TLE6389G50 Datasheet

Switching Controllers


The TLE6389( TLE6389G50 ) step-down DC-DC switching controllers provide high efficiency over loads ranging from 1mA up to 3A. A unique PWM/PFM control scheme operates with up to a 100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates minimum load requirements and reduces the supply current under light loads to 100µA. These step-down controllers drive an external P-channel MOSFET, allowing design flexibility for applications up to 3A. A high switching frequency (up to 350kHz) and operation in continuous-conduction mode allow the use of tiny surface-mount inductors. Output capacitor requirements are also reduced, minimizing PC board area and system costs. The output voltage is preset at 5V (TLE6389-50) or 3.3V (TLE6389-33) and adjustable for the TLE6389. Input voltages can be up to 60V. TLE6389G50 Features • Operation from 5V to 60V Input Voltage• 100% Maximum Duty Cycle• Efficiency >90%• Output Current up to 3A• Less than 100µA Quiescent Current• 2µA Max Shutdown Current• Up to 350kHz Switching Frequency• Adjustable and Fixed 5V and 3.3V Output Voltage versions• 3% output voltage accuracy (PWM Mode)• Current-Mode Control Scheme• On Chip Low Battery Detector


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