Overview
The LDL1117S12R, produced by STMicroelectronics, is a high-performance, low-dropout linear voltage regulator. This device is designed to provide a maximum current of 1.2 A with an input voltage range from 2.5 V to 18 V and a typical dropout voltage of 350 mV at 1.2 A. The LDL1117S12R features a high power supply rejection ratio (PSRR) of 87 dB at 120 Hz, making it suitable for direct regulations in Switch-Mode Power Supplies (SMPS) and secondary linear regulations in DC-DC converters. It includes internal thermal, current, and power limitation protections, ensuring robust operation under various conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.5 V to 18 V | V |
| Output Voltage (Nominal) | 1.185 V | V |
| Guaranteed Output Current | 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
- Available on fixed output voltages: 1.2 V (1.185 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 applications
- Switch-Mode Power Supplies (SMPS)
- Motherboard Point of Load (P.O.L.)
- DC-DC post-regulation
Q & A
- What is the maximum output current of the LDL1117S12R?
The maximum output current of the LDL1117S12R is 1.2 A.
- What is the input voltage range for the LDL1117S12R?
The input voltage range for the LDL1117S12R is from 2.5 V to 18 V.
- What is the typical dropout voltage of the LDL1117S12R at 1.2 A?
The typical dropout voltage of the LDL1117S12R at 1.2 A is 350 mV.
- What is the power supply rejection ratio (PSRR) of the LDL1117S12R at 120 Hz?
The PSRR of the LDL1117S12R at 120 Hz is 87 dB.
- What are the internal protections included in the LDL1117S12R?
The LDL1117S12R includes internal thermal, current, and power limitation protections.
- What is the operating temperature range of the LDL1117S12R?
The operating temperature range of the LDL1117S12R is from -40 °C to 125 °C.
- What package type is the LDL1117S12R available in?
The LDL1117S12R is available in the SOT-223 package.
- Is the LDL1117S12R RoHS compliant?
Yes, the LDL1117S12R is RoHS compliant with an Ecopack2 grade.
- What are some common applications for the LDL1117S12R?
The LDL1117S12R is commonly used in consumer electronics, industrial applications, SMPS, motherboard P.O.L., and DC-DC post-regulation.
- How does the thermal protection work in the LDL1117S12R?
The thermal protection in the LDL1117S12R activates when the junction temperature reaches 175 °C, causing the device to enter a shutdown state. It restarts automatically when the temperature falls below 150 °C.
