EVB_RT8008GB: 1.2V @ 600mA, 2.5 ~ 5.5Vin

The EVB_RT8008GB is a high-efficiency pulse-width-modulated (PWM) step-down DC/DC converter. Capable of delivering 600mA output current over an input voltage range of 2.5V to 5.5V, the RT8008 IC is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery (or from other power sources within that range) such as cellular phones, PDAs and handy-terminals.

An internal synchronous rectifier with low RDS(ON) dramatically reduces conduction losses in PWM mode. No external Schottky diode is required in practical applications. The RT8008 automatically turns off the synchronous rectifier when the inductor current is low entering discontinuous PFM mode to increase efficiency at light loads. The RT8008 enters Low-Dropout mode when normal PWM operation cannot regulate the output voltage, turning on the upper P-MOSFET continuously. The RT8008 enters shutdown mode and consumes less than 0.1µA when EN pin is pulled low.

The switching ripple is easily smoothed-out by small sized filtering elements due to a fixed operating frequency of 1.5MHz. This, along with its small SOT-23-5 and TSOT-23-5 packages provides a small PCB area. Other features include soft start, low internal reference voltage with 2% accuracy, over temperature protection, and over current protection.