Overview
The L4931CD33Y, produced by STMicroelectronics, is a very low drop voltage regulator designed for low noise and low power applications. It is particularly suitable for battery-powered systems due to its very low dropout voltage and quiescent current. Available in various packages such as SO-8, DPAK, and TO-92, this regulator offers a range of output voltages, including 3.3V, which is the specific output voltage for the L4931CD33Y model.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (nominal) | 3.3 | V |
| Output Tolerance (typical) | ±1% | |
| Output Current (nominal) | 250 mA | |
| Dropout Voltage | 0.4 V | |
| Quiescent Current (ON mode) | 600 µA | |
| Quiescent Current (OFF mode) | 50 µA | |
| Operating Input Voltage | 4 to 20 V | |
| Operating Temperature Range | -40 to 125 °C | |
| Supply Voltage Rejection (typical for 5V version) | 70 dB | |
| Output Noise Voltage | 50 µV (B = 10 Hz to 100 kHz) | |
| Package | SO-8, DPAK, TO-92 |
Key Features
- Very low dropout voltage (0.4 V)
- Very low quiescent current (Typ. 50 µA in OFF mode, 600 µA in ON mode)
- Output current up to 250 mA
- Logic controlled electronic shutdown
- Internal current and thermal limit
- Only 2.2 µF capacitor required for stability
- Available in ± 1 % (AB) or 2 % (C) selection at 25 °C
- High supply voltage rejection (70 dB typical for 5 V version)
Applications
The L4931CD33Y is suitable for a variety of applications, particularly those requiring low noise and low power consumption. These include:
- Battery-powered systems
- Low power electronic devices
- Industrial control systems
- Automotive electronics
- Portable electronics
Q & A
- What is the typical dropout voltage of the L4931CD33Y?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931CD33Y?
The maximum output current is up to 250 mA.
- What is the quiescent current in ON and OFF modes?
The quiescent current is typically 600 µA in ON mode and 50 µA in OFF mode.
- What is the operating temperature range of the L4931CD33Y?
The operating temperature range is from -40 to 125 °C.
- Does the L4931CD33Y have a shutdown feature?
- What is the required capacitor value for stability?
Only a 2.2 µF capacitor is required for stability.
- What are the available output voltage options for the L4931 series?
The L4931 series offers output voltages of 3.3 V, 3.5 V, and 5 V.
- What is the supply voltage rejection for the 5 V version?
The supply voltage rejection is typically 70 dB for the 5 V version.
- In what packages is the L4931CD33Y available?
The L4931CD33Y is available in SO-8, DPAK, and TO-92 packages.
- Is the L4931CD33Y suitable for battery-powered systems?
