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L9961 数据表(PDF) 13 Page - STMicroelectronics |
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L9961 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 65 page  Symbol Parameter Test conditions Min. Typ. Max. Unit TMCU2STBY Maximum delay from sending GO2STBY command to MCU in low power mode Application info 1 ms TGO2STBY Maximum delay from receival of GO2STBY command to L9961 in STANDBY state Application info 2 4 ms TGO2SHIP Time delay for L9961 from received GO2SHIP command from MCU to enter SHIPMENT - DEEP SLEEP state Application info 0 10 ms IWAKEMAX VREG current capability in STANDBY to NORMAL state transition, during TWAKEMAX interval Application info 15 mA TWAKEMAX MCU time in NORMAL mode to send a WAKEUP command to L9961 Application info 1 ms TSTBY2NORMAL Time to complete STANDBY to NORMAL transition From WAKEUP assertion to VREG_UV release 1 ms TSHIP2NORMAL Time to complete SHIPMENT - DEEP SLEEP to normal transition From NSHIP assertion to VREG UV release. No load on VREG, 4.7uF capacitance present. 5 ms TI2C_READY I2C settling time From WAKEUP/NSHIP assertion to I2C ready 15 ms TCP_STARTUP Charge pump startup time From VREG_UV release (TVREG_UV_BLK expired) to VCP in range 8 ms 3.3 VREG LDO L9961 provides a system regulator capable of providing power to the system MCU and other peripheral devices or circuits. Performances of the regulator vary according to L9961 state: • In STANDBY State, the regulated voltage is VVREG_STBY and average current capability is limited to IVREG_STBY. Line/load regulation performances are reduced to VVREG_LIN_REG_STBY and VVREG_LOAD_REG_STBY respectively. VREG current limit is still active with a IVREG_CURR_LIM_STBY threshold • In NORMAL State, the regulated voltage is VVREG_NORM, with a IVREG_NORM average current capability. Line/load regulation performances are defined by VVREG_LIN_REG_NORM and VVREG_LOAD_REG_NORM respectively. VREG current limit is active with a IVREG_CURR_LIM threshold. 3.3.1 Electrical parameters All parameters are tested and guaranteed in the following conditions, unless otherwise noted: VB according to the operating range of Table 2; TJ according to the operating range of Table 5. Table 8. VREG electrical parameters Symbol Parameter Test conditions Min. Typ. Max. Unit VVREG_NORM Regulated voltage NORMAL state 10 μA<Iload<30 mA 3.23 3.3 3.37 V IVREG_NORM Current load range NORMAL state Design info 0.01 35 mA IVREG_CURR_LIM Current limitation NORMAL state VREG=2.7 V 40 mA IVREG_CURR_LIM_STBY Current limitation STANDBY state VREG=2.6 V 15 85 mA L9961 VREG LDO DS14012 - Rev 3 page 13/65 |
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