Overview
The LD1117ADT12TR is a low drop voltage regulator produced by STMicroelectronics. This device is part of the LD1117A series, which is capable of providing up to 1 A of output current. The LD1117ADT12TR specifically offers a fixed output voltage of 1.2 V. It is available in the DPAK package, which optimizes thermal characteristics and offers a space-saving advantage. The regulator features high efficiency thanks to an NPN pass transistor and requires only a 10 μF minimum capacitor for stability. The output voltage tolerance is tightly controlled within ± 2% at 25 °C through chip trimming.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Min) | 2.75 | V |
| Input Voltage (Max) | 8 | V |
| Output Voltage | 1.2 | V |
| Output Current (Max) | 1 | A |
| Dropout Voltage (Typ @ 1 A, 25 °C) | 1.15 | V |
| Quiescent Current (Typ @ 25 °C) | 5 | mA |
| Operating Temperature Range | 0 to 125 | °C |
| Supply Voltage Rejection (Typ @ 25 °C) | 80 | dB |
| Package Type | DPAK |
Key Features
- Low Dropout Voltage: 1.15 V typical at 1 A output current and 25 °C.
- Very Low Quiescent Current: 5 mA typical at 25 °C.
- High Output Current: Up to 1 A.
- Fixed Output Voltage: 1.2 V.
- High Efficiency: Achieved through an NPN pass transistor.
- Minimal Capacitance Requirement: Only a 10 μF minimum capacitor is needed for stability.
- Tight Output Voltage Tolerance: Within ± 2% at 25 °C.
- High Supply Voltage Rejection: 80 dB typical at 25 °C.
Applications
The LD1117ADT12TR is suitable for a variety of applications requiring stable and efficient voltage regulation. These include:
- Power Supply Systems: For providing a stable 1.2 V output voltage in power supply circuits.
- Embedded Systems: In microcontroller and microprocessor-based systems requiring a low dropout voltage regulator.
- Automotive Electronics: For use in automotive systems where high efficiency and reliability are crucial.
- Industrial Control Systems: In industrial automation and control systems needing stable voltage regulation.
Q & A
- What is the maximum output current of the LD1117ADT12TR?
The maximum output current is up to 1 A.
- What is the fixed output voltage of the LD1117ADT12TR?
The fixed output voltage is 1.2 V.
- What is the typical dropout voltage at 1 A output current and 25 °C?
The typical dropout voltage is 1.15 V.
- What is the quiescent current of the LD1117ADT12TR at 25 °C?
The quiescent current is 5 mA typical.
- What is the minimum input voltage required for the LD1117ADT12TR?
The minimum input voltage is 2.75 V.
- What is the maximum input voltage for the LD1117ADT12TR?
The maximum input voltage is 8 V.
- What package type is the LD1117ADT12TR available in?
The LD1117ADT12TR is available in the DPAK package.
- What is the operating temperature range of the LD1117ADT12TR?
The operating temperature range is from 0 to 125 °C.
- What is the supply voltage rejection of the LD1117ADT12TR at 25 °C?
The supply voltage rejection is 80 dB typical.
- What is the minimum capacitance required for stability?
The minimum capacitance required is 10 μF.
