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LTC3215 bảng dữ liệu(PDF) 3 Page - Linear Technology

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LTC3215
3
3215f
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Based on long-term current density limitations. Assumes an
operating duty cycle of ≤ 10% under absolute maximum conditions for
durations less than 10 seconds. Max current for continuous operation is
350mA.
Note 3: The LTC3215E is 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.
TYPICAL PERFOR A CE CHARACTERISTICS
ILED Dropout Voltage
vs LED Current
ILED Pin Current
vs ILED Pin Voltage
ILED vs RSET
LED CURRENT (mA)
0
200
400
800
600
3216 G01
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
ILED PIN VOLTAGE (V)
0
600
500
400
300
200
100
0
0.2
0.4
0.6
0.8
3216 G02
1.0
TEMPERATURE (°C)
–40
10
60
85
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3216 G05
–15
35
–40
10
60
85
–15
35
TEMPERATURE (°C)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3216 G06
ILED = 500mA
400mA
300mA
200mA
100mA
VIN = 3V
VCPO = 4.2V
CIN = C1 = C2 = 2.2µF
CCPO = 4.7µF
VIN = 3V
VCPO = 4.8V
CIN = C1 = C2 = 2.2µF
CCPO = 4.7µF
TEMPERATURE (°C)
–40
35
85
3216 G07
–15
10
60
0.31
0.29
0.27
0.25
0.23
0.21
0.19
0.17
0.15
ICPO = 200mA
VIN = 3.6V
VIN = 3.3V
VIN = 3.9V
VIN = 3.6V
RSET (kΩ)
1573 G06
1000
800
600
400
200
0
0
10
20
25
515
30
35
40
1.5x Mode Charge Pump
Open-Loop Output Resistance
(1.5VIN – VCPO)/ICPO vs Temperature
2x Mode Charge Pump
Open-Loop Output Resistance
(2VIN – VCPO)/ICPO vs Temperature
1x Mode Charge Pump Open-Loop
Output Resistance vs Temperature
(TA = 25°C unless otherwise specified)
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, CIN = C1 = C2 = 2.2µF, CCPO = 4.7µF.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ISET
VISET
ISET = 50µA
1.195
1.22
1.245
V
IISET
225
µA


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