Overview
The LD1117V33C-DG, produced by STMicroelectronics, is a low drop voltage regulator designed to provide a stable output voltage with high efficiency. This regulator is part of the LD1117 series, which offers both fixed and adjustable output voltage options. The LD1117V33C-DG specifically provides a fixed output voltage of 3.3V and is capable of delivering up to 800 mA of output current. It is available in various packages, including TO-220, SOT-223, DPAK, and SO-8, each optimized for thermal performance and space efficiency.
Key Specifications
| Attribute | Value |
|---|---|
| Input Voltage - Max | 15 V |
| Output Voltage - Fixed | 3.3 V |
| Dropout Voltage - Max | 1.2 V |
| Output Current - Max | 800 mA |
| Tolerance (%) | ±2% |
| Operating Temperature Range | -40°C to +125°C |
| Regulator Topology | Fixed |
| Quiescent Current | 5 mA |
| No. of Outputs | Single |
| Output Noise | 100 µV |
| Load Regulation | 1 mV |
| Line Regulation | 1 mV |
| Package Style | TO-220-3 (TO-220AB) |
| Mounting Method | Through Hole |
Key Features
- Low dropout voltage (1 V typ.)
- Output current up to 800 mA
- Fixed output voltage options: 1.2 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V
- Adjustable version available (VREF = 1.25 V)
- Internal current and thermal limit
- Tight output voltage tolerance: ±1% at 25°C and ±2% over full temperature range
- Supply voltage rejection: 75 dB (typ.)
- Available in SOT-223, DPAK, SO-8, and TO-220 packages
- High efficiency due to NPN pass transistor
- Minimum 10 μF capacitor required for stability
Applications
The LD1117V33C-DG is suitable for a variety of applications requiring stable and efficient voltage regulation. Some key applications include:
- Power supplies for electronic devices
- Active termination for SCSI-2 lines (especially the 2.85 V version)
- Embedded systems and microcontrollers
- Industrial control systems
- Automotive electronics
Q & A
- What is the maximum output current of the LD1117V33C-DG?
The maximum output current is up to 800 mA.
- What are the available output voltage options for the LD1117 series?
The fixed output voltage options are 1.2 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V. An adjustable version is also available.
- What is the typical dropout voltage of the LD1117V33C-DG?
The typical dropout voltage is 1 V.
- What are the operating temperature ranges for the LD1117V33C-DG?
The operating temperature range is from -40°C to +125°C.
- What type of pass transistor is used in the LD1117V33C-DG?
The device uses an NPN pass transistor for high efficiency.
- What is the minimum capacitor required for stability?
A minimum 10 μF capacitor is required for stability.
- Is the LD1117V33C-DG RoHS compliant?
- What are the available package styles for the LD1117V33C-DG?
The device is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the quiescent current of the LD1117V33C-DG?
The quiescent current is 5 mA.
- Does the LD1117V33C-DG have internal current and thermal limits?
