High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
MAX1674/MAX1675/MAX1676
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 2V, FB = OUT, R
L
=
∞,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 4)
PARAMETER
CLSEL Input Current
SHDN
Input Current
LBO
Off Leakage Current
SYMBOL
I
CLSEL
I
SHDN
I
LBO
CONDITIONS
MAX1676, CLSEL = OUT
V
SHDN
= 0 or V
OUT
V
LBO
= 5.5V, V
LBI
= 5.5V
MIN
MAX
3
75
1
UNITS
µA
nA
µA
Note 4:
Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(L = 22µH, C
IN
= 47µF, C
OUT
= 47µF
0.1µF, C
REF
= 0.1µF, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc01
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc02
EFFICIENCY vs. LOAD CURRENT
90
80
EFFICIENCY (%)
70
60
50
40
30
20
V
IN
= 2.4V
V
IN
= 1.2V
MAX1674 toc03
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
V
OUT
= 5V
I
LIMIT
= 500mA
100
V
IN
= 3.6V
V
IN
= 2.4V
V
IN
= 1.2V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
LOAD CURRENT (mA)
V
OUT
= 5V
I
LIMIT
= 1A
100
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
100
10
0
0.01
0.1
1
10
V
OUT
= 3.3V
I
LIMIT
= 500mA
100
1000
1000
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc04
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1674 toc05
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
LOAD CURRENT (mA)
V
OUT
= 3.3V
I
LIMIT
= 1A
100
V
IN
= 1.2V
V
IN
= 2.4V
1.300
REFERENCE OUTPUT VOLTAGE (V)
1.298
I
REF
= 0
1.296
1.294
I
REF
= 100µA
1.292
1.290
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
1000
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
