4.6 Idd Curves
Cx = 5pF, Cs = 4.7nF, Ta = 20oC, Spread spectrum circuit (see Fig. 1.1).
QT1101 Idd (norm al m ode) m A
5.0
4.0
3.0 Rb1=12K
Rb2=22K
2.0
Rb1=15K
Rb2=27K
1.0 Rb1=12K
Rb2=27K
0.0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (120m s response) µA
700
600
500
400 Rb1=12K
300 Rb2=22K
Rb1=15K
Rb2=27K
200
100 Rb1=12K
Rb2=27K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (200m s response) µA
400
300
Rb1=12K
200 Rb2=22K
Rb1=15K
Rb2=27K
100 Rb1=12K
Rb2=27K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (360m s response) µA
300
250
200 Rb1=12K
150 Rb2=22K
Rb1=15K
Rb2=27K
100
Rb1=12K
50 Rb2=27K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
Cx = 5pF, Cs = 4.7nF, Ta = 20oC, No spread spectrum circuit (see Fig. 1.1).
QT1101 Idd (norm al m ode) m A
5.0
4.0
3.0
Rb1=20K
2.0
Rb1=18K
1.0 Rb1=15K
0.0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (120m s response) µA
600
500
400
300
Rb1=20K
200
100
Rb1=18K
Rb1=15K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (200m s response) µA
300
250
200
150
Rb1=20K
100
Rb1=18K
50
Rb1=15K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
QT1101 Idd (360m s response) µA
150
125
100
75
Rb1=20K
50
Rb1=18K
25
Rb1=15K
0
2.5 3 3.5 4 4.5 5 5.5
Vdd(V)
lQ
12
QT1101 R4.06/0806