Overview
The L4931CD30 is a very low drop voltage regulator produced by STMicroelectronics. It is available in various packages, including SO-8, DPAK, and TO-92, and offers a range of output voltages. This regulator is particularly suited for low noise, low power applications, especially in battery-powered systems, due to its very low dropout voltage (0.4 V) and very low quiescent current.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 3.234 | 3.3 | 3.366 | V |
| Operating Input Voltage (VI) | - | - | 20 | V |
| Output Current (Iout) | - | - | 250 | mA |
| Quiescent Current (Id) in ON mode | 0.6 | 1 | - | mA |
| Quiescent Current (Id) in OFF mode | 50 | 100 | - | µA |
| Line Regulation (∆VO) | 3 | - | 18 | mV |
| Load Regulation (∆VO) | 3 | - | 18 | mV |
| Supply Voltage Rejection (SVR) | - | 70 | - | dB |
| Temperature Range | -40 | - | 125 | °C |
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 (available in PPAK and SO-8 packages)
- Output voltages: 3.3 V, 3.5 V, 5 V
- 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 typ. for 5 V version)
Applications
The L4931CD30 is ideal for various applications requiring low noise and low power consumption, such as:
- Battery-powered systems
- Portable electronics
- Industrial control systems
- Automotive electronics
- Low power microcontroller and microprocessor systems
Q & A
- What is the typical dropout voltage of the L4931CD30?
The typical dropout voltage is 0.4 V.
- What are the available output voltages for the L4931CD30?
The available output voltages are 3.3 V, 3.5 V, and 5 V.
- What is the maximum output current of the L4931CD30?
The maximum output current is up to 250 mA.
- Does the L4931CD30 have a shutdown feature?
- What is the quiescent current in OFF mode?
The quiescent current in OFF mode is typically 50 µA.
- What is the temperature range of the L4931CD30?
The temperature range is from -40 to 125 °C.
- How much capacitance is required for stability?
Only a 2.2 µF capacitor is required for stability.
- What is the supply voltage rejection for the 5 V version?
The supply voltage rejection is typically 70 dB for the 5 V version.
- What are the package options for the L4931CD30?
The package options include SO-8, DPAK, and TO-92.
- Is the L4931CD30 suitable for battery-powered systems?
