Overview
The LE33CD-TR from STMicroelectronics is a low-dropout voltage regulator (LDO) designed to provide a stable and efficient power supply solution. This component is part of the LEXX series, known for its very low dropout voltage and low quiescent current. The LE33CD-TR is particularly suited for applications requiring a fixed 3.3V output voltage and is available in an SOIC-8 package. It is pin-to-pin compatible with the L78L series and features a shutdown logic control, making it ideal for local regulation and power management in various electronic systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Manufacturer | STMicroelectronics | |
| Part Number | LE33CD-TR | |
| Package | SOIC-8 | |
| Output Type | Fixed | |
| Output Voltage | 3.3V | |
| Output Configuration | Positive electrode | |
| Number of Outputs | 1 | |
| Operating Input Voltage | Up to 18V | |
| Output Current Limit | 150 mA | |
| Quiescent Current (ON mode) | 0.5 to 1 mA | |
| Quiescent Current (OFF mode) | 50 to 100 µA | |
| Dropout Voltage | 0.2 to 0.4 V | |
| Line Regulation | 3 to 20 mV | |
| Load Regulation | 3 to 25 mV | |
| Supply Voltage Rejection | 80 dB at 120 Hz, 75 dB at 1 kHz, 60 dB at 10 kHz | |
| Output Noise Voltage | 50 µV (10 Hz to 100 kHz) | |
| Operating Junction Temperature Range | -40 to 125 °C | |
| Storage Temperature Range | -65 to 150 °C |
Key Features
- Low Dropout Voltage: The LE33CD-TR features a very low dropout voltage of 0.2 to 0.4 V, ensuring efficient power supply even at low input voltages.
- Low Quiescent Current: The device has a low quiescent current of 0.5 to 1 mA in ON mode and 50 to 100 µA in OFF mode, which helps in reducing overall power consumption.
- Shutdown Logic Control: The SOIC-8 package includes a shutdown logic control (pin 5, TTL compatible), allowing for part of the board to be put in standby mode, further reducing power consumption.
- High Accuracy Output Voltage: The output voltage is highly accurate, with a typical value of 3.3V and minimal line and load regulation.
- Compact Package: Available in an SOIC-8 package, making it suitable for space-constrained designs.
- Pin-to-Pin Compatibility: Compatible with the L78L series, making it easy to integrate into existing designs.
Applications
- Local Power Regulation: Ideal for local regulation in complex electronic systems where a stable and efficient power supply is required.
- Portable Electronics: Suitable for battery-powered devices due to its low quiescent current and low dropout voltage.
- Industrial Automation: Used in industrial control systems where reliable and efficient power supply is critical.
- Consumer Electronics: Applicable in various consumer electronic devices requiring stable and efficient power management.
- Automotive Systems: Can be used in automotive systems where robust and efficient power supply is necessary.
Q & A
- What is the output voltage of the LE33CD-TR?
The output voltage of the LE33CD-TR is 3.3V.
- What is the maximum input voltage for the LE33CD-TR?
The maximum input voltage for the LE33CD-TR is 18V.
- What is the typical quiescent current in ON mode?
The typical quiescent current in ON mode is 0.5 to 1 mA.
- Does the LE33CD-TR have a shutdown feature?
Yes, the LE33CD-TR in the SOIC-8 package includes a shutdown logic control.
- What is the dropout voltage of the LE33CD-TR?
The dropout voltage of the LE33CD-TR is 0.2 to 0.4 V.
- What is the operating junction temperature range for the LE33CD-TR?
The operating junction temperature range is -40 to 125 °C.
- Is the LE33CD-TR RoHS compliant?
Yes, the LE33CD-TR is RoHS compliant.
- What is the typical line regulation of the LE33CD-TR?
The typical line regulation is 3 to 20 mV.
- What is the output noise voltage of the LE33CD-TR?
The output noise voltage is 50 µV (10 Hz to 100 kHz).
- What package types are available for the LE33CD-TR?
The LE33CD-TR is available in an SOIC-8 package.
