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L6933H1.2 Scheda tecnica(PDF) 6 Page - STMicroelectronics |
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L6933H1.2 Scheda tecnica(HTML) 6 Page - STMicroelectronics |
6 / 12 page Typical electrical performance L6933H1.2 6/12 5 Typical electrical performance 6 Soft-Start When Vin is above the turn-on threshold, the device implements the Soft-Start phase: a 5 µA current is sourced from the SS pin charging the external capacitor. The voltage across SS capacitor increases until it reaches about 8 V. The output voltage is in regulation when the SS voltage exceeds VOUT + 1 V. The SS time results: If VIN is below the turn-on threshold, the SS pin is kept shorted to GND. The SS pin can also be used as ENABLE by shorting the pin to GND through an external switch: when the voltage at this pin is lower than 0.5 V, the device is disabled. Figure 4. Output voltage vs junction temperature Figure 5. Quiescent current vs junction temperature T SS C SS V OUT 1 + () • I SS ---------------------------------------------- = |
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