MAX864 Maxim, MAX864 Datasheet - Page 3

• Manufacturer Part Number: MAX864
• Description: Dual-Output Charge Pump with Shutdown
• Manufacturer: Maxim

(V
__________________________________________Typical Operating Characteristics
IN
100
-10
90
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
10
= 5.0V, capacitor values in Table 1, T
-2
-4
-6
-8
0
8
6
4
2
0
0
0
0
0
EFFICIENCY vs. OUTPUT CURRENT
EFFICIENCY vs. OUTPUT CURRENT
BOTH V+ AND
V- LOADED EQUALLY
V
5
5
@ 185kHz PUMP FREQUENCY
IN
5
@ 7kHz PUMP FREQUENCY
C1–C4 = 1 F
FC1 = 1, FC0 = 1
C1–C4 = 33 F
FC1 = 0, FC0 = 0
= 3.3V
OUTPUT CURRENT (mA)
10
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
V
10
10
Dual-Output Charge Pump with Shutdown
IN
OUTPUT VOLTAGE
= 3.3V
V
15
IN
_______________________________________________________________________________________
15
15
= 5.0V
V+
20
V
20
20
IN
V- LOADED
V- LOADED
C1–C4 = 1 F
V
FC1 = 1
FC0 = 1 (185kHz)
25
= 5.0V
IN
V+ LOADED
25
25
= 4.75V
V+ LOADED
V-
V+
30
V-
30
30
35
V+
V-
V+
V-
35
35
40
A
= +25°C, unless otherwise noted.)
140
120
160
100
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
80
60
90
80
70
60
50
40
30
20
10
40
0
0
OUTPUT CURRENT vs. PUMP CAPACITANCE
1.0
0
0
EFFICIENCY vs. OUTPUT CURRENT
5
(V
f = 7kHz
5
@ 33kHz PUMP FREQUENCY
2.0
10 15
V
IN
C1–C4 = 6.8 F
FC1 = 0, FC0 = 1
f = 33kHz
PUMP CAPACITANCE ( F)
IN
vs. SUPPLY VOLTAGE
OUTPUT CURRENT (mA)
OUTPUT RESISTANCE
= 1.9V, V+ + V- = 6V)
SUPPLY VOLTAGE (V)
= 5.0V
10
R
OUT+
3.0
20
R
f = 185kHz
15
OUT-
25
C1 = C2 = C3 = C4
20
4.0
30
FC1 = 1, FC0 = 1
(185kHz @ 5V)
35
25
f = 100kHz
V-
V+
V
5.0
40 45
IN
= 3.3V
30
V+
V-
6.0
50
35
125
110
140
80
70
60
50
40
30
20
10
95
80
65
50
35
0
9
8
7
6
5
4
3
2
1
0
OUTPUT CURRENT vs. PUMP CAPACITANCE
-55 -35 -15
0
0
V
EFFICIENCY vs. OUTPUT CURRENT
IN
V+, V
5
f = 7kHz
(V
= 3.3V
@ 100kHz PUMP FREQUENCY
5
C1–C4 = 2.2 F
FC1 = 0, FC0 = 0
f = 33kHz
IN
10 15
f = 100kHz
IN
PUMP CAPACITANCE ( F)
OUTPUT CURRENT (mA)
= 3.15V, V+ + V- = 10V)
OUTPUT RESISTANCE
V
10
= 3.0V
IN
vs. TEMPERATURE
V-, V
TEMPERATURE (°C)
= 5.0V
5
20
15
IN
25
= 4.5V
25
V-, V
20
45 65
C1 = C2 = C3 = C4
30
IN
V+, V
= 3.0V
V+
25
35
f = 185kHz
V-
IN
85 105
40 45
= 4.5V
30
V+
V-
35
125
50
3