Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
BATT
= 2V, FB = OUT (V
OUT
= 3.3V), R
L
= ˙∞,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Minimum Input Voltage
Operating Voltage
Start-Up Voltage
Start-Up Voltage Tempco
Output Voltage
Output Voltage Range
FB = OUT
(V
OUT
= 3.3V)
Steady-State Output Current
(Note 2)
I
OUT
FB = GND
(V
OUT
= 5V)
Reference Voltage
Reference Voltage Tempco
Reference Voltage Load
Regulation
Reference Voltage Line
Regulation
FB, LBI Input Threshold
Internal NFET, PFET
On-Resistance
LX Switch Current
Limit (NFET)
LX Leakage Current
R
DS(ON)
I
LIM
I
LEAK
I
LX
= 100mA
MAX1674, MAX1676 (CLSEL = OUT)
MAX1675, MAX1676 (CLSEL = GND)
V
LX
= 0, 5.5V; V
OUT
= 5.5V
0.80
0.4
V
REF
TEMPCO
V
REF_LOAD
V
REF_LINE
I
REF
= 0 to 100µA
V
OUT
= 2V to 5.5V
1.274
I
REF
= 0
MAX1674,
MAX1676 (CLSEL = OUT)
MAX1675,
MAX1676 (CLSEL = GND)
MAX1674,
MAX1676 (CLSEL = OUT)
MAX1675,
MAX1676 (CLSEL = GND)
V
OUT
FB = OUT
FB = GND
3.17
4.80
2
300
150
180
90
1.274
420
220
mA
285
130
1.30
0.024
3
0.08
1.30
0.3
1
0.5
0.05
15
2.5
1.326
0.6
1.20
0.65
1
1.326
V
mV/°C
mV
mV/V
V
Ω
A
µA
V
IN
T
A
= +25°C
T
A
= +25°C, R
L
= 3kΩ (Note 1)
1.1
0.9
-2
3.30
5
3.43
5.20
5.5
SYMBOL
CONDITIONS
MIN
TYP
0.7
5.5
1.1
MAX
UNITS
V
V
V
mV/°C
V
V
2
Maxim Integrated
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= 2V, FB = OUT (V
OUT
= 3.3V), R
L
= ˙∞,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Operating Current into OUT
(Note 3)
Shutdown Current into OUT
Efficiency
LX Switch On-Time
LX Switch Off-Time
FB Input Current
LBI Input Current
CLSEL Input Current
SHDN
Input Current
LBO
Low Output Voltage
LBO
Off Leakage Current
Damping Switch Resistance
SHDN
Input Voltage
CLSEL Input Voltage
V
IL
V
IH
V
IL
V
IH
0.8V
OUT
0.8V
OUT
0.2V
OUT
I
LBO
t
ON
t
OFF
I
FB
I
LBI
I
CLSEL
I
SHDN
SYMBOL
CONDITIONS
V
FB
= 1.4V, V
OUT
= 3.3V
SHDN
= GND
V
OUT
= 3.3V, I
LOAD
= 200mA
V
OUT
= 2V, I
LOAD
= 1mA
V
FB
= 1V, V
OUT
= 3.3V
V
FB
= 1V, V
OUT
= 3.3V
V
FB
= 1.4V
V
LBI
= 1.4V
MAX1676, CLSEL = OUT
V
SHDN
= 0 or V
OUT
V
LBI
= 0, I
SINK
= 1mA
V
LBO
= 5.5V, V
LBI
= 5.5V
MAX1676, V
BATT
= 2V
3
0.8
MIN
TYP
16
0.1
90
85
4
1
0.03
1
1.4
0.07
0.2
0.07
88
7
1.2
50
50
3
50
0.4
1
150
0.2V
OUT
MAX
35
1
UNITS
µA
µA
%
µs
µs
nA
nA
µA
nA
V
µA
Ω
V
V
ELECTRICAL CHARACTERISTICS
(V
BATT
= 2V, FB = OUT, R
L
=
∞,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 4)
PARAMETER
Output Voltage
Output Voltage Range
Reference Voltage
FB, LBI Thresholds
Internal NFET, PFET
On-Resistance
Operating Current into OUT
(Note 3)
Shutdown Current into OUT
LX Switch On-Time
LX Switch Off-Time
LX Switch Current
Limit (NFET)
t
ON
t
OFF
I
LIM
R
DS(ON)
V
FB
= 1.4V, V
OUT
= 3.3V
SHDN
= GND
V
FB
= 1V, V
OUT
= 3.3V
V
FB
= 1V, V
OUT
= 3.3V
MAX1674, MAX1676 (CLSEL = OUT)
MAX1675, MAX1676 (CLSEL = GND)
2.7
0.75
0.75
0.36
V
REF
I
REF
= 0
SYMBOL
V
OUT
FB = OUT
FB = GND
CONDITIONS
MIN
3.13
4.75
2.20
1.2675
1.2675
MAX
3.47
5.25
5.5
1.3325
1.3325
0.6
40
1
7.0
1.25
1.25
0.69
UNITS
V
V
V
V
Ω
µA
µA
µs
µs
A
Maxim Integrated
3
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
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 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.
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