Overview
The STMicroelectronics LE33CD-TR is a very low-dropout voltage regulator designed for low-noise, low-power applications and battery-powered systems. This regulator is part of the LEXX series, known for its high performance and efficiency. With a very low dropout voltage of 0.2 V and a low quiescent current, it is particularly suitable for applications where power consumption needs to be minimized.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 3.234 | 3.3 | 3.366 | V |
| Operating Input Voltage (VI) | - | - | 18 | V |
| Output Current Limit (IO) | - | - | 150 mA | mA |
| Line Regulation (∆VO) | - | - | 20 mV | mV |
| Load Regulation (∆VO) | - | - | 25 mV | mV |
| Quiescent Current (Id) - ON Mode | 0.5 mA | 1 mA | 3 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) | - | - | 80 dB (typ.) | dB |
| Operating Junction Temperature Range (TOP) | -40 °C | - | 125 °C | °C |
| Output Bypass Capacitance (CO) | 2.2 µF | - | 10 µF | µF |
Key Features
- Very Low Dropout Voltage: 0.2 V typical, making it suitable for low-noise and low-power applications.
- Low Quiescent Current: 0.5 mA in ON mode and 50 µA in OFF mode, reducing power consumption.
- High Accuracy: Output voltage accuracy of ±2% at 25 °C.
- Internal Current and Thermal Limit: Protects the device from overcurrent and overheating.
- Shutdown Logic Control: Available in the 8-pin SO-8 package, allowing part of the board to be put in standby mode.
- Small Capacitor Requirement: Requires a small 2.2 µF capacitor for stability, reducing component size and cost.
- Wide Temperature Range: Operating junction temperature range from -40 °C to 125 °C.
- High Supply Voltage Rejection: Up to 80 dB, ensuring stable output voltage despite input voltage variations.
Applications
- Battery-Powered Systems: Ideal for devices that require low power consumption and stable voltage regulation.
- Low-Noise Applications: Suitable for audio, medical, and other sensitive electronic systems where noise needs to be minimized.
- Portable Electronics: Used in handheld devices, mobile phones, and other portable electronics where power efficiency is crucial.
- Industrial Automation: Can be used in various industrial control systems that require reliable and efficient voltage regulation.
Q & A
- What is the typical dropout voltage of the LE33CD-TR?
The typical dropout voltage is 0.2 V.
- What is the maximum output current of the LE33CD-TR?
The maximum output current is internally limited to 150 mA.
- What is the operating input voltage range for the LE33CD-TR?
The operating input voltage range is up to 18 V.
- What is the quiescent current in ON mode for the LE33CD-TR?
The quiescent current in ON mode is typically 0.5 mA.
- Does the LE33CD-TR have a shutdown logic control feature?
- What is the required output bypass capacitance for the LE33CD-TR?
The required output bypass capacitance is 2.2 µF.
- What is the operating junction temperature range for the LE33CD-TR?
The operating junction temperature range is from -40 °C to 125 °C.
- How accurate is the output voltage of the LE33CD-TR?
The output voltage accuracy is ±2% at 25 °C.
- Does the LE33CD-TR have internal current and thermal limits?
- What is the supply voltage rejection of the LE33CD-TR?
The supply voltage rejection is up to 80 dB.
