The MIC2211-1.5/1.8BML is a high-efficiency, synchronous, step-down regulator manufactured by Micrel (now Microchip Technology). It is designed to provide a regulated output voltage from a higher input voltage, typically used in portable devices and other applications where efficiency and small size are critical. This regulator is pre-set to output both 1.5V and 1.8V based on control pin settings.

Applications

• Portable Devices: Powering core voltages for processors and memory in smartphones, tablets, and other handheld devices.
• Point-of-Load Regulation: Providing local regulation for sensitive circuits on printed circuit boards.
• Battery-Powered Systems: Efficiently stepping down battery voltage to power various components.
• Solid-State Drives (SSDs): Powering the memory and controller circuits in SSDs.
• FPGA and Microprocessor Power: Providing regulated power to FPGAs and microprocessors.

Features

• High Efficiency: Synchronous rectification improves efficiency compared to diode-based regulators.
• Small Size: Compact package for space-constrained applications.
• Fixed Output Voltages: Preset output voltages of 1.5V and 1.8V simplifies design.
• High Switching Frequency: Allows for the use of smaller external components.
• Current Limit Protection: Protects the regulator and the load from overcurrent conditions.
• Over-Temperature Protection: Shuts down the regulator in case of excessive temperature.
• Enable/Shutdown Control: Allows for turning the regulator on and off.

Benefits

• Long Battery Life: High efficiency extends battery life in portable devices.
• Reduced System Size: Small size allows for more compact designs.
• Simplified Design: Fixed output voltages reduce the complexity of power supply design.
• Improved System Reliability: Overcurrent and over-temperature protection enhance reliability.
• Flexible Operation: Enable/shutdown control allows for power saving.
• Reduced Heat Dissipation: High efficiency minimizes heat generation.

Additional Details

The MIC2211-1.5/1.8BML typically operates with an input voltage range of 2.5V to 5.5V. The switching frequency is generally in the MHz range, enabling the use of small inductors and capacitors. The current limit is set to protect the regulator and the load. The over-temperature protection threshold is typically around 150°C. The enable/shutdown pin is used to control the regulator's operation. The regulator requires external components such as an inductor, input capacitor, and output capacitor. The datasheet provides detailed information on component selection and layout considerations. Proper layout is crucial to minimize noise and ensure stable operation. The package type is typically a small MLF or QFN package. The operating temperature range is typically from -40°C to +85°C.