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LTC3209-1/LTC3209-2
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V BAT1,2 = 3.6V, DV CC = 3V, R REF = 24.3k, C1 = C2 = C3 = C4 = 2.2 μ F,
unless otherwise noted.
PARAMETER
t SP
CONDITIONS
Spike Suppression Time
MIN
50
TYP
MAX
UNITS
ns
R REF
VR REF
RR REF
R REF = 24.3k
Reference Resistor Range
●
1.20
20
1.23
1.26
30
V
k ?
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 LTC3209-1/LTC3209-2 are guaranteed to meet performance
specifications from 0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C
ambient operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: 1.5x mode output impedance is defined as (1.5V BAT – V CPO )/I OUT .
2x mode output impedance is defined as (2V BAT – V CPO )/I OUT .
Note 4: Based on long term current density limitations. Assumes an
operating duty cycle of ≤ 10% under absolute maximum conditions for
duration less than 10 seconds. Max Charge Pump current for continuous
operation is 300mA.
Note 5: Based on long term current density limitations.
Note 6: All values are referrenced to V IH and V IL levels.
Note 7: Guaranteed by design.
TYPICAL PERFOR A CE CHARACTERISTICS T A = 25 ° C unless otherwise noted
V CPO
1V/DIV
Mode Switch Fast Dropout Times
2x
1.5x
1x
V BAT = 3.6V
REGC C2 = Hi
V CPO
20mV/DIV
AC COUPLED
1.5x Mode CPO Ripple
V BAT = 3.6V
I CPO = 200mA
C CPO = 2.2 μ F
V CPO
20mV/DIV
AC COUPLED
2x Mode CPO Ripple
V BAT = 3.6V
I CPO = 200mA
C CPO = 2.2 μ F
1ms/DIV
320912 G01
500ns/DIV
320912 G02
500ns/DIV
320912 G03
1.5x Mode Charge Pump Open-
1x Mode Switch Resistance
vs Temperature
Loop Output Resistance vs
Temperature (1.5V BAT –V CPO )/I CPO
1.5x Mode CPO Voltage
vs Load Current
0.65
0.60
0.55
I CPO = 200mA
V BAT = 3.6V
3.2
3.0
2.8
V BAT = 3V
V CPO = 4.2V
C2 = C3 = C4 = 2.2 μ F
4.8
4.6
4.4
C2 = C3 = C4 = 2.2 μ F
3.6V
0.50
V BAT = 3.3V
2.6
4.2
0.45
V BAT = 3.9V
2.4
4.0
V BAT = 3V
3.1V
3.2V
3.3V
0.40
0.35
2.2
2.0
3.8
3.6
3.4V
3.5V
–40
–15
10 35
60
85
–40
–15
10 35
60
85
0
100
200 300 400
500
TEMPERATURE ( ° C)
3209 G05
TEMPERATURE ( ° C)
3209 G06
LOAD CURRENT (mA)
3209 G07
320912fa
4
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