Overview
The LDL1117S30R, produced by STMicroelectronics, is a 1.2 A high PSRR (Power Supply Rejection Ratio) low-dropout linear voltage regulator. This device is designed to provide a stable output voltage with a high degree of noise rejection, making it suitable for various applications including consumer electronics, industrial systems, SMPS (Switch-Mode Power Supplies), and DC-DC converter post-regulation.
The LDL1117S30R operates with an input voltage range from 2.5 V to 18 V and offers a fixed output voltage of 3 V. It features a typical dropout voltage of 350 mV at 1.2 A and includes internal thermal, current, and power limitation protections to ensure safe operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 to 18 | V |
| Output Voltage (nominal) | 3 | V |
| Output Current (nominal) | 1.2 | A |
| Typical Dropout Voltage @ 1.2 A | 350 | mV |
| Power Supply Rejection Ratio (PSRR) @ 120 Hz | 87 | dB |
| Operating Temperature Range | -40 to 125 | °C |
| Package | SOT-223 | |
| Grade | Industrial | |
| RoHS Compliance Grade | Ecopack2 |
Key Features
- Input voltage range from 2.5 V to 18 V
- Fixed output voltages available: 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5.0 V (other options available on request)
- Guaranteed output current of 1.2 A
- Typical dropout voltage of 350 mV @ 1.2 A
- Internal thermal, current, and power limitation protections
- High PSRR of 87 dB @ 120 Hz
- Operating temperature range: -40 °C to 125°C
- Package: SOT-223
Applications
- Consumer electronics
- Industrial systems
- Switch-Mode Power Supplies (SMPS)
- DC-DC converter post-regulation
- Motherboard Point of Load (P.O.L.) regulation
Q & A
- What is the maximum output current of the LDL1117S30R?
The maximum output current of the LDL1117S30R is 1.2 A.
- What is the input voltage range for the LDL1117S30R?
The input voltage range for the LDL1117S30R is from 2.5 V to 18 V.
- What is the typical dropout voltage of the LDL1117S30R at 1.2 A?
The typical dropout voltage of the LDL1117S30R at 1.2 A is 350 mV.
- What is the PSRR of the LDL1117S30R at 120 Hz?
The PSRR of the LDL1117S30R at 120 Hz is 87 dB.
- What are the operating temperature ranges for the LDL1117S30R?
The operating temperature range for the LDL1117S30R is from -40 °C to 125°C.
- What package type is the LDL1117S30R available in?
The LDL1117S30R is available in the SOT-223 package.
- Does the LDL1117S30R have built-in protection features?
Yes, the LDL1117S30R includes internal thermal, current, and power limitation protections.
- What are some common applications for the LDL1117S30R?
Common applications include consumer electronics, industrial systems, SMPS, DC-DC converter post-regulation, and motherboard P.O.L. regulation.
- How should the input and output capacitors be selected for the LDL1117S30R?
The LDL1117S30R requires external capacitors for stability. Good quality ceramic capacitors such as X5R and X7R are recommended, and they should be placed close to the respective pins.
- Is the LDL1117S30R RoHS compliant?
Yes, the LDL1117S30R is RoHS compliant with an Ecopack2 grade.
