Automotive Power

TLF50281: New 500mA Buck Converter with Low Current Consumption and High Switching Frequency

Application diagram

The new TLF50281 is a 500mA buck converter with an output voltage of 5V (±2%) and a low quiescent current of 45µA. Thanks to a nominal switching frequency of 2.2MHz, small external components can be used, which in turn saves on PCB space. Integrated compensation and soft-start functions further reduce the number of  external components. TLF50281 provides ENABLE and RESET capabilities with adjustable thresholds and a standard WATCHDOG. TLF50281 comes in a thermally enhanced, RoHS-compliant, SSOP-14 exposed pad package.

Output voltage: VQ = 5V (±2%) Output current: IQ = 500mA  Low current consumption: Iq = 45µA Integrated power transistor High switching frequency (2.2MHz nominal) for small inductors Synchronization input und frequency adjustment Integrated compensation Integrated soft-start function Enable Reset with adjustable RES threshold Watchdog with adjustable WD timing Automotive input voltage range up to 45V Automotive-qualified and RoHS compliance

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