Regulated 5V Charge-Pump
DC-DC Converter
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT
AND INPUT VOLTAGE
90
85
V
IN
= 1.8V
V
IN
= 3.0V
200
180
160
140
MAX619
INPUT CURRENT vs. OUTPUT CURRENT
D
E
C
I
IN
(µA)
B
V
IN
I
OUT
MAX
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
1000
G
F
SHDN = 0V
100
EFFICIENCY (%)
80
I
IN
(mA)
V
IN
= 2.0V
75
V
IN
= 3.3V
70
65
V
IN
= 2.7V
60
1
10
I
OUT
(mA)
100
V
IN
= 3.6V
V
IN
= 2.4V
120
100
80
60
40
20
0
10
A
A
B
C
D
E
F
G
1.8
2.0
2.4
2.7
3.0
3.6
3.3
18
36
41
64
72
94
100
1.0
0.1
0.01
1.5
2.0
SHDN = V
IN
2.5
3.0
3.5
4.0
4.5
0 10 20 30 40 50 60 70 80 90 100
I
OUT
(mA)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
5.06
90
V
IN
(V)
EFFICIENCY vs. INPUT VOLTAGE
I
OUT
= 10mA
OUTPUT VOLTAGE vs. OUTPUT CURRENT
5.05
V
IN
= 3.3V
5.00
4.95
4.90
4.85
4.80
4.75
1
10
100
V
IN
= 1.8V
V
IN
= 2.0V
V
IN
= 2.4V, 2.7V
V
IN
= 3.0V
= 3.6V
V
IN
= 3.6V
5.04
5.02
85
EFFICIENCY (%)
I
OUT
= 20mA
V
OUT
(V)
80
75
70
65
60
V
OUT
(V)
5.00
4.98
4.96
4.94
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
1.5
2.0
2.5
3.0
3.5
4.0
I
OUT
(mA)
V
IN
(V)
V
IN
(V)
LOAD-TRANSIENT RESPONSE
LINE-TRANSIENT RESPONSE (I
OUT
= 20mA)
2ms/div
TOP TRACE: OUTPUT CURRENT, 0mA to 25mA, 10mA/div
BOTTOM TRACE: OUTPUT VOLTAGE, 5mV/div, AC-COUPLED
2ms/div
R
LOAD
= 250Ω, V
OUT
= 5V, I
OUT
= 20mA
TOP TRACE: V
IN
= 2V to 3V, 1V/div
BOTTOM TRACE: OUTPUT VOLTAGE, 50mV/div, AC-COUPLED
________________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
