The LT1173CN8-5 is a versatile and compact step-up/step-down switching voltage regulator from Linear Technology. This particular model is designed to provide a fixed 5V output with a wide input range, making it an ideal choice for battery-powered applications, portable devices, and any system where a stable 5V supply is needed from a variable input source.

This regulator comes in an 8-pin PDIP (Plastic Dual In-line Package) which is suitable for through-hole mounting, ensuring ease of integration into a variety of circuit designs. The LT1173CN8-5 is capable of delivering up to 500mA of output current, which is sufficient for many small to medium power requirements.

Key Features:

• Versatile Input Voltage Range: The device can operate from an input voltage as low as 3.0V and as high as 30V, making it flexible for use with various power sources.
• Adjustable Switching Frequency: The LT1173CN8-5 allows the user to set the switching frequency anywhere from 40kHz to 100kHz through an external resistor, which can be optimized for efficiency or component size.
• High Efficiency: Its high efficiency is achieved through a low quiescent current and the use of a current mode PWM design, which also provides fast transient response and excellent loop stability.
• Internal 1.25A Switch: The internal switch can handle 1.25A, which provides good margin for the 500mA output current capability.
• Thermal Protection: The LT1173CN8-5 includes thermal shutdown to protect the device under over-temperature conditions.
• Low Battery Detector: The built-in low battery detector can be configured to provide an early warning for low input voltage, which is critical for battery-powered applications.

With its robust set of features, the LT1173CN8-5 is a reliable solution for designers looking to implement an efficient power supply in their systems. Its ease of use, combined with the support and quality assurance from Linear Technology, makes it a popular choice for a wide range of applications.