Datasheet

MAX845
Isolated Transformer Driver
for PCMCIA Applications
_______________________________________________________________________________________ 3
40
-20 60
OUTPUT RESISTANCE vs. TEMPERATURE
30
MAX845-01
TEMPERATURE (°C)
OUTPUT RESISTANCE (Ω)
20 100
20
15
10
35
25
-40 0 8040
V
IN
= 4.5V
V
IN
= 5.5V
FIGURE 11c
7.5
2.5
-20 60
OUTPUT RESISTANCE vs. TEMPERATURE
3.5
6.0
MAX845-02
TEMPERATURE (°C)
OUTPUT RESISTANCE (Ω)
20 100
5.0
4.5
3.0
4.0
7.0
6.5
5.5
-40 0 8040
FIGURE 11b
1.6
1.4
1.2
0.2
-20 60
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX845-03
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
20 100
0.6
1.0
-40 0 8040
0.8
0.4
SD = V
CC
1000
950
600
-20 60
D1, D2 FREQUENCY vs. TEMPERATURE
MAX845-04
TEMPERATURE (°C)
FREQUENCY (kHz)
20 100
750
900
850
-40 0 8040
800
700
650
V
IN
= 5.5V
V
IN
= 4.5V
V
IN
= 5.0V
V
IN
= 6.0V
90
100
0
60
140 160
EFFICIENCY vs. LOAD CURRENT
20
70
MAX845-07
LOAD CURRENT (mA)
EFFICIENCY (%)
20 100
50
40
10
30
80
60
0
8040
120
FIGURE 11b
FIGURE 11c
850
800
500
550
-20 60
D1, D2 FREQUENCY vs. TEMPERATURE
MAX845-05
TEMPERATURE (°C)
FREQUENCY (kHz)
20 100
650
750
-40
0 8040
700
600
FS HIGH
V
IN
= 5.0V
FS LOW
1.5
1.4
0.8
-20 60
SUPPLY CURRENT vs. TEMPERATURE
MAX845-06
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
20 100
1.0
-40 0 8040
0.9
1.1
1.3
1.2
1.7
1.6
V
IN
= 4.5V
V
IN
= 5.0V
V
IN
= 5.5V
V
IN
= 6.0V
7.5
2.5
0 40
OUTPUT VOLTAGE vs. LOAD CURRENT
3.5
6.5
MAX845-08
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
80
5.5
4.5
3.0
4.0
7.0
6.0
5.0
20 60 140120100 160
TRANSFORMERS
USED IN FIGURE 11b
TGM-010P3
TGM-030P3
TGM-020P3
15
5
0 40
OUTPUT VOLTAGE vs. LOAD CURRENT
7
13
MAX845-09
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
80
11
9
6
8
14
12
10
20 60 140120100 160
TRANSFORMERS
USED IN FIGURE 11c
TGM-010P3
TGM-030P3
TGM-020P3
__________________________________________Typical Operating Characteristics
( Typical Operating Circuit , V
IN
= 5V, C1 = 0.1µF, C2 = C3 = 0.33µF, T1 = Halo TGM-010P3, CR1 = CR2 = MBR0520, FS = V
CC
,
T
A
= +25°C, unless otherwise noted.)