General Description
The RT8048 is a high-efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8048 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.

Features
• 2.5V to 5.5V Input Range
• 3MHz Fix-Frequency PWM Operation
• 1A Output Current
• 90% Efficiency
• No Schottky Diode Required
• 0.6V Reference Allows Low Output Voltage
• Low Dropout Operation : 100% Duty Cycle
• RoHS Compliant and Halogen Free

Applications
• Portable Instruments
• Microprocessors and DSP Core supplies
• Cellular Phones
• Wireless and DSL Modems
• PC Cards