The MIC5159YM6 is a high-efficiency, constant-frequency PWM boost regulator from Micrel (now Microchip Technology). It is designed for applications requiring a step-up DC-DC conversion, such as powering LCD displays, LED backlighting, and various portable devices.

Applications

• LCD bias supplies
• LED backlighting for portable devices
• Boost converters for battery-powered systems
• Portable media players
• Digital cameras

Features

• High efficiency: up to 90%
• Constant frequency PWM operation
• Internal synchronous rectifier
• Input voltage range: 2.5V to 10V
• Output voltage adjustable up to 34V
• Internal soft-start function
• Over-temperature protection
• Current limiting
• Available in a small 6-pin MSOP package

Benefits

• High efficiency minimizes power losses and extends battery life in portable applications.
• Constant frequency operation simplifies filtering and reduces EMI.
• Internal synchronous rectifier eliminates the need for an external Schottky diode, saving cost and space.
• Wide input voltage range allows for use with various battery types.
• Adjustable output voltage provides flexibility to support different application requirements.
• Internal soft-start prevents inrush current during startup.
• Over-temperature and current limiting protection enhance system reliability.
• Small package size allows for compact designs.

Technical Specifications

The MIC5159YM6 operates at a fixed switching frequency, typically around 1.2 MHz. It incorporates an internal MOSFET switch and synchronous rectifier. The output voltage is adjustable via an external resistor divider. The device includes over-temperature and current limiting protection circuits. The operating temperature range is typically -40°C to +85°C. It is available in a 6-pin MSOP package.

This boost regulator is suitable for use in various portable devices and applications where high efficiency and small size are critical requirements.