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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. Two operating modes are available including : PWM/Low Dropout auto switch and shut-down mode. The internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application. The RT8048 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8048 enters shut-down mode and consumes less than 0.1μA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 3MHz.
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  • 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
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Portable Instruments<br />Microprocessors and DSP Core supplies<br />Cellular Phones<br />Wireless and DSL Modems<br />PC Cards
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Keyword 1

Keyword 2

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