LTC3214 Datasheet, PDF (3/12 Pages) Linear Technology – 500mA Camera LED Charge Pump

LTC3214
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, C_IN = C1 = C2 = 2.2µF, C_CPO = 4.7µF.
PARAMETER
I_SET
V_ISET
I_ISET
CONDITIONS
I_SET = 50µA
MIN TYP MAX UNITS
● 1.18 1.21 1.24
V
●
184
µA
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: 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
300mA.
Note 3: The LTC3214E 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 (T_A = 25°C unless otherwise specified)
I_LED Dropout Voltage
vs LED Current
0.12
0.10
0.08
0.06
0.04
0.02
0
0
100 200 300 400 500
LED CURRENT (mA)
3216 G01
1x Mode Charge Pump Open-Loop
Output Resistance vs Temperature
1.0 _{ICPO = 100mA}
0.9
V_IN = 2.9V
0.8
V_IN = 3.6V
0.7
V_IN = 4.5V
0.6
0.5
0.4
–40
–15 10
35
60
85
TEMPERATURE (°C)
3216 G03
I_LED vs R_SET
600
500
400
300
200
100
0
0 50 100 150 200 250 300 350 400
R_SET (kΩ)
1573 G02
2x Mode Charge Pump
Open-Loop Output Resistance
(2V_IN – V_CPO)/I_CPO vs Temperature
5
4
3
2
1 _{VIN = 3.6V}
C_IN = C1 = C2 = 2.2µF
C_CPO = 4.7µF
0
–40 –15 10
35
TEMPERATURE (°C)
60
85
3216 G05
3214fa
3