LTC3450 Datasheet, PDF (4/12 Pages) Linear Technology – Triple Output Power Supply for Small TFT-LCD Displays

LTC3450
TYPICAL PERFOR A CE CHARACTERISTICS ^(TA ^{= 25°C unless otherwise noted)}
AV_DD Efficiency vs V_IN
100
L = 100µH
95
90
10mA
5mA
2mA
85
80
75
70
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V_IN (V)
3450 G02
AV_DD Efficiency vs V_IN
100
L = 47µH
95
10mA
90
5mA
85
2mA
80
75
70
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V_IN (V)
3450 G03
No Load V_IN Current in Blank Mode
100
90
80
70
60
50
40
30
20
10
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3450 G04
No Load V_IN Current in Scan Mode
800
700
600
500
400
300
200
100
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3450 G05
V_GH vs Load
15.6
15.4
15.2
15.0
14.8
14.6
14.4
0 100 200 300 400 500 600 700 800 900 1000
V_GH LOAD (µA)
3450 G07
V_GL vs Load
– 9.0
– 9.2
– 9.4
– 9.6
– 9.8
– 10.0
– 10.2
– 10.4
0 100 200 300 400 500 600 700 800 900 1000
V_GL LOAD (µA)
3450 G08
AV_DD vs V_IN and Load
5.16
5.14
0mA
5.12 _2mA
5.10
5mA
5.08
10mA
5.06
5.04
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V_IN (V)
3450 G06
AV_DD vs Temperature
Figure 1 Circuit, 1mA Load
5.200
5.175
5.150
5.125
5.100
5.075
5.050
5.025
5.000
– 40 – 25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3450 G09
3450f
4