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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9680 데이터시트(PDF) 49 Page - STMicroelectronics |
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L9680 데이터시트(HTML) 49 Page - STMicroelectronics |
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49 / 286 page  DS11615 Rev 7 49/286 L9680 Start-up and power control 285 An open VCC pin shall lead to an under voltage condition on VCC supply monitor. The SPI related signals (SCLK, MISO, MOSI, CS) or other digital nets shall not power the VCC pin due to back-feeding paths. Figure 24. VCC regulator state diagram VCC_ON VCC pullup disabled All Output Buffer enabled VCC BUCK power mode control VCC_UVL = 1 when VCC < VCCuvl VCC_UV = 1 when VCC < VCCuv VCC_OV = 1 when VCC > VCCov DIS_VCOREMON = VCCSEL > Vth1_vccsel SATBUCK_OK = 1 when SATBUCK > Vsatbck_ok VCCGND_loss =1 OR VCORE_OV =1 OR VCC_OV = 1 OR [(VCC_UV=1 OR VCC_UVL=1) AND T1 timeout)] SLEEP_MODE OR POWER-OFF_MODE T1 timeout AND VCC_UVL = 0 AND VCC_UV = 0 VCCGND_loss = 0 AND SATBUCK_OK = 1 All Ouput Buffer disabled VCC pull-up disabled VCC_OFF VCC pull-up enabled Start T1 4ms VCC_rampup VCCGND_loss =1 OR VCC_OV =1 OR VCC_UVL =1 (VCORE_UV =1 AND DIS_VCOREMON =0) OR VCORE_OV =1 T2 timeout (Buck is not running) VCC pull-up disabled Start T2 5ms VCC_SHUTDOWN GAPGPS02270 |
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