Consumer electronics.
- Industrial equipment.
- Automotive applications.
- 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 LP2951CDR2G? The LP2951CDR2G can supply output currents in excess of 100 mA.
- What is the quiescent bias current of the LP2951CDR2G? The quiescent bias current is 75 µA.
- What is the input voltage range for the LP2951CDR2G? The input voltage range is from 2.3 V to 30 V.
- Can the output voltage of the LP2951CDR2G be programmed? Yes, the output voltage can be programmed from 1.25 V to 29 V, or preset to 3.0 V, 3.3 V, or 5.0 V.
- What protection features does the LP2951CDR2G have? It includes internal current and thermal limiting protection.
- What is the dropout voltage of the LP2951CDR2G? The dropout voltage is 50 mV at 100 µA and 380 mV at 100 mA.
- What is the operating ambient temperature range for the LP2951CDR2G? The operating ambient temperature range is -40°C to +125°C.
- What package type is the LP2951CDR2G available in? The LP2951CDR2G is available in the SOIC-8 package.
- Does the LP2951CDR2G have a shutdown feature? Yes, it has a logic level shutdown input that allows turning the regulator output on or off.
- What is the purpose of the Error Output feature in the LP2951CDR2G? The Error Output can signal an out of regulation condition or be used as a microprocessor power-on reset.
