Overview
The LD1117DT50CTR, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide high performance and reliability in various electronic applications. This regulator is capable of delivering up to 800 mA of output current and is available in both fixed and adjustable output voltage versions. The fixed versions offer output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, while the adjustable version allows for a reference voltage (VREF) of 1.25 V. The LD1117DT50CTR is packaged in several formats, including TO-252-2 (DPAK), SOT-223, SO-8, and TO-220, each optimized for thermal characteristics and space efficiency.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TO-252-2 (DPAK) | |
| Output Current | Up to 800 mA | mA |
| Dropout Voltage | 1 V (typ.) | V |
| Fixed Output Voltages | 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V | V |
| Adjustable Reference Voltage | 1.25 V | V |
| Quiescent Current | 5 - 10 mA | mA |
| Supply Voltage Rejection (PSRR) | 75 dB (typ.) @ 120 Hz | dB |
| Operating Input Voltage | Up to 15 V | V |
| Operating Junction Temperature Range | -40 to +125 °C | °C |
| Thermal Resistance Junction-Case | 8 °C/W (DPAK) | °C/W |
| Thermal Resistance Junction-Ambient | 100 °C/W (DPAK) | °C/W |
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 Output Voltages: Available in fixed output voltages (1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V) and an adjustable version with a reference voltage of 1.25 V.
- Internal Current and Thermal Limiting: Built-in current and thermal limiting for enhanced reliability.
- Tight Output Voltage Tolerance: Output voltage tolerance within ±1% at 25°C and ±2% over the full temperature range.
- High Supply Voltage Rejection: Supply voltage rejection ratio (PSRR) of 75 dB at 120 Hz.
- Compact Packages: Available in SOT-223, DPAK, SO-8, and TO-220 packages, optimizing thermal characteristics and space efficiency.
Applications
- Power Supplies: Suitable for use in various power supply applications requiring low dropout voltage and high current output.
- Industrial Control Systems: Used in industrial control systems where stable and reliable voltage regulation is crucial.
- Consumer Electronics: Ideal for consumer electronics such as audio equipment, set-top boxes, and other devices requiring efficient voltage regulation.
- Automotive Systems: Can be used in automotive systems where robust and reliable voltage regulation is necessary.
- Medical Devices: Applicable in medical devices that require precise and stable voltage regulation.
Q & A
- What is the maximum output current of the LD1117DT50CTR?
The LD1117DT50CTR can deliver up to 800 mA of output current.
- What are the available fixed output voltages for the LD1117DT50CTR?
The fixed output voltages available are 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V.
- What is the reference voltage for the adjustable version of the LD1117DT50CTR?
The reference voltage for the adjustable version is 1.25 V.
- What is the typical dropout voltage of the LD1117DT50CTR?
The typical dropout voltage is 1 V.
- What is the supply voltage rejection ratio (PSRR) of the LD1117DT50CTR?
The PSRR is 75 dB at 120 Hz.
- What are the available packages for the LD1117DT50CTR?
The LD1117DT50CTR is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the operating junction temperature range for the LD1117DT50CTR?
The operating junction temperature range is -40 to +125 °C.
- Does the LD1117DT50CTR have internal current and thermal limiting?
Yes, it has built-in current and thermal limiting for enhanced reliability.
- What is the quiescent current of the LD1117DT50CTR?
The quiescent current is between 5 and 10 mA.
- What is the thermal resistance junction-case for the DPAK package?
The thermal resistance junction-case for the DPAK package is 8 °C/W.
