Overview
The LE45CD-TR is a very low-dropout voltage regulator produced by STMicroelectronics. This device is part of the LEXX series, known for its low-dropout voltage and low quiescent current, making it suitable for low-noise, low-power applications and battery-powered systems. The LE45CD-TR is available in an SO-8 package and offers a range of features that enhance its performance and versatility.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 4.5 V | 4.41 V | 4.59 V | V |
| Operating Input Voltage (VI) | - | - | 18 V | V |
| Output Current Limit (IO) | - | - | 150 mA | mA |
| Line Regulation (∆VO) | - | - | 30 mV | mV |
| Load Regulation (∆VO) | - | - | 25 mV | mV |
| Quiescent Current (Id) - ON Mode | 0.5 mA | - | 1 mA | mA |
| Quiescent Current (Id) - OFF Mode | 50 µA | - | 100 µA | µA |
| Dropout Voltage (Vd) | 0.2 V | - | 0.4 V | V |
| Supply Voltage Rejection (SVR) | 77 dB (at 120 Hz) | - | - | dB |
| Operating Temperature Range | - | -40 °C | 125 °C | °C |
Key Features
- Very Low-Dropout Voltage: Typical dropout voltage of 0.2 V, making it suitable for low-voltage applications.
- Low Quiescent Current: Quiescent current of 0.5 mA in ON mode and 50 µA in OFF mode, ideal for battery-powered systems.
- High Output Current: Output current up to 100 mA.
- Internal Current and Thermal Limit: Built-in current and thermal limiting to protect the device.
- Small Capacitor Requirement: Requires a small 2.2 µF capacitor for stability, reducing component size and cost.
- Precision Output Voltage: Available in ±1% (A) or ±2% (C) selection at 25 °C.
- High Supply Voltage Rejection: Supply voltage rejection of up to 77 dB at 120 Hz.
- Wide Operating Temperature Range: Operating temperature range from -40 °C to 125 °C.
- Inhibit Function: Shutdown logic control (TTL compatible) in the SO-8 package configuration.
Applications
- Low-Power Systems: Ideal for low-power, low-noise applications where minimal voltage drop is crucial.
- Battery-Powered Devices: Suitable for battery-powered systems due to its low quiescent current in OFF mode.
- Portable Electronics: Used in portable electronics where power efficiency and low noise are essential.
- Industrial Control Systems: Can be used in industrial control systems requiring stable and efficient voltage regulation.
- Automotive Electronics: Applicable in automotive electronics where robustness and reliability are key.
Q & A
- What is the typical dropout voltage of the LE45CD-TR?
The typical dropout voltage is 0.2 V.
- What is the maximum output current of the LE45CD-TR?
The maximum output current is 100 mA.
- What is the quiescent current in ON mode for the LE45CD-TR?
The quiescent current in ON mode is typically 0.5 mA.
- What is the quiescent current in OFF mode for the LE45CD-TR?
The quiescent current in OFF mode is typically 50 µA.
- What is the operating temperature range of the LE45CD-TR?
The operating temperature range is from -40 °C to 125 °C.
- Does the LE45CD-TR have an inhibit function?
- What is the supply voltage rejection of the LE45CD-TR at 120 Hz?
The supply voltage rejection at 120 Hz is typically 77 dB.
- What type of capacitor is required for stability, and what is its value?
A 2.2 µF capacitor is required for stability.
- Is the LE45CD-TR pin-to-pin compatible with any other series?
- What are the available output voltage options for the LEXX series?
The LEXX series offers output voltages of 3 V, 3.3 V, 4.5 V, 5 V, and 8 V.
