Re g u la t e d , 1 2 5 m A-Ou t p u t ,
Ch a rg e -P u m p DC-DC In ve rt e r
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
= 22µF, T = +25°C, unless otherwise noted.)
OUT A
(Circuit of Figure 1, V = +5V, C
IN
= 2.2µF, C
FLY
OUTPUT RIPPLE
vs. LOAD CURRENT (LIN MODE)
OUTPUT RIPPLE
vs. LOAD CURRENT (SKIP MODE)
OUTPUT VOLTAGE
vs. LOAD CURRENT
-3.08
-3.07
-3.06
-3.05
-3.04
-3.03
-3.02
-3.01
-3.00
-2.99
-2.98
140
120
100
80
250
200
150
100
50
C
OUT
C
FLY
=
C
= 10µF
OUT
C
= 10µF
10
OUT
SKIP MODE
MAX1673
C
OUT
= 22µF
C
OUT
= 22µF
= 47µF
60
C
OUT
= 47µF
40
C
OUT
LIN MODE
125
20
C
OUT
C
=
FLY
10
0
0
0
25
50
75
100
125
150
0
25
50
75
100
125
150
0
25
50
75
100
150
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(LIN MODE)
EFFICIENCY vs. LOAD CURRENT
(SKIP MODE)
EFFICIENCY vs. INPUT VOLTAGE
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
V = 4V
IN
V
= 3.5V
IN
V
= 4.5V
IN
V
= 4V
IN
V
= 5V
IN
SKIP MODE
LIN MODE
V
= 5V
IN
V
≠ V
IN
REF
100mA LOAD
= -3V
V
V
≠ V
IN
V
REF
≠ V
IN
OUT
REF
CIRCUIT OF FIGURE 4
CIRCUIT OF FIGURE 4
80 100 120 140
LOAD CURRENT (mA)
CIRCUIT OF FIGURE 4
20 40 60
LOAD CURRENT (mA)
0
20
40
60
0
80 100 120 140
3.5 4.0 4.5
5.0
(V)
5.5
6.0
V
IN
DROPOUT OUTPUT RESISTANCE
vs. INPUT VOLTAGE
QUIESCENT CURRENT vs. INPUT VOLTAGE
(LIN MODE)
QUIESCENT CURRENT vs. INPUT VOLTAGE
(SKIP MODE)
12
10
8
12
10
8
45
40
35
30
25
20
15
10
5
DOES NOT INCLUDE BIAS CURRENT
FOR RESISTOR DIVIDER
DOES NOT INCLUDE BIAS CURRENT
FOR RESISTOR DIVIDER
T = +25°C
A
T = +85°C
A
6
6
4
4
2
2
T = -40°C
A
V
REF
≠ V
IN
CIRCUIT OF FIGURE 4
0
0
0
2
3
4
5
6
2
3
4
5 6
2
3
4
5
6
V
IN
(V)
V (V)
IN
V
IN
(V)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
