Overview
The LDL1117S25R, 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.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 V to 18 V | V |
| Output Voltage (nominal) | 2.5 V | V |
| Output Current (nominal) | 1.2 A | A |
| Typical Dropout Voltage | 350 mV @ 1.2 A | mV |
| Power Supply Rejection Ratio (PSRR) | 87 dB @ 120 Hz | dB |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package | SOT-223 | |
| RoHS Compliance Grade | Ecopack2 |
Key Features
- Input voltage range from 2.5 V to 18 V
- Guaranteed output current of 1.2 A
- Typical dropout voltage of 350 mV @ 1.2 A
- High PSRR of 87 dB @ 120 Hz
- Internal thermal, current, and power limitation protections
- Operating temperature range: -40 °C to 125 °C
- Available in SOT-223 package
- RoHS compliant (Ecopack2)
Applications
- Consumer electronics
- Industrial systems
- SMPS (Switch-Mode Power Supplies)
- DC-DC converter post-regulation
- Motherboard point-of-load (P.O.L.) regulation
Q & A
- What is the maximum output current of the LDL1117S25R?
The maximum output current is 1.2 A. - What is the typical dropout voltage of the LDL1117S25R?
The typical dropout voltage is 350 mV @ 1.2 A. - What is the input voltage range for the LDL1117S25R?
The input voltage range is from 2.5 V to 18 V. - What is the PSRR of the LDL1117S25R at 120 Hz?
The PSRR is 87 dB at 120 Hz. - What are the operating temperature limits for the LDL1117S25R?
The operating temperature range is from -40 °C to 125 °C. - What type of package is the LDL1117S25R available in?
The LDL1117S25R is available in the SOT-223 package. - Is the LDL1117S25R RoHS compliant?
Yes, the LDL1117S25R is RoHS compliant with an Ecopack2 grade. - What protections does the LDL1117S25R have?
The device includes internal thermal, current, and power limitation protections. - What are some common applications for the LDL1117S25R?
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 LDL1117S25R?
The device requires an input capacitor of at least 1 μF and an output capacitor with a minimum value of 4.7 μF. Ceramic capacitors with X5R or X7R dielectrics are recommended for stability over the temperature range.
