Overview
The LD1117S25CTR is a low dropout voltage regulator produced by STMicroelectronics. This component is part of the LD1117 series, which is known for its high performance and versatility. The LD1117S25CTR specifically provides a fixed output voltage of 2.5 V and is capable of delivering up to 800 mA of output current. It is available in various packages, including SOT-223, DPAK, SO-8, and TO-220, each optimized for different thermal and space requirements.
Key Specifications
| Parameter | Min. | Max. | Unit | |
|---|---|---|---|---|
| Output Voltage (VO) | 2.475 | 2.5 | 2.525 | V |
| Output Current (IO) | 0 | 800 | 950 | mA |
| Dropout Voltage (Vd) | 1 | 1.1 | 1.2 | V |
| Line Regulation (∆VO) | 1 | 6 | mV | |
| Load Regulation (∆VO) | 1 | 10 | mV | |
| Supply Voltage Rejection (SVR) | 60 | 75 | dB | |
| Operating Input Voltage (Vin) | - | - | 15 | V |
| Quiescent Current (Id) | 5 | 10 | mA | |
| Thermal Resistance Junction-Case (RthJC) | 15 (SOT-223), 20 (SO-8), 8 (DPAK), 5 (TO-220) | - | - | °C/W |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1 V, ensuring high efficiency.
- High Output Current: Capable of delivering up to 800 mA of output current.
- Fixed and Adjustable Versions: Available in fixed output voltages (1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V) and an adjustable version (VREF = 1.25 V).
- Internal Current and Thermal Limit: Built-in current and thermal limiting for enhanced reliability.
- Tight Output Voltage Tolerance: Output voltage tolerance within ±1% at 25°C.
- High Supply Voltage Rejection: Supply voltage rejection of 75 dB (typical).
- Compact Packages: Available in SOT-223, DPAK, SO-8, and TO-220 packages, optimizing thermal characteristics and space usage.
Applications
The LD1117S25CTR is suitable for a wide range of applications requiring stable and efficient voltage regulation. These include:
- Power supplies for electronic devices
- Industrial control systems
- Automotive electronics
- Consumer electronics
- Telecommunication equipment
Q & A
- What is the maximum output current of the LD1117S25CTR?
The LD1117S25CTR can deliver up to 800 mA of output current.
- What are the available output voltages for the LD1117 series?
The LD1117 series offers fixed output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, as well as an adjustable version.
- What is the typical dropout voltage of the LD1117S25CTR?
The typical dropout voltage is 1 V.
- What are the package options for the LD1117S25CTR?
The component is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the operating junction temperature range for the LD1117S25CTR?
The operating junction temperature range is from -40°C to 125°C.
- What is the supply voltage rejection of the LD1117S25CTR?
The supply voltage rejection is 75 dB (typical).
- Does the LD1117S25CTR have built-in current and thermal limiting?
Yes, it has internal current and thermal limiting for enhanced reliability.
- What is the quiescent current of the LD1117S25CTR?
The quiescent current is between 5 mA and 10 mA.
- What is the thermal resistance junction-case for the different packages?
The thermal resistance junction-case varies by package: 15°C/W for SOT-223, 20°C/W for SO-8, 8°C/W for DPAK, and 5°C/W for TO-220.
- What is the long-term stability of the LD1117S25CTR?
The long-term stability is 0.3% over 1000 hours at 125°C.
