The RT8056 is a high efficiency synchronous dual step-down converter. Capable of delivering two independent 1A output current over a wide input voltage range from 2.8V to 5.5V. The RT8056 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. The RT8056 provides two operation modes including PWM/Low- Dropout auto switch and shutdown modes. The internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical applications. The RT8056 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8056 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 1.5MHz.
Applications
- Portable Instruments
- Microprocessors and DSP Core Supplies
- Cellular Phones
- Wireless and DSL Modems
- PC Cards
- Set Top Box