1.5µA I , Step-Up DC-DC Converters
Q
in Thin SOT23-5
Typical Operating Characteristics
(Figure 3 (MAX1723), Figure 7 (MAX1722), Figure 8 (MAX1724), V
unless otherwise noted.)
= V = 1.5V, L = 10µH, C = 10µF, C
= 10µF, T = +25°C,
A
BATT
IN
IN
OUT
EFFICIENCY vs. LOAD CURRENT
(V = 5.0V)
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
(V = 3.3V)
(V
= 2.5V)
OUT
OUT
OUT
100
90
100
100
V
IN
= 3.3V
V = 4.0V
IN
V
IN
= 2.5V
V
= 2.0V
IN
V
IN
= 2.0V
90
80
90
80
V
IN
= 2.0V
80
70
60
V = 1.5V
IN
70
60
50
70
60
V
IN
= 1.0V
V
IN
= 1.0V
V
IN
= 1.5V
1
V
IN
= 1.0V
10
L = DO1606
100 1000
V
IN
= 1.5V
1
L = DO1606
100 1000
L = DO1606
100 1000
50
50
0.01
0.1
10
0.01
0.1
1
0.01
0.1
10
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
QUIESCENT CURRENT INTO OUT
vs. OUTPUT VOLTAGE
STARTUP VOLTAGE
vs. LOAD CURRENT
2.0
2.4
200
RESISTIVE LOAD
V = 5.0V
OUT
NO LOAD
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2.2
V
= 2.5V
OUT
160
120
80
40
0
2.0
1.8
1.6
1.4
1.2
V
OUT
= 5.0V
V
OUT
= 3.3V
1.0
0.8
0.6
0
1
2
3
4
5
0.01
0.1
1
10
100
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
STARTUP VOLTAGE vs.
TEMPERATURE
SWITCHING WAVEFORMS
1.2
1.0
0.8
0.6
0.4
0.2
NO LOAD
I
LX
500mA/div
V
OUT
50mV/div
V
LX
2V/div
0
1µs/div
-40
-15
10
35
60
85
I
= 50mA, V = 5.0V, V = 3.3V
OUT IN
TEMPERATURE (°C)
OUT
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
