MAX1606 Datasheet, PDF (5/10 Pages) Maxim Integrated Products – 28V Internal Switch LCD Bias Supply with True Shutdown

28V Internal Switch LCD Bias Supply
with True Shutdown
Typical Operating Characteristics (continued)
(V_CC = 3.3V, V_BATT = 3.6V, L1 = 10µH, SHDN = LIM = V_CC, V_OUT(NOM) = 18V (Figure 3), T_A = +25°C, unless otherwise noted.)
EFFICIENCY vs. SUPPLY VOLTAGE
100
I_OUT = 5mA
90
80
70
I_OUT = 1mA
60
50
L1 = 10µH, LIM = V_CC
L1 = 100µH, LIM = OPEN
40
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_CC (V)
EFFICIENCY vs. BATTERY VOLTAGE
100
I_OUT = 5mA
90
80
70
60
I_OUT = 1mA
50
40
30
L1 = 10µH, LIM = V_CC
L1 = 100µH, LIM = OPEN
20
0123456
V_BATT (V)
EFFICIENCY vs. LOAD CURRENT
(L1 = 10µH)
100
90
LIM = V_CC
80
70
60
LIM = OPEN
LIM = GND
50
40
0
5
10
15
20
25
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(L1 = 47µH)
100
90
LIM = OPEN
LIM = V_CC
80
70
LIM = GND
60
50
EFFICIENCY vs. LOAD CURRENT
(L1 = 100µH)
100
LIM = OPEN
90
80
70
LIM = GND
LIM = V_CC
60
50
PEAK INDUCTOR CURRENT LIMIT
vs. SUPPLY VOLTAGE
600
V_BATT = 3.6V
500
LIM = V_CC
400
300
LIM = OPEN
200
LIM = GND
100
40
0
5 10 15 20 25 30
LOAD CURRENT (mA)
PEAK INDUCTOR CURRENT LIMIT
vs. BATTERY VOLTAGE
600
V_CC = 3.3V
500
LIM = V_CC
400
300
LIM = OPEN
200
LIM = GND
100
0
0.5 1.5 2.5 3.5 4.5 5.5
V_BATT (V)
40
0
180
160
140
120
100
80
60
40
20
0
0
5 10 15 20 25 30
LOAD CURRENT (mA)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1
2
34
5
V_CC (V)
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_CC (V)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
SUPPLY CURRENT
vs. LOAD CURRENT
LIM = GND
(125mA)
LIM = OPEN
(250mA)
LIM = V_CC
(500mA)
5
10
15
20
25
LOAD CURRENT (mA)
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