Datasheet PI4ULS3V4857 (Diodes) - 7

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PI4ULS3V4857 Dynamic Characteristics Voltage Regulator
(Tamb = 25oC; unless otherwise specified.)
Symbol Parameter Conditions Min. Typ. Max. Units Voltage Regulator Output Pin: VCCB
tstartup(LDO) Regulator start-up time VCCA = 1.8V; VSD = 3.0V; Cext = 2.2μF; see Figure 2 400 μs tf(o) Output fall time VO(LDO) = 3.0V to 1.8V; SEL = LOW to HIGH; see Figure 1 1 ms tr(o) Output rise time VO(LDO) = 1.8V to 3.0V; SEL = HIGH to LOW; see Figure 5 100 μs VSD VSD CLK_SD 0V VSD VSD CMD 0V VSD VSD DATA[3:0] 0V SEL 0V 0V tf(o) tr(o) VSD V VSD LDO 1.8V
Figure 1. Regulator Mode Change Timing
VSD VSD GND tstartup(reg) VO(reg) Regulator Output 0V
Figure 2. Regulator Start-up Time
PI4ULS3V4857 www.diodes.com August 2020 Document Number DS42310 Rev 2-2 7 Diodes Incorporated