Overview
The LD1117V33-DG, produced by STMicroelectronics, is a low drop-out linear voltage regulator designed to provide a stable output voltage of 3.3V with a maximum output current of up to 800 mA. This regulator is part of the LD1117 series, which is known for its low dropout voltage and high efficiency. The LD1117V33-DG is available in various packages, including TO-220, SOT-223, DPAK, and SO-8, making it versatile for different application needs.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 3.3 V | 3.267 V | 3.333 V | V |
| Input Voltage Range (Vin) | - | 4.5 V | 15 V | V |
| Output Current (IO) | 800 mA | 800 mA | 1300 mA (surge) | mA |
| Quiescent Current (Id) | 5 mA | 5 mA | 10 mA | mA |
| Dropout Voltage (Vd) | 1 V | 1 V | 1.2 V | V |
| Line Regulation (∆VO) | 1 mV | 1 mV | 6 mV | mV |
| Load Regulation (∆VO) | 1 mV | 1 mV | 10 mV | mV |
| Supply Voltage Rejection (SVR) | 75 dB | 60 dB | 75 dB | dB |
| Output Noise Voltage (eN) | 100 µV | - | - | µV |
| Package Type | TO-220 | - | - | - |
Key Features
- Low dropout voltage (1 V typical)
- Output current up to 800 mA with a peak surge capability of 1.3 A
- Fixed output voltage of 3.3 V with ±2% tolerance over the full temperature range
- Internal current and thermal limiting for protection
- High supply voltage rejection (75 dB typical)
- Low output noise voltage (100 µV typical)
- Available in various packages including TO-220, SOT-223, DPAK, and SO-8
- Requires a minimum 10 µF capacitor for stability
Applications
The LD1117V33-DG is suitable for a wide range of applications requiring a stable 3.3V power supply. These include:
- Embedded systems and microcontrollers
- Industrial control systems
- Consumer electronics
- Telecommunication devices
- SCSI-2 active termination due to its 2.85 V device performance
Q & A
- What is the output voltage of the LD1117V33-DG?
The output voltage is 3.3 V with a ±2% tolerance. - What is the maximum output current of the LD1117V33-DG?
The maximum output current is up to 800 mA with a peak surge capability of 1.3 A. - What is the input voltage range for the LD1117V33-DG?
The input voltage range is from 4.5 V to 15 V. - What is the typical dropout voltage of the LD1117V33-DG?
The typical dropout voltage is 1 V. - Does the LD1117V33-DG have built-in protection features?
Yes, it has internal current and thermal limiting for protection. - What type of packages is the LD1117V33-DG available in?
It is available in TO-220, SOT-223, DPAK, and SO-8 packages. - What is the supply voltage rejection of the LD1117V33-DG?
The supply voltage rejection is 75 dB typical. - What is the output noise voltage of the LD1117V33-DG?
The output noise voltage is 100 µV typical. - What is the minimum capacitor required for stability?
A minimum 10 µF capacitor is required for stability. - What are some common applications of the LD1117V33-DG?
Common applications include embedded systems, industrial control systems, consumer electronics, and telecommunication devices.
