Overview
The LD1117ADT25TR is a low drop voltage regulator produced by STMicroelectronics. This component is part of the LD1117 series, known for its high efficiency and low dropout voltage. The LD1117ADT25TR specifically provides a fixed output voltage of 2.5V and can supply up to 1 A of output current. It is available in the DPAK (TO-252-3) package, which optimizes thermal characteristics and offers a space-saving design. The regulator features an internal current and thermal limit, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Test Condition | Min. | Max. | Unit | |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 4.5 V, IO = 10 mA, TJ = 25 °C | 2.45 | 2.5 | 2.55 | V |
| Output Voltage (VO) | IO = 0 to 1 A, Vin = 3.3 to 10 V | 2.4 | 2.6 | V | |
| Line Regulation (∆VO) | Vin = 3.3 to 10 V, IO = 0 mA | 1 | 6 | 30 | mV |
| Load Regulation (∆VO) | Vin = 3.3 V, IO = 0 to 1 A | 1 | 10 | 30 | mV |
| Dropout Voltage (Vd) | IO = 100 mA | 1 | 1.10 | V | |
| Dropout Voltage (Vd) | IO = 500 mA | 1.05 | 1.15 | V | |
| Dropout Voltage (Vd) | IO = 1 A | 1.15 | 1.30 | V | |
| Quiescent Current (Id) | Vin ≤ 10 V | 5 | 10 | mA | |
| Supply Voltage Rejection (SVR) | IO = 40 mA, f = 120 Hz, TJ = 25 °C | 60 | 75 | 80 | dB |
| Operating Input Voltage (Vin) | IO = 100 mA | 15 | V | ||
| Operating Junction Temperature (TOP) | 0 | 125 | °C |
Key Features
- Low Dropout Voltage: 1 V typical
- Output Current: Up to 1 A
- Fixed Output Voltage: 2.5 V
- Adjustable Version Availability: With VREF = 1.25 V (though the specific part LD1117ADT25TR is fixed)
- Internal Current and Thermal Limit: For overcurrent and overtemperature protection
- High Supply Voltage Rejection: 75 dB typical
- Package Options: Available in DPAK (TO-252-3) package
- Thermal Characteristics: Optimized thermal performance with surface mount packages
- Stability: Requires only a 10 µF minimum capacitor for stability
Applications
- Communications Equipment: Suitable for use in various communication devices due to its high efficiency and low dropout voltage
- Computers and Peripherals: Can be used in computer systems and peripherals requiring stable voltage regulation
- Industrial Applications: Applicable in industrial settings where reliable voltage regulation is crucial
- Personal Electronics: Ideal for use in portable and personal electronic devices due to its low dropout voltage and high current capability
Q & A
- What is the maximum output current of the LD1117ADT25TR?
The LD1117ADT25TR can provide up to 1 A of output current
- What is the fixed output voltage of the LD1117ADT25TR?
The fixed output voltage of the LD1117ADT25TR is 2.5 V
- What is the typical dropout voltage of the LD1117ADT25TR?
The typical dropout voltage is 1 V
- What package is the LD1117ADT25TR available in?
The LD1117ADT25TR is available in the DPAK (TO-252-3) package
- What is the operating junction temperature range of the LD1117ADT25TR?
The operating junction temperature range is 0 °C to 125 °C
- Does the LD1117ADT25TR have internal protection features?
Yes, it has internal current and thermal limits for overcurrent and overtemperature protection
- What is the supply voltage rejection of the LD1117ADT25TR?
The supply voltage rejection is 75 dB typical
- What is the quiescent current of the LD1117ADT25TR?
The quiescent current is 5 mA typical
- Is the LD1117ADT25TR RoHS compliant?
Yes, the LD1117ADT25TR is lead-free and RoHS compliant
- What is the minimum capacitor required for stability?
A minimum of 10 µF capacitor is required for stability
