Overview
The REG1117A-1.8/2K5 is a 1-A, 15-V, linear voltage regulator produced by Texas Instruments. This component is part of the REG1117A family, known for its ease of use and robust performance. The REG1117A-1.8/2K5 is specifically designed to provide a fixed output voltage of 1.8V, making it suitable for a variety of applications requiring stable and efficient voltage regulation.
This regulator operates over a wide temperature range from -40°C to +125°C, ensuring reliability in diverse environmental conditions. It features a low dropout voltage, internal current limit, and thermal overload protection, which enhance its reliability and efficiency.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 1.782 - 1.818 | V |
| Output Current | 1 A | A |
| Dropout Voltage | 1.2 - 1.3 V | V |
| Line Regulation | 1 - 7 mV | mV |
| Load Regulation | 2 - 10 mV | mV |
| Temperature Range | -40°C to +125°C | °C |
| Package Type | SOT-223-4 | |
| Output Tolerance | ±1% max | % |
| Ripple Rejection | 62 dB | dB |
Key Features
- Low Dropout Voltage: The REG1117A-1.8/2K5 has a low dropout voltage of 1.2V to 1.3V at 1A output current, allowing it to operate efficiently with minimal input-output voltage differential.
- Internal Current Limit and Thermal Overload Protection: These features protect the regulator from overload conditions and ensure safe operation.
- High Accuracy: Laser trimming ensures excellent output voltage accuracy without the need for adjustment.
- Wide Temperature Range: Operates from -40°C to +125°C, making it suitable for various environmental conditions.
- Surface-Mount Packages: Available in SOT-223 and DDPAK packages, facilitating easy integration into surface-mount designs.
Applications
- SCSI-2 Active Termination: Suitable for SCSI-2 active termination due to its precise voltage regulation.
- Hand-Held Data Collection Devices: Ideal for battery-powered devices requiring stable voltage regulation.
- Battery-Powered Instrumentation: Used in various battery-powered instruments and devices.
- Battery Management Circuits: Employed in battery management circuits for notebooks and palmtop PCs.
- Core Voltage Supply: Used as a core voltage supply for FPGA, PLD, DSP, and CPU applications.
Q & A
- What is the output voltage of the REG1117A-1.8/2K5?
The output voltage of the REG1117A-1.8/2K5 is 1.8V.
- What is the maximum output current of the REG1117A-1.8/2K5?
The maximum output current is 1A.
- What is the dropout voltage of the REG1117A-1.8/2K5?
The dropout voltage is 1.2V to 1.3V at 1A output current.
- What are the package types available for the REG1117A-1.8/2K5?
The regulator is available in SOT-223 and DDPAK surface-mount packages.
- What is the temperature range for the REG1117A-1.8/2K5?
The temperature range is from -40°C to +125°C.
- Does the REG1117A-1.8/2K5 have built-in protection features?
Yes, it has internal current limit and thermal overload protection.
- What is the ripple rejection of the REG1117A-1.8/2K5?
The ripple rejection is 62 dB.
- What kind of capacitor is recommended for use with the REG1117A-1.8/2K5?
A high-quality capacitor with an ESR (Effective Series Resistance) less than 0.5Ω, such as a 10µF tantalum capacitor or an aluminum electrolytic capacitor of 50µF or greater, is recommended.
- What are some common applications of the REG1117A-1.8/2K5?
Common applications include SCSI-2 active termination, hand-held data collection devices, battery-powered instrumentation, battery management circuits, and core voltage supply for FPGA, PLD, DSP, and CPU.
- How does the REG1117A-1.8/2K5 ensure high accuracy?
Laser trimming ensures excellent output voltage accuracy without the need for adjustment.
