MAX868 Maxim, MAX868 Datasheet - Page 4

• Manufacturer Part Number: MAX868
• Description: Regulated / Adjustable -2x Inverting Charge Pump
• Manufacturer: Maxim

20mV/div
Regulated, Adjustable -2x
Inverting Charge Pump
(Circuit of Figure 5, T
4
____________________________Typical Operating Characteristics (continued)
200
180
160
140
120
100
80
70
60
50
40
30
20
10
80
60
40
20
_______________________________________________________________________________________
0
0
0.01
-40
V
V
IN
OUT
OPEN-LOOP OUTPUT IMPEDANCE
= 3.3V, V
EFFICIENCY vs. LOAD CURRENT
-20
AC COUPLED (20mV/div), C
OUTPUT VOLTAGE RIPPLE
(C
(FB = IN, V
0.1
OUT
vs. TEMPERATURE
OUT
0
LOAD CURRENT (mA)
TEMPERATURE (°C)
= 10 F TANTALUM)
V
= -3.3V, I
IN
(V
A
20
= 2V
20 s/div
IN
= +25°C, unless otherwise noted.)
OUT
V
1
= 5V)
IN
V
V
LOAD
= 3.3V
40
OUT
IN
V
= -2 x V
V
OUT
= 5V
OUT
= -7.5V
= 5mA,
= -5V
OUT
60
= -3.3V
10
IN
= 10 F (AVX TPS)
)
80
100
100
20mV/div
200
180
160
140
120
100
80
60
40
20
80
70
60
50
40
30
20
10
0
0
0.01
-40
V
V
OUT
IN
= 3.3V, V
CIRCUIT OF FIGURE 6
OPEN-LOOP OUTPUT IMPEDANCE
AC COUPLED (20mV/div), C
EFFICIENCY vs. LOAD CURRENT
-20
OUTPUT VOLTAGE RIPPLE
(C
OUT
0.1
(FB = IN, V
OUT
vs. TEMPERATURE
0
LOAD CURRENT (mA)
TEMPERATURE (°C)
= 10 F CERAMIC)
= -3.3V, I
(V
20 s/div
20
IN
= 3.3V)
V
1
LOAD
OUT
IN
V
40
IN
= 2V
V
V
= 3.3V
= 5mA,
OUT
= -V
OUT
OUT
V
= -3.3V
IN
60
= -5V
IN
= 10 F CERAMIC
10
= 5V
)
80
100
100
20mV/div
10mA/div
20mV/div
80
70
60
50
40
30
20
10
0
0.01
V
V
V
CIRCUIT OF FIGURE 6
IN
OUT
IN
EFFICIENCY vs. LOAD CURRENT
= 5V, V
= 3.3V, V
AC COUPLED (20mV/div), C
LOAD-TRANSIENT RESPONSE
OUTPUT VOLTAGE RIPPLE
0.1
OUT
LOAD CURRENT (mA)
OUT
= -5V, I
= -3.3V, I
(V
200 s/div
IN
20 s/div
OUT
1
= 5V)
V
LOAD
OUT
= 1mA TO 11mA STEP
V
OUT
= -3.3V
= 5mA,
= -2.5V
OUT
10
= 2.2 F CERAMIC
100