Datasheet

MAX1722/MAX1723/MAX1724
1.5µA I
Q
, Step-Up DC-DC Converters in TSOT
4
Maxim Integrated
Typical Operating Characteristics
(Figure 3 (MAX1723), Figure 7 (MAX1722), Figure 8 (MAX1724), V
BATT
= V
IN
= 1.5V, L = 10µH, C
IN
= 10µF, C
OUT
= 10µF, T
A
= +25°C,
unless otherwise noted.)
0
40
120
80
160
200
021345
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1722 toc04
INPUT VOLTAGE (V)
I
OUT(MAX)
(mA)
V
OUT
= 2.5V
V
OUT
= 5.0V
V
OUT
= 3.3V
10 100
0.8
1.0
1.2
1.4
1.6
2.0
1.8
2.2
2.4
0.01 0.1 1
STARTUP VOLTAGE
vs. LOAD CURRENT
MAX1722 toc05
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
0.6
RESISTIVE LOAD
V
OUT
= 5.0V
0
0.4
0.2
0.8
0.6
1.2
1.0
1.4
1.8
1.6
2.0
1.0 2.0 2.5 3.01.5 3.5 4.0 4.5 5.0 5.5
MAX1722 toc06
QUIESCENT CURRENT (μA)
OUTPUT VOLTAGE (V)
QUIESCENT CURRENT INTO OUT
vs. OUTPUT VOLTAGE
NO LOAD
100
0.01 0.1 1 10 100 1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 5.0V)
MAX1722 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
60
80
50
70
90
V
IN
= 2.0V
V
IN
= 3.3V V
IN
= 4.0V
V
IN
= 1.5V
V
IN
= 1.0V
L = DO1606
100
0.01 0.1 1 10 100 1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
MAX1722 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
60
80
50
70
90
V
IN
= 2.0V
V
IN
= 2.5V
V
IN
= 1.5V
V
IN
= 1.0V
L = DO1606
100
0.01 0.1 1 10 100 1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 2.5V)
MAX1722 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
60
80
50
70
90
V
IN
= 1.5V
V
IN
= 2.0V
V
IN
= 1.0V
L = DO1606
0
0.4
0.2
0.8
0.6
1.0
1.2
-40 85
STARTUP VOLTAGE vs.
TEMPERATURE
MAX1722 toc07
TEMPERATURE (°C)
STARTUP VOLTAGE (V)
10-15 35 60
NO LOAD
1μs/div
I
LX
500mA/div
V
OUT
50mV/div
V
LX
2V/div
SWITCHING WAVEFORMS
MAX1722 toc08
I
OUT
= 50mA, V
OUT
= 5.0V, V
IN
= 3.3V