MAX1620 Datasheet, PDF (6/20 Pages) Maxim Integrated Products – Digitally Adjustable LCD Bias Supplies

Digitally Adjustable LCD Bias Supplies
_____________________________Typical Operating Characteristics (continued)
(V_DD = 5V, V_BATT = 10V, L1 = 100µH, T_A = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT VOLTAGE
1.00
0.95
0.90
-20mA
0.85
-10mA
0.80
0.75
0.70
-26 -24 -22 -20 -18 -16 -14 -12
OUTPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
200
175
150
125
100
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
EFFICIENCY vs. V_BATT
1.00
0.95
+20V, +10mA
0.90
0.85
-20V, -10mA
0.80
0.75
0.70
2 4 6 8 10 12 14 16 18 20
V_BATT (V)
20
18
16
14
12
10
8
6
4
2
0
0
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1
2
3
4
5
SUPPLY VOLTAGE (V)
200
180
160
140
120
100
80
60
40
20
0
0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1
2
3
4
5
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
20
18
16
14
12
10
8
6
-40 -20 0
20 40
60 80
TEMPERATURE (°C)
REFERENCE VOLTAGE
vs. TEMPERATURE
1.51
1.50
1.49
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
k-FACTOR vs. SUPPLY VOLTAGE
22.0
21.5
21.0
20.5
20.0
19.5
19.0
18.5
18.0
2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
k-FACTOR vs. TEMPERATURE
22.0
21.5
21.0
20.5
20.0
19.5
19.0
18.5
18.0
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
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