Overview
The LP2951CDM-3.3R2G 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 series includes internal current and thermal limiting protection, making it ideal for battery-powered computer, consumer, and industrial equipment where extending the useful battery life is desirable.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin | 4.3 | 30 | V | |
| Output Voltage | VO | 3.234 | 3.300 | 3.366 | V |
| Output Current | IO | 100 | mA | ||
| Quiescent Bias Current | ICC | 93 | 120 | µA | |
| Dropout Voltage | VI - VO | 350 | 450 | mV | |
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | |
| Maximum Die Junction Temperature Range | TJ | 150 | °C | ||
| Storage Temperature Range | Tstg | -65 | 150 | °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.
- Preset Output Voltages: Available in 5.0 V, 3.3 V, and 3.0 V options, or programmable from 1.25 V to 29 V.
- 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 Protection: Ensures device safety and reliability.
- Low Output Noise Voltage: With a 1.0 µF capacitor, the output noise voltage is minimized.
- Requires Only a 1.0 µF Output Capacitor for Stability: Simplifies the design and reduces component count.
Applications
- Battery-Powered Devices: Ideal for extending the useful battery life in portable equipment.
- Consumer Electronics: Suitable for a wide range of consumer electronics requiring low power consumption and efficient voltage regulation.
- Industrial Equipment: Used in industrial applications where reliable and efficient voltage regulation is critical.
- Automotive and Avionics: Applicable in automotive and avionics systems due to its robust specifications and reliability.
- Logistics and Robotics: Used in logistics robot CPU boards and other similar applications requiring stable voltage regulation).
Q & A
- What is the maximum input voltage for the LP2951CDM-3.3R2G?
The maximum input voltage is 30 V).
- What is the typical quiescent bias current of the LP2951CDM-3.3R2G?
The typical quiescent bias current is 75 µA).
- What are the available output voltage options for the LP2951 series?
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 LP2951CDM-3.3R2G have internal protection features?
Yes, it includes internal current and thermal limiting protection).
- What is the purpose of the Error Output feature in the LP2951 series?
The Error Output can signal external circuitry of an out-of-regulation condition or be used as a microprocessor power-on reset).
- How does the Shutdown input work on the LP2951CDM-3.3R2G?
The Shutdown input allows a logic level signal to turn-off or turn-on the regulator output).
- What is the operating ambient temperature range for the LP2951CDM-3.3R2G?
The operating ambient temperature range is from -40°C to 125°C).
- What is the maximum die junction temperature for the LP2951CDM-3.3R2G?
The maximum die junction temperature is 150°C).
- What type of capacitor is required for stability, and what is its value?
A 1.0 µF output capacitor is required for stability).
- In what types of applications is the LP2951CDM-3.3R2G commonly used?
It is commonly used in battery-powered devices, consumer electronics, industrial equipment, automotive, and avionics systems).
