The RT9258GQW is a high-efficiency synchronous boost converter from Richtek USA Inc., designed for applications requiring a stable output voltage from a lower input voltage. This converter integrates a low-side N-MOSFET and a high-side P-MOSFET to achieve high efficiency and minimize external component count.

Applications:

• Portable power devices: Used in smartphones, tablets, and other portable devices to boost battery voltage for various components.
• LED backlighting: Powers LED backlights in LCD displays.
• Power banks: Boosts the voltage from the battery to power USB devices.
• Single-cell Li-Ion battery applications: Provides a stable voltage for systems powered by a single Li-Ion battery.

Features:

• High Efficiency: Synchronous rectification for optimal efficiency.
• Integrated MOSFETs: Internal low-side N-MOSFET and high-side P-MOSFET for minimized external components.
• Adjustable Output Voltage: Output voltage can be adjusted with external resistors.
• Over-Voltage Protection (OVP): Protects the output from over-voltage conditions.
• Over-Current Protection (OCP): Limits the inductor current to protect the converter from overload.
• Under-Voltage Lockout (UVLO): Prevents operation when the input voltage is too low.
• Thermal Shutdown Protection: Protects the IC from overheating.
• Small Footprint: Available in a small package for space-constrained applications.

Benefits:

• Extended Battery Life: High efficiency minimizes power loss and extends battery life in portable devices.
• Reduced Component Count: Integrated MOSFETs reduce the number of external components required, saving space and cost.
• Stable Output Voltage: Provides a stable and regulated output voltage, ensuring reliable operation of downstream components.
• Robust Protection: Comprehensive protection features prevent damage from over-voltage, over-current, and over-temperature conditions.
• Compact Design: Small package size makes it suitable for use in space-constrained applications.

Additional Details:

The RT9258GQW operates at a high switching frequency, enabling the use of smaller external components. It features a soft-start function to limit inrush current during startup. The device is available in a thermally enhanced package to improve heat dissipation.