MIC2288YD5-TR

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MIC2288YD5-TR is a DC DC switching regulator. It is designed to efficiently convert a higher voltage DC supply to a lower voltage DC supply, while providing an adjustable output voltage and a programmable switching frequency. It is suitable for use in a wide range of applications, including industrial, automotive and consumer electronics.

Features

• Supply Voltage Range: 4.5V to 20V
• Output Voltage Range: 0.8V to 14V
• Output Current: up to 4A
• Programmable Frequency: 250kHz to 1MHz
• Stable Output Voltage with Over-Temperature and Overload Protection
• Soft Start Control for Low Output Ripple

Applications

• Battery Management Systems
• Centralized or Distributed Power Control
• Charge Pump Application
• LED Lighting
• Data and Telecom Power Systems
• Portable Equipment

Working Principle

The MIC2288YD5-TR is a non-isolated buck DC DC switching regulator. It operates in two phases, first in an on-time phase and then in an off-time phase. During the on-time phase, the switching transistor (Q2) is turned on. This connects the output capacitor to the input DC supply, charging the capacitor and providing the regulated output voltage. During the off-time phase, the switching transistor (Q2) is turned off, disconnecting the output capacitor from the input supply, and allowing the output voltage to regulate itself. The frequency at which the phases are reversed is called the switching frequency, and is controlled by a fixed-frequency clock, which is set using an external resistor connected to the CLK pin.

The MIC2288YD5-TR also provides several protection features to ensure safe operation. Over-temperature protection is provided by monitoring the die temperature, and a thermal shutdown circuit is used to disable the regulator when temperature limits are exceeded. Overload protection is provided by monitoring the output current, and the regulator will shut down when the output current exceeds the predetermined limit. Soft start is also provided to reduce output ripple, which is especially important when the input voltage is high.

Conclusion

The MIC2288YD5-TR is a DC DC switching regulator suitable for a wide range of applications. It offers an adjustable output voltage and programmable switching frequency, and provides several protections including over-temperature, overload and soft start protection. With its wide input and output voltage ranges and up to 4A of output current, the MIC2288YD5-TR is an ideal choice for powering industrial, automotive and consumer electronics applications.

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