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L9396 数据表(PDF) 33 Page - STMicroelectronics |
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L9396 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 109 page  DS12539 Rev 6 33/109 L9396 Power supply 108 3.9 VCC regulator This regulator provides a dedicated rail to supply µC I/Os. It can be configured via VCCSEL pin to output either 3.3 V or 5 V. The VCC regulator has over and under voltage detections and is also protected against short to ground and over temperature with shared thermal sensor with VCC5. The state of VCCSEL pin is latched at power up when VPREREG voltage exceeds the VPREREG_UV threshold and stays latched until next POR event. All electrical characteristics are valid for the following conditions unless otherwise noted: -40 °C ≤ Tj ≤ +175 °C; VPREREG_L(Min) ≤ VPREREG ≤ VPREREG_H(Max). tsoftstart Softstart time From 10% to 90% of nominal output voltage 345 - 1035 µs TJSDVCCx Thermal Shutdown - 175 - 200 °C THYS_TSDVCCx Thermal Shutdown hysteresis -5 - 15 °C Table 13. VCC5 regulator electrical characteristics (continued) Symbol Parameter Conditions Min Typ Max Unit Table 14. VCC regulator electrical characteristics Symbol Parameter Conditions Min Typ Max Unit VCC_L Regulated output voltage 0mA ≤ IVCC ≤ 100mA; VCCSEL = ‘0’ 3.220 3.3 3.380 V VCC_H Regulated output voltage VPREREG ≥ 6V, 0mA ≤ IVCC ≤ 100mA; VCCSEL = ‘1’ 4.88 5 5.12 V VCCSEL_IH VCCSEL input high voltage -1.75 - - V VCCSEL_IL VCCSEL input low voltage -- - 0.75 V VCCSEL_Ihys VCCSEL input hysteresis - 100 - 1000 mV Ipd_VCCSEL VCCSEL input Pull down current VCCSEL=3.3V 1 - 10 µA VCC_UV Undervoltage threshold - VCC_x - 10% - VCC_x - 5% V VCC_OV Overvoltage threshold - VCC_x + 5% - VCC_x + 10% V tflt_VCC_UVOV Under/overvoltage filter time -- 12 - µs IVCC Output load current - 0 - 100 mA CVCC Output capacitor - 2.2 4.7 20 µF |
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