The MIC4690BMTR is a synchronous step-down (buck) regulator from Micrel, now Microchip Technology. It is designed to provide a regulated output voltage from a higher input voltage with high efficiency. This regulator integrates both high-side and low-side MOSFETs, simplifying the design and reducing external component count. It also features internal compensation, further simplifying the design process.

Applications

• Point-of-Load (POL) Regulation: Powering microprocessors, memory chips, and other digital logic circuits in servers, networking equipment, and embedded systems.
• Battery Chargers: Charging lithium-ion batteries in portable devices.
• Distributed Power Systems: Providing regulated power to various modules in distributed power systems.
• Industrial Control Systems: Powering sensors, actuators, and other components in industrial control systems.
• Automotive Applications: Powering electronic control units (ECUs) and other automotive systems.

Features

• High Efficiency: Up to 95% efficiency, minimizing power losses and extending battery life.
• Integrated MOSFETs: Integrated high-side and low-side MOSFETs reduce component count and simplify design.
• Internal Compensation: Simplifies design and reduces external component count.
• Adjustable Output Voltage: Allows for flexible voltage programming.
• Over-Current Protection (OCP): Protects the device from damage due to over-current conditions.
• Thermal Shutdown: Protects the device from overheating.
• Input Voltage Range: Wide input voltage range allows for operation with various power sources.

Benefits

• High Efficiency: Reduces power consumption and extends battery life.
• Simplified Design: Integrated MOSFETs and internal compensation reduce design complexity and time-to-market.
• Compact Solution: Integrated MOSFETs and internal compensation minimize the need for external components, saving space and cost.
• Robust Protection: Over-current protection and thermal shutdown ensure reliable operation and protect the device from damage.
• Flexible Voltage Programming: Adjustable output voltage allows for flexible voltage programming.

The MIC4690BMTR is available in a small package. It is suitable for power-sensitive applications. The wide input voltage range and robust protection circuits makes it reliable.