Overview
The LD1117DT18CTR from STMicroelectronics is a high-accuracy, low dropout voltage regulator designed for use in automotive and industrial applications. This regulator is part of the LD1117 series, which offers both fixed and adjustable output voltage options. The LD1117DT18CTR specifically provides a fixed output voltage of 1.8 V. It is available in various packages, including SO-8 and PowerSSO-12, which are optimized for thermal performance and space efficiency.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 1.8 | V |
| Output Current | Up to 800 mA | mA |
| Dropout Voltage | 1 V (typ.), 1.1 V (max. at 100 mA), 1.2 V (max. at 800 mA) | V |
| Line Regulation | 0.035% to 0.2% (Vin - VO = 1.5 to 13.75 V, IO = 10 mA) | % |
| Load Regulation | 0.1% to 0.4% (Vin - VO = 3 V, IO = 10 to 800 mA) | % |
| Temperature Stability | 0.5% | % |
| Operating Input Voltage | Up to 15 V | V |
| Quiescent Current | 5 to 10 mA (Vin ≤ 10 V) | mA |
| Supply Voltage Rejection | 60 to 75 dB (IO = 40 mA, f = 120 Hz, TJ = 25 °C) | dB |
| Thermal Resistance Junction-Case | 15 to 20 °C/W (depending on package) | °C/W |
| Thermal Resistance Junction-Ambient | 110 to 55 °C/W (depending on package) | °C/W |
Key Features
- Low Dropout Voltage: 1 V typical, ensuring high efficiency.
- High Output Current: Up to 800 mA.
- Fixed Output Voltages: Available in 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V.
- Adjustable Version: Available with a reference voltage (VREF) of 1.25 V.
- Internal Current and Thermal Limit: Built-in protection against overcurrent and overheating.
- Tight Output Voltage Tolerance: ±1% at 25 °C and ±2% over the full temperature range.
- High Supply Voltage Rejection: 75 dB typical.
- Compact Packages: Available in SOT-223, DPAK, SO-8, and TO-220 packages, optimizing thermal performance and space efficiency.
Applications
- Automotive Systems: Suitable for use in automotive electronics due to its robustness and high performance.
- Industrial Control Systems: Ideal for industrial applications requiring stable and efficient voltage regulation.
- Consumer Electronics: Can be used in various consumer electronic devices requiring reliable voltage regulation.
- Power Supplies: Used in power supply units to provide stable output voltages.
Q & A
- What is the output voltage of the LD1117DT18CTR?
The output voltage of the LD1117DT18CTR is 1.8 V.
- What is the maximum output current of the LD1117DT18CTR?
The maximum output current is up to 800 mA.
- What are the available packages for the LD1117 series?
The LD1117 series is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the typical dropout voltage of the LD1117DT18CTR?
The typical dropout voltage is 1 V.
- Does the LD1117DT18CTR have built-in protection features?
Yes, it has internal current and thermal limit protection.
- What is the supply voltage rejection of the LD1117DT18CTR?
The supply voltage rejection is 75 dB typical.
- What is the operating input voltage range for the LD1117DT18CTR?
The operating input voltage range is up to 15 V.
- What is the quiescent current of the LD1117DT18CTR?
The quiescent current is 5 to 10 mA (Vin ≤ 10 V).
- Is the LD1117DT18CTR suitable for automotive applications?
Yes, it is designed for use in automotive and industrial applications.
- What is the thermal resistance junction-case for the SO-8 package?
The thermal resistance junction-case for the SO-8 package is 20 °C/W.
