The SPX1117R/TR is a low dropout positive voltage regulator manufactured by Sipex Corporation. It provides a regulated output voltage with a minimal voltage drop, making it suitable for applications where input voltage is close to the desired output voltage. The '/TR' suffix often indicates that the part is supplied in tape and reel packaging.

Applications:

• Linear Regulators for Motherboards: Provides stable voltage to motherboard components.
• High-Efficiency Linear Regulators: Used in applications where efficiency is critical.
• Post Regulators for Switching Supplies: Reduces ripple and noise after a switching regulator.
• Battery Chargers: Used in battery charging circuits to provide a regulated voltage.
• Instrumentation: Powers sensitive instrumentation equipment with a stable voltage.

Features:

• Low Dropout Voltage: Operates with minimal input-output voltage differential.
• Adjustable Output Voltage: Output voltage can be adjusted using external resistors.
• Current Limiting: Protects the regulator and connected loads from overcurrent conditions.
• Thermal Shutdown: Shuts down the regulator in case of overheating.
• Three-Terminal Adjustable or Fixed Output: Provides flexibility in design.

Benefits:

• Extended Battery Life: Low dropout voltage extends battery life in portable devices.
• Stable Output Voltage: Provides a stable output voltage even with varying input voltage and load conditions.
• Increased System Reliability: Protection features enhance system reliability.
• Simplified Design: Requires few external components.
• Cost-Effective: Provides a cost-effective solution for voltage regulation.

Additional Details:

The SPX1117R/TR is available in various surface mount packages, most commonly SOT-223. It typically requires just a few external components (input and output capacitors) for stable operation. The output voltage can be adjusted using two external resistors to create a voltage divider. Internal current limiting and thermal shutdown protect the device from overcurrent and overheating conditions. The low dropout voltage characteristic makes it particularly useful in battery-powered applications, where the input voltage decreases as the battery discharges. The 'TR' suffix indicates that the part is supplied on tape and reel, which is suitable for automated assembly processes. The device is designed to operate over a wide temperature range.