an8049sh Panasonic Corporation of North America, an8049sh Datasheet - Page 21

• Manufacturer Part Number: an8049sh
• Description: 1.8-volt 3-channel Step-up, Step-down, And Polarity Inverting Dc-dc Converter Control Ic
• Manufacturer: Panasonic Corporation of North America

I Application Notes (continued)
[9] Sequential operation
Sequential operation under the control of external capacitors
Delays can be provided in the startup times by inserting capacitors (C
Delay time: t
C
CTL3
C
CTL1
AN8049SH
< C
DLY
C
CTL2
CTL2
= 1.26 (V) × C
< C
Figure 8. Sequential operation using external capacitors
CTL3
C
CTL1
CTL
ch.1
ch.2
ch.3
(µF)/1.1 (µA)
V
1.26 V
U.V.L.O. cleared
CTL
SDH00012BEB
≈ V
CC
Stop
Stop
Stop
(s)
CTL1
CTL
CTL2
) between the CTL pins and ground.
CTL3
Start
Start
Start
AN8049SH
21