Overview
The LP2951ACDR2 is a micropower voltage regulator produced by onsemi, designed to maintain proper regulation with an extremely low input-to-output voltage differential. This device is part of the LP2951 series, which is specifically tailored for battery-powered computer, consumer, and industrial equipment where extending the useful battery life is crucial. The LP2951ACDR2 features a low quiescent bias current of 75 μA and can supply output currents in excess of 100 mA. It is available in the SOIC-8 surface mount package and includes several key features such as an Error Output, programmable output voltage, and a Shutdown input.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 3.0 V, 3.3 V, 5.0 V, or Adjustable | V |
| Output Current | Up to 100 mA | mA |
| Quiescent Bias Current | 75 μA | μA |
| Input-to-Output Voltage Differential | 50 mV at 100 μA, 380 mV at 100 mA | mV |
| Operating Ambient Temperature Range | −40°C to +125°C | °C |
| Output Voltage Tolerance (for 'A' suffix devices) | ±0.5% | % |
| Package Type | SOIC-8 |
Key Features
- Low Quiescent Bias Current of 75 μA
- Low Input-to-Output Voltage Differential of 50 mV at 100 μA and 380 mV at 100 mA
- Output voltage options: 3.0 V, 3.3 V, 5.0 V, or programmable from 1.25 V to 29 V
- Extremely tight line and load regulation
- Requires only a 1.0 μF output capacitor for stability
- Internal current and thermal limiting protection
- Error Output for signaling out-of-regulation conditions or as a microprocessor power-on reset
- Shutdown input for turning the regulator output on or off using a logic level signal
Applications
The LP2951ACDR2 is ideally suited for battery-powered equipment, including computers, consumer electronics, and industrial devices. Its low quiescent bias current and low input-to-output voltage differential make it particularly useful for applications where extending battery life is essential. Typical application circuits include those requiring stable voltage regulation with minimal power consumption.
Q & A
- What is the maximum output current of the LP2951ACDR2?
The LP2951ACDR2 can supply output currents in excess of 100 mA.
- What are the available output voltage options for the LP2951ACDR2?
The output voltage can be preset to 3.0 V, 3.3 V, or 5.0 V, or it can be programmed from 1.25 V to 29 V.
- What is the quiescent bias current of the LP2951ACDR2?
The quiescent bias current is 75 μA.
- What is the input-to-output voltage differential of the LP2951ACDR2?
The input-to-output voltage differential is 50 mV at 100 μA and 380 mV at 100 mA.
- What type of package is the LP2951ACDR2 available in?
The LP2951ACDR2 is available in the SOIC-8 surface mount package.
- Does the LP2951ACDR2 have internal protection features?
Yes, it includes internal current and thermal limiting protection.
- What is the purpose of the Error Output feature in the LP2951ACDR2?
The Error Output can be used to signal external circuitry of an out-of-regulation condition or as a microprocessor power-on reset.
- How can the output of the LP2951ACDR2 be turned on or off?
The output can be turned on or off using a logic level signal through the Shutdown input.
- What type of capacitor is required for stability in the LP2951ACDR2?
A 1.0 μF output capacitor is required for stability, though lower capacitance may be sufficient at lower output currents.
- What is the operating ambient temperature range of the LP2951ACDR2?
The operating ambient temperature range is −40°C to +125°C.
