Overview
The LD1117D33CTR is a low drop voltage regulator produced by STMicroelectronics. This device is capable of providing up to 800 mA of output current and is available in both fixed and adjustable versions. The fixed version of the LD1117D33CTR offers a specific output voltage of 3.3 V, while the adjustable version allows for a variable output voltage based on the reference voltage (VREF = 1.25 V).
The regulator features a low dropout voltage of typically 1 V, internal current and thermal limiting, and high supply voltage rejection of 75 dB. It is supplied in various packages including SOT-223, DPAK, SO-8, and TO-220, which optimize thermal characteristics and offer space-saving benefits.
Key Specifications
| Parameter | Min. | Max. | Unit | |
|---|---|---|---|---|
| Output Voltage (VO) | 3.267 | 3.3 | 3.333 | V |
| Output Current (IO) | 800 | 950 | 1300 | mA |
| Operating Input Voltage (Vin) | - | - | 15 | V |
| Quiescent Current (Id) | 5 | 10 | - | mA |
| Dropout Voltage (Vd) | 1 | 1.1 | - | V |
| Line Regulation (∆VO) | 1 | 6 | - | mV |
| Load Regulation (∆VO) | 1 | 10 | - | mV |
| Temperature Stability (∆VO) | 0.5 | - | - | % |
| Supply Voltage Rejection (SVR) | 60 | 75 | - | dB |
| Thermal Resistance Junction-Case (RthJC) | 8 | - | - | °C/W |
| Thermal Resistance Junction-Ambient (RthJA) | 100 | - | - | °C/W |
Key Features
- Low dropout voltage of typically 1 V.
- Output current up to 800 mA.
- Fixed output voltage of 3.3 V (for LD1117D33CTR) and adjustable versions available.
- Internal current and thermal limiting.
- High supply voltage rejection of 75 dB.
- Available in ± 1 % (at 25 °C) and 2 % in full temperature range output voltage tolerance.
- Available in SOT-223, DPAK, SO-8, and TO-220 packages.
- Only a 10 µF minimum capacitor is needed for stability.
Applications
The LD1117D33CTR is suitable for a variety of applications requiring stable and efficient voltage regulation. These include:
- Power supplies for electronic devices.
- Voltage regulation in automotive systems.
- Industrial control systems.
- Consumer electronics such as audio equipment and set-top boxes.
- Telecommunication equipment.
Q & A
- What is the maximum output current of the LD1117D33CTR?
The maximum output current of the LD1117D33CTR is up to 800 mA.
- 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 LD1117D33CTR?
The typical dropout voltage of the LD1117D33CTR is 1 V.
- What is the operating input voltage range for the LD1117D33CTR?
The operating input voltage range for the LD1117D33CTR is up to 15 V.
- What is the quiescent current of the LD1117D33CTR?
The quiescent current of the LD1117D33CTR is typically 10 mA.
- What is the thermal resistance junction-case (RthJC) for the DPAK package?
The thermal resistance junction-case (RthJC) for the DPAK package is 8 °C/W.
- What is the supply voltage rejection (SVR) of the LD1117D33CTR?
The supply voltage rejection (SVR) of the LD1117D33CTR is typically 75 dB.
- 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 minimum capacitor required for stability?
A minimum capacitor of 10 µF is required for stability.
- What are some common applications of the LD1117D33CTR?
The LD1117D33CTR is commonly used in power supplies, automotive systems, industrial control systems, consumer electronics, and telecommunication equipment.
