Overview
The LD1117S18CTR, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide high efficiency and stability in various electronic applications. This component is available in both fixed and adjustable output voltage versions, with the LD1117S18CTR specifically offering a fixed output voltage of 1.8 V. It is capable of delivering up to 800 mA of output current, making it suitable for a wide range of power supply needs.
The device features a low dropout voltage of 1 V typical, internal current and thermal limiting, and high supply voltage rejection of 75 dB typical. It is available in several package types, including SOT-223, DPAK, SO-8, and TO-220, which optimize thermal characteristics and offer space-saving benefits.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 1.8 V | 1.76 V | 1.84 V | V |
| Output Current (IO) | 800 mA | - | 1300 mA | mA |
| Dropout Voltage (Vd) | 1.1 V | 1 V | 1.2 V | V |
| Line Regulation (∆VO) | 0.2 % | 0.035 % | 0.2 % | % |
| Load Regulation (∆VO) | 0.4 % | 0.1 % | 0.4 % | % |
| Quiescent Current (Id) | 5 mA | - | 10 mA | mA |
| Supply Voltage Rejection (SVR) | 75 dB | 60 dB | 75 dB | dB |
| Operating Input Voltage (Vin) | - | - | 15 V | V |
| Thermal Resistance Junction-Case (RthJC) | - | - | 20 °C/W (SO-8) | °C/W |
| Storage Temperature Range (TSTG) | - | -40 °C | 150 °C | °C |
| Operating Junction Temperature Range (TOP) | - | -40 °C | 125 °C | °C |
Key Features
- Low dropout voltage of 1 V typical.
- Output current up to 800 mA.
- Fixed output voltage of 1.8 V.
- Adjustable version available with VREF = 1.25 V.
- Internal current and thermal limiting.
- High supply voltage rejection of 75 dB typical.
- 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.
- Minimum 10 µF capacitor required for stability.
Applications
The LD1117S18CTR is suitable for a variety of applications requiring stable and efficient voltage regulation, including:
- Power supplies for electronic devices.
- Voltage regulators in industrial control systems.
- Automotive electronics.
- Consumer electronics such as audio and video equipment.
- Medical devices requiring stable power supply.
Q & A
- What is the output voltage of the LD1117S18CTR?
The output voltage of the LD1117S18CTR is 1.8 V.
- What is the maximum output current of the LD1117S18CTR?
The maximum output current of the LD1117S18CTR is up to 800 mA.
- What is the typical dropout voltage of the LD1117S18CTR?
The typical dropout voltage of the LD1117S18CTR is 1 V.
- What are the available package types for the LD1117S18CTR?
The LD1117S18CTR is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the minimum capacitor required for stability?
A minimum 10 µF capacitor is required for stability.
- What is the operating input voltage range for the LD1117S18CTR?
The operating input voltage range for the LD1117S18CTR is up to 15 V.
- 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.
- What is the storage temperature range for the LD1117S18CTR?
The storage temperature range for the LD1117S18CTR is -40 °C to 150 °C.
- What is the operating junction temperature range for the LD1117S18CTR?
The operating junction temperature range for the LD1117S18CTR is -40 °C to 125 °C.
- What is the supply voltage rejection of the LD1117S18CTR?
The supply voltage rejection of the LD1117S18CTR is 75 dB typical.
