Overview
The L4931CD33-TRY is a very low drop voltage regulator produced by STMicroelectronics. It is part of the L4931 series, which is known for its very low dropout voltage and low quiescent current, making it suitable for low noise, low power applications, particularly in battery-powered systems. This regulator is available in the SO-8 package and is designed for automotive-grade applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | L4931CD33-TRY | |
| Package | SO-8 | |
| Grade | Automotive | |
| Operating Temperature Range | -40 to 125 | °C |
| Output Voltage (nom) | 3.3 | V |
| Output Tolerance (typ) | ±1% | |
| Output Current (nom) | 250 mA | |
| Dropout Voltage | 0.4 V | |
| Quiescent Current (ON mode) | 600 µA | |
| Quiescent Current (OFF mode) | 50 µA | |
| Supply Voltage Rejection | 70 dB (typ. at 1 kHz) | |
| Internal Current and Thermal Limit | Internally limited | |
| Output Bypass Capacitance | 2.2 µF |
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
- Supply voltage rejection: 70 dB typ. for 5 V version
- Temperature range: from -40 to 125 °C
Applications
The L4931CD33-TRY is particularly suited for low noise, low power applications and is especially useful in battery-powered systems. It is also suitable for industrial and automotive applications where low dropout voltage and low quiescent current are critical.
- Battery-powered systems
- Low power and low noise applications
- Industrial applications
- Automotive applications
Q & A
- What is the typical dropout voltage of the L4931CD33-TRY?
The typical dropout voltage is 0.4 V.
- What is the maximum output current of the L4931CD33-TRY?
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 L4931CD33-TRY?
The operating temperature range is from -40 to 125 °C.
- What type of shutdown control does the L4931CD33-TRY have?
The device has logic controlled electronic shutdown.
- What is the supply voltage rejection of the L4931CD33-TRY?
The supply voltage rejection is typically 70 dB at 1 kHz.
- What is the required output bypass capacitance for stability?
Only 2.2 µF capacitor is required for stability.
- In what packages is the L4931CD33-TRY available?
The L4931CD33-TRY is available in the SO-8 package.
- What are the typical output voltage tolerances for the L4931CD33-TRY?
The output voltage tolerance is ±1% at 25 °C.
- Is the L4931CD33-TRY suitable for automotive applications?
