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LTC3207/LTC3207-1
ELECTRICAL CHARACTERISTICS
The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V BAT = 3.6V, DV CC = 3V, ENU = Hi, CAMHL = LO, C1 = C2 = C3 = 2.2 μ F,
C4 = 4.7 μ F, unless otherwise noted.
PARAMETER
t f
t r
t SP
CONDITIONS
Clock Data Fall Time
Clock Data Rise Time
Spike Suppression Time
MIN
20
20
50
TYP
MAX
300
300
UNITS
ns
ns
ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3207E/LTC3207E-1 are guaranteed to meet performance
speci?cations from 0°C to 85°C. Speci?cations over the –40°C to
85°C ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: Based on long term current density limitations. Assumes operating
duty cycle of <10% under absolute maximum conditions for durations less
than 10 seconds.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the speci?ed maximum operating junction
temperature may result in device degradation or failure.
Note 5: 1.5x mode output impedance is de?ned as (1.5V BAT – V CPO )/I OUT .
2x mode output impedance is de?ned as (2V BAT – V CPO )/I OUT .
Note 6 : All values are referenced to V IH and V IL levels.
Note 7: Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise noted
Mode Switch Dropout Times
V BAT = 3.6V
1.5x Mode CPO Ripple
2x Mode CPO Ripple
V CPO
1V/DIV
1x
1.5x
2x
V CPO
20mV/DIV
V CPO
20mV/DIV
AC
COUPLED
AC
COUPLED
200μs/DIV
3207 G01
500ns/DIV
3207 G02
500ns/DIV
3207 G03
V BAT = 3.6V
I CPO = 200mA
C CPO = 4.7μF
1.5x Mode Charge Pump Open-Loop
V BAT = 3.6V
I VCPO = 200mA
C CPO = 4.7μF
1x Mode Switch Resistance
Output Resistance vs Temperature
vs Temperature
(1.5V BAT -V CPO ) / I CPO
1.5x Mode CPO Voltage vs I CPO
0.80
0.75
0.70
0.65
I CPO = 200mA
V BAT = 3.6V
V BAT = 3.3V
4.5
4.3
4.1
3.9
3.7
V BAT = 3V
V CPO = 4.2V
C2 = C3 = 2.2μF
C4 = 4.7μF
4.8
4.6
4.4
C2 = C3 = 2.2μF
C4 = 4.7μF
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
V BAT = 3V
0.60
3.5
4.2
0.55
0.50
0.45
V BAT = 3.9V
3.3
3.1
2.9
2.7
4.0
3.8
0.40
–40
–15
10
35
60
85
2.5
–40
–15
10
35
60
85
3.6
0
100
200
300
400
500
TEMPERATURE (°C)
3207 G04
TEMPERATURE (°C)
3207 G05
I CPO (mA)
3207 G06
3207fc
4
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