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ST1S15 Datasheet(PDF) 1 Page - STMicroelectronics |
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ST1S15 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 27 page  February 2015 DocID023280 Rev 4 1/27 This is information on a product in full production. www.st.com ST1S15 500 mA, 6 MHz synchronous step-down converter Datasheet - production data Features 85% typical efficiency 500 mA output current capability 45 µA typical quiescent current PFM or PWM operation for best efficiency over whole load range Ultra-fast load and line transient Short-circuit and thermal protection Small external components Auto or forced PWM selection with dedicated pin Available in Flip Chip 6 package Applications DSP and multimedia processor core supply Cell phones PDAs Description The ST1S15 is a high efficiency miniaturized step-down converter able to provide 500 mA output current from an input voltage from 2.3 V to 5.5 V. This converter is specifically designed for applications where high efficiency and small application area are the key factors. Thanks to 6 MHz switching frequency, the ST1S15 can use 470 nH nominal values for the inductor and 4.7 µF for the output capacitor providing, at the same time, very good performance in terms of load and line transients. A PFM mode can be selected for high efficiency under light load conditions or PWM mode for tight regulation and best dynamic performance. Short-circuit and thermal protection are also included. Table 1: Device summary Order code Output voltage (V) Package ST1S15J18R 1.82 Flip Chip 6 |
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