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LTC3453
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C, V IN = V OUT = 3.6V unless otherwise noted. (Note 2)
PARAMETER
PMOS Switch Leakage
NMOS Switch Leakage
Oscillator Frequency
CONDITIONS
Switches A and D
Switches B and C
●
●
MIN
0.9
TYP
1
MAX
1
1
1.1
UNITS
μ A
μ A
MHz
Soft-Start Time
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 LTC3453E is guaranteed to meet specifications from 0 ° C to
70 ° C. Specifications over the –40 ° C to 85 ° C operating temperature range
0.65
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
T J = T A + (P D ? θ JA ° C/W).
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
ms
are assured by design, characterization and correlation with statistical
process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
Input DC Supply Current in
Shutdown vs Temperature
Undervoltage Lockout Threshold
vs Temperature
I SET1,2 Servo Voltage vs
Temperature
20
FRONT PAGE APPLICATION
2.2
812
V IN = 3.6V
18
R ISET1,2 = 8.25k
16
14
12
V IN = 5.5V
V IN = 4.2V
2.1
2.0
V IN RISING
808
804
10
8
6
4
2
V IN = 3.6V
V IN = 2.7V
1.9
1.8
V IN FALLING
800
796
792
0
–55 –35 –15
5
25
45 65 85 105 125
1.7
–55 –35 –15
5
25
45 65 85 105 125
788
–55 –35 –15
5
25
45 65 85 105 125
TEMPERATURE ( ° C)
I SET1,2 Servo Voltage vs V IN
3453 G01
TEMPERATURE ( ° C)
Regulated Maximum V OUT vs
Temperature
3453 G02
TEMPERATURE ( ° C)
Oscillator Frequency vs
Temperature
3453 G04
812
808
T A = 25 ° C
R ISET1,2 = 8.25k
4.55
V IN = 3.6V
4.54 ALL LED PINS OPEN
4.53
1050
1040
1030
V OUT = 3V
V IN = 5.5V
V IN = 4.2V
804
4.52
1020
800
796
792
788
4.51
4.50
4.49
4.48
4.47
4.46
4.45
1010
1000
990
980
970
960
950
V IN = 3.6V
V IN = 2.7V
2.7
3.1
3.5
3.9 4.3
4.7
5.1
5.5
–55 –35 –15
5
25
45 65 85 105 125
–55 –35 –15
5
25
45 65 85 105 125
V IN (V)
3453 G05
TEMPERATURE ( ° C)
3453 G06
TEMPERATURE ( ° C)
3453 G07
3453fa
3
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