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MAX1674 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part No. MAX1674
Description  High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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 3 page
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High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(VBATT = 2V, FB = OUT, RL =
∞, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
VOUT = 2V, ILOAD = 1mA
VOUT = 3.3V, ILOAD = 200mA
SHDN = GND
CONDITIONS
%
85
Efficiency
90
µA
0.1
1
Shutdown Current into OUT
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX1676, VBATT = 2V
V LBO = 5.5V, VLBI = 5.5V
VLBI = 0, ISINK = 1mA
V SHDN = 0 or VOUT
VFB = 1V, VOUT = 3.3V
MAX1676, CLSEL = OUT
VLBI = 1.4V
VFB = 1.4V
VFB = 1V, VOUT = 3.3V
0.8VOUT
VIH
0.2VOUT
VIL
CLSEL Input Voltage
V
0.8VOUT
VIH
0.2VOUT
VIL
SHDN Input Voltage
88
150
Damping Switch Resistance
µA
0.07
1
I LBO
LBO Off Leakage Current
V
0.2
0.4
LBO Low Output Voltage
nA
0.07
50
ISHDN
SHDN Input Current
µA
1.4
3
ICLSEL
CLSEL Input Current
nA
150
ILBI
LBI Input Current
nA
0.03
50
IFB
FB Input Current
µs
0.8
1
1.2
tOFF
LX Switch Off-Time
µs
34
7
tON
LX Switch On-Time
V
ELECTRICAL CHARACTERISTICS (continued)
(VBATT = 2V, FB = OUT (VOUT = 3.3V), RL = ˙
∞, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
FB = GND
FB = OUT
VFB = 1V, VOUT = 3.3V
VFB = 1V, VOUT = 3.3V
SHDN = GND
VFB = 1.4V, VOUT = 3.3V
IREF = 0
MAX1675, MAX1676 (CLSEL = GND)
MAX1674, MAX1676 (CLSEL = OUT)
CONDITIONS
0.36
0.69
A
0.75
1.25
ILIM
LX Switch Current
Limit (NFET)
V
2.20
5.5
Output Voltage Range
V
4.75
5.25
3.13
3.47
VOUT
Output Voltage
µs
0.75
1.25
tOFF
LX Switch Off-Time
µs
2.7
7.0
tON
LX Switch On-Time
µA
1
Shutdown Current into OUT
µA
40
Operating Current into OUT
(Note 3)
V
1.2675
1.3325
VREF
Reference Voltage
V
1.2675
1.3325
FB, LBI Thresholds
0.6
RDS(ON)
Internal NFET, PFET
On-Resistance
UNITS
MIN
MAX
SYMBOL
PARAMETER
VFB = 1.4V, VOUT = 3.3V
µA
16
35
Operating Current into OUT
(Note 3)




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