Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX1676 User Manual
Page 4
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
4
_______________________________________________________________________________________
Typical Operating Characteristics
(L = 22µH, C
IN
= 47µF, C
OUT
= 47µF
0.1µF, C
REF
= 0.1µF, T
A
= +25°C, unless otherwise noted.)
V
LBO
= 5.5V, V
LBI
= 5.5V
V
SHDN
= 0 or V
OUT
MAX1676, CLSEL = OUT
CONDITIONS
µA
1
I
LBO
LBO Off Leakage Current
nA
75
I
SHDN
SHDN Input Current
µA
3
I
CLSEL
CLSEL Input Current
UNITS
MIN
MAX
SYMBOL
PARAMETER
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 2V, FB = OUT, R
L
=
∞, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 4)
Note 1: Start-up voltage operation is guaranteed with the addition of a Schottky MBR0520 external diode between the input and
output.
Note 2: Steady-state output current indicates that the device maintains output voltage regulation under load. See Figures 5 and 6.
Note 3: Device is bootstrapped (power to the IC comes from OUT). This correlates directly with the actual battery supply.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
100
0
0.01
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
20
30
10
MAX1674 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
40
50
60
70
90
80
V
IN
= 1.2V
V
OUT
= 5V
I
LIMIT
= 500mA
V
IN
= 2.4V
V
IN
= 3.6V
100
0
0.01
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
20
30
10
MAX1674 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
40
50
60
70
90
80
V
IN
= 1.2V
V
OUT
= 5V
I
LIMIT
= 1A
V
IN
= 2.4V
V
IN
= 3.6V
100
0
0.01
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
20
30
10
MAX1674 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
40
50
60
70
90
80
V
IN
= 1.2V
V
OUT
= 3.3V
I
LIMIT
= 500mA
V
IN
= 2.4V
100
0
0.01
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
20
30
10
MAX1674 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
40
50
60
70
90
80
V
IN
= 1.2V
V
OUT
= 3.3V
I
LIMIT
= 1A
V
IN
= 2.4V
1.290
1.292
1.296
1.294
1.298
1.300
-40
0
-20
20
40
60
80
100
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1674 toc05
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
I
REF
= 0
I
REF
= 100
µA