Application Notes
ATH Series of Wide-Output Adjust Power
Modules (3.3/5-V Input)
Figure 3-4; Sequenced Power Up & Power Down Using Auto-Track
U1
10
9
8
5
Track
Vo1 =3.3V
2
6
ATH22T05-9SJ
PTH05020W
VIN
VO
+5V
+
+
Inhibit
3
GND
1
7
4
CIN
COUT
R2
698
C1
0.047µF
U2
10
9
8
5
On/Off Control
Q1
Track
1
0
= Power Down
= Power Up
BSS138
R1
Vo2 =2V
2
6
100k
ATH15T05-9SJ
PTH05010W
VIN
VO
+
+
Inhibit
3
GND
1
7
4
CIN
COUT
R3
0V
4k12
Figure 3-5; Simultaneous Power Up with Auto-Track Control
Figure 3-6; Simultaneous Power Down with Auto-Track Control
Vo1 (1V/Div)
Vo1 (1V/Div)
Vo2 (1V/Div)
Vo2 (1V/Div)
On/Off Control
(5V/Div)
On/Off Input
(5V/Div)
HORIZ SCALE: 5ms/Div
HORIZ SCALE: 5ms/Div
North America (USA): 1-888-41-ASTEC
Europe (UK): 44(1384)842-211
Asia (HK): 852-2437-9662
ASTEC [ Astec America, Inc ]
