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1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter
RT8059GJ5 RT8059GJ5.pdf

No.10597

FEATURES

Wide Input Voltage from 2.8V to 5.5V

Adjustable Output from 0.6V to VIN

? 1A Output Current

95% Efficiency

No Schottky Diode Required

1.5MHz Fixed Frequency PWM Operation

Small TSOT-23-5 Package

RoHS Compliant and Halogen Free

DESCRIPTION

The RT8059 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 2.8V to 5.5V. The RT8059 is ideally suited for portable electronic devices that are powered by 1-cell Li-ion battery or by other power sources within the range, such as cellular phones, PDAs and handy-terminals.The RT8059 enters low dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8059 enters shutdown mode and consumes less than 0.1μA when the EN pin is pulled low.

The switching ripple can be easily smoothed out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small TSOT-23-5 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.

APPLICATION CIRCUIT
PIN CONFIGUTION
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