Overview
The LD1117DT18C is a low drop voltage regulator produced by STMicroelectronics. It is part of the LD1117 series, which is known for its high efficiency and low dropout voltage. This specific model, LD1117DT18C, provides a fixed output voltage of 1.8V and can supply up to 800 mA of output current. The device is available in the DPAK package, which optimizes thermal characteristics and offers a space-saving design. The LD1117DT18C features an NPN pass transistor, ensuring that the quiescent current flows mostly into the load, enhancing overall efficiency. Only a minimum 10 µF capacitor is required for stability, and on-chip trimming allows for a tight output voltage tolerance of ±1% at 25°C.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 1.76 | 1.8 | 1.84 | V |
| Operating Input Voltage (Vin) | - | - | 15 | V |
| Output Current (IO) | - | - | 800 | mA |
| Line Regulation (∆VO) | 1 | - | 30 | mV |
| Load Regulation (∆VO) | 1 | - | 30 | mV |
| Temperature Stability (∆VO) | - | - | 0.5% | % |
| Long Term Stability (∆VO) | - | - | 0.3% | % |
| Dropout Voltage (Vd) | 1.10 | - | 1.20 | V @ 800mA |
| Supply Voltage Rejection (SVR) | 60 | 75 | - | dB @ 120Hz |
| Operating Temperature | -40 | - | 125 | °C |
| Package | - | - | DPAK | - |
Key Features
- Low dropout voltage (1 V typ.)
- Output current up to 800 mA
- Fixed output voltage of 1.8 V
- Adjustable version available (VREF = 1.25 V) for other models in the series
- Internal current and thermal limit
- Output voltage tolerance within ±1% at 25°C and ±2% over the full temperature range
- Supply voltage rejection: 75 dB (typ.)
- Available in SOT-223, DPAK, SO-8, and TO-220 packages, with DPAK optimizing thermal characteristics and space saving
- High efficiency due to NPN pass transistor
- Minimum 10 µF capacitor required for stability
- Over current and over temperature protection
Applications
The LD1117DT18C is suitable for various applications requiring stable and efficient voltage regulation. These include:
- Communications equipment
- Computers and peripherals
- Industrial applications
- Personal electronics
Q & A
- What is the maximum output current of the LD1117DT18C?
The LD1117DT18C can provide up to 800 mA of output current.
- What is the fixed output voltage of the LD1117DT18C?
The fixed output voltage of the LD1117DT18C is 1.8 V.
- What is the maximum operating input voltage for the LD1117DT18C?
The maximum operating input voltage for the LD1117DT18C is 15 V.[
- What is the typical dropout voltage of the LD1117DT18C?
The typical dropout voltage of the LD1117DT18C is 1 V.[
- What is the operating temperature range of the LD1117DT18C?
The operating temperature range of the LD1117DT18C is -40°C to 125°C.[
- Does the LD1117DT18C have built-in protection features?
Yes, the LD1117DT18C includes internal current and thermal limit protection.[
- What package type is the LD1117DT18C available in?
The LD1117DT18C is available in the DPAK package.[
- What is the supply voltage rejection (SVR) of the LD1117DT18C?
The supply voltage rejection (SVR) of the LD1117DT18C is typically 75 dB at 120 Hz.[
- Is the LD1117DT18C RoHS compliant?
Yes, the LD1117DT18C is lead-free and RoHS compliant.[
- What is the minimum capacitor required for stability?
A minimum 10 µF capacitor is required for stability.[
- What are some common applications for the LD1117DT18C?
The LD1117DT18C is commonly used in communications equipment, computers and peripherals, industrial applications, and personal electronics.[
