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The RT8026 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 2.7V to 5.5V, the RT8026 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 autoswitch and shut-down modes. 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 RT8026 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8026 enter shut-down mode and consumes less than 0.1μA when the EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small MSOP-10 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
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  • Input Voltage Range : 2.7V to 5.5V
  • Adjustable Output Voltage : 1V to VIN
  • Output Current : 1A
  • High Efficiency : up to 95%
  • No Schottky Diode Required
  • 1.5MHz Fixed-Frequency PWM Operation
  • Current Limiting Protection
  • Thermal Shutdown Protection
  • Small MSOP-10 Package
  • RoHS Compliant and Halogen Free
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Mobile Phones<br />Personal Information Appliances<br />Wireless and DSL Modems<br />MP3 Players<br />Portable Instruments
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