The KIA1117BS25 is a low dropout (LDO) positive voltage regulator manufactured by KEC (Korea Electronics Co., Ltd.). This regulator is designed to provide a stable and regulated 2.5V output voltage with a low dropout voltage, making it suitable for various battery-powered and portable applications where maintaining a stable voltage supply is crucial, even when the input voltage is close to the output voltage.

Applications

• Battery-powered devices
• Portable electronics
• Post-regulation for switching power supplies
• Microcontroller power supplies
• Linear regulation in noise-sensitive applications

Features

• Fixed 2.5V output voltage
• Low dropout voltage (typically less than 1.2V at rated current)
• Output current up to 800mA (depending on package and thermal conditions)
• Short-circuit protection
• Thermal overload protection
• Available in various surface-mount packages (e.g., SOT-223, SOT-89)

Benefits

• Stable and regulated output voltage even with varying input voltage or load current
• Extended battery life due to low dropout voltage
• Protection against damage from short circuits and overheating
• Simplified circuit design with integrated protection features
• Reduced component count compared to discrete regulator solutions

Additional Details

The KIA1117BS25 requires external capacitors for input and output filtering to ensure stability and optimal performance. The values of these capacitors are typically specified in the datasheet and depend on the load current and input voltage ripple. The device's thermal resistance is an important parameter to consider when designing for higher current applications, as it determines the maximum power dissipation capability. The KIA1117 series also includes other fixed and adjustable voltage options, allowing designers to choose the most suitable regulator for their specific application requirements. Its robust design and protection features make it a reliable choice for powering sensitive electronic components.