Overview
The STMicroelectronics LE33CZ-TR is a very low-dropout voltage regulator, part of the LE00 regulator series. This device is designed to provide a stable 3.3V output voltage and is particularly suitable for low-noise, low-power applications and battery-powered systems. The LE33CZ-TR is available in a 3-pin TO-92 package and is pin-to-pin compatible with the L78L series. It features a very low dropout voltage of 0.2V and low quiescent current, making it ideal for applications where power efficiency is crucial.
Key Specifications
| Parameter | Value |
|---|---|
| Brand | STMicroelectronics |
| Maximum Output Current | 100mA |
| Regulator Type | Low Dropout Voltage |
| Number of Outputs | 1 |
| Output Voltage | 3.3 V |
| Line Regulation | 20 mV |
| Load Regulation | 25 mV |
| Accuracy | ±2% |
| Mounting Type | Through Hole |
| Polarity | Positive |
| Quiescent Current | 1.5mA |
| Package Type | TO-92 |
| Pin Count | 3 |
| Output Type | Fixed |
| Dimensions | 4.95 x 3.94 x 4.95mm |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +125 °C |
| Maximum Input Voltage | 18 V |
| Dropout Voltage | 0.2 V (typical) |
Key Features
- Very Low Dropout Voltage: 0.2V typical, making it suitable for low-noise and low-power applications.
- Low Quiescent Current: 0.5mA in ON mode and 50µA in OFF mode, no load.
- Internal Current and Thermal Limit: Built-in protection against overcurrent and overheating.
- Small Capacitor Requirement: Requires a 2.2µF capacitor for stability, reducing component size and cost.
- High Supply Voltage Rejection: Up to 80dB, ensuring minimal noise from the input supply.
- Shutdown Logic Control (in SO-8 package): Allows part of the board to be put in standby, reducing total power consumption.
- Precision Output Voltage: Available in ±2% selection at 25°C.
Applications
- Power Management: Ideal for managing power in low-noise and low-power systems.
- Battery-Powered Systems: Suitable for battery-powered devices due to its low quiescent current and low dropout voltage.
- Local Voltage Regulation: Can be used as a local regulator to reduce power consumption in specific parts of a board.
Q & A
- What is the output voltage of the LE33CZ-TR?
The output voltage of the LE33CZ-TR is 3.3V.
- What is the maximum output current of the LE33CZ-TR?
The maximum output current is 100mA.
- What is the typical dropout voltage of the LE33CZ-TR?
The typical dropout voltage is 0.2V.
- What is the quiescent current of the LE33CZ-TR in ON mode?
The quiescent current in ON mode is 0.5mA.
- What package type is the LE33CZ-TR available in?
The LE33CZ-TR is available in a 3-pin TO-92 package.
- What is the operating temperature range of the LE33CZ-TR?
The operating temperature range is from -40°C to +125°C.
- Does the LE33CZ-TR have built-in protection features?
Yes, it has internal current and thermal limits for protection.
- What is the supply voltage rejection of the LE33CZ-TR?
The supply voltage rejection is up to 80dB.
- Is the LE33CZ-TR suitable for battery-powered systems?
Yes, it is suitable due to its low quiescent current and low dropout voltage.
- Does the LE33CZ-TR require any external components for stability?
Yes, it requires a 2.2µF capacitor for stability.
