RT9064-33GV

RT9064-33GV is an advanced, cost-effective, low-noise step-down DC-DC converter with 1.2MHz switching frequency. It is designed to provide high efficiency and wide input voltage range for Li-ion/ Li-polymer/Lead acid/super capacitors battery sources. RT9064-33GV has excellent transient response and low output noise which enable it to meet all the needs from a portable device.

Application Field

RT9064-33GV is ideal for applications including:

• Digital cameras and digital video cameras
• MP3 players
• Personal digital assistants (PDAs)
• Portable devices
• Wireless devices
• Notebook and desktop PCs
• LCD TVs, GPS, and Telecom infrastructure
• Automotive systems, medical and industrial applications

Working Principle

RT9064-33GV consists of two main components. The main component is a synchronous internal switch that consists of a high-side mosfet and a low side mosfet. It is controlled by an internal oscillator which produces a ramp wave that turns on and off the internal mosfets in order to regulate the output voltage. The other important component is a linear regulator. The linear regulator senses the input current at the output terminals and adjusts the output voltage by converting some of the energy into heat.

The converter starts up by conducting turning on the internal high-side mosfet. This will allow the input voltage to be connected to the outputs through the inductor and capacitor filter network, and the output capacitor will begin to charge. As soon as the output capacitor reaches the preset voltage level, the high side mosfet will be shut off, which will disconnect the input voltage from the outputs. The low side switch continues to operate, allowing the energy stored in the output capacitor to be delivered to the load. The output voltage will then be regulated by a linear regulator.

At the same time a signal is sent to each internal mosfet, the output voltage is sensed by a feedback loop. If the output voltage exceeds the preset voltage level, an error signal is generated which will reduce the duty cycle of the internal mosfets. At the same time, the linear regulator will reduce the output voltage to bring it down to the preset level. This mechanism will ensure that the output voltage is kept at a constant level strong enough to meet the application’s requirements.

Conclusion

RT9064-33GV is an advanced, cost-effective, low-noise step-down DC-DC converter. It is ideal for a wide range of applications including digital cameras and digital video cameras, MP3 players, notebook and desktop PCs, LCD TVs, GPS, and Telecom infrastructure. The converter operates by conducting a synchronous switch that is controlled by an internal oscillator and a linear regulator. It features excellent transient response, low output noise, and high efficiency make it an excellent choice for power conversion applications.