LTC3207-1_15 Datasheet, PDF (4/20 Pages) Linear Technology – 600mA Universal Multi-Output LED/CAM Driver

LTC3207/LTC3207-1
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BAT = 3.6V, DV_CC = 3V, ENU = Hi, CAMHL = LO, C1 = C2 = C3 = 2.2µF,
C4 = 4.7µF, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
t_f
Clock Data Fall Time
20
300
ns
t_r
Clock Data Rise Time
20
300
ns
t_SP
Spike Suppression Time
50
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
specifications from 0°C to 85°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: 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 specified maximum operating junction
temperature may result in device degradation or failure.
Note 5: 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 6: All values are referenced to V_IH and V_IL levels.
Note 7: Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS _{TA = 25°C unless otherwise noted}
Mode Switch Dropout Times
V_BAT = 3.6V
V_CPO
1V/DIV
1x
1.5x
2x
1.5x Mode CPO Ripple
V_CPO
20mV/DIV
AC
COUPLED
2x Mode CPO Ripple
V_CPO
20mV/DIV
AC
COUPLED
200µs/DIV
3207 G01
1x Mode Switch Resistance
vs Temperature
0.80
I_CPO = 200mA
0.75
V_BAT = 3.3V
0.70
0.65
V_BAT = 3.6V
0.60
0.55
V_BAT = 3.9V
0.50
0.45
0.40
–40
–15 10
35
60
85
TEMPERATURE (°C)
3207 G04
4
V_BAT = 3.6V
I_CPO = 200mA
C_CPO = 4.7µF
500ns/DIV
3207 G02
1.5x Mode Charge Pump Open-Loop
Output Resistance vs Temperature
(1.5V_BAT -V_CPO) / I_CPO
4.5
V_BAT = 3V
4.3 V_CPO = 4.2V
4.1
C2 = C3 = 2.2µF
C4 = 4.7µF
3.9
3.7
3.5
3.3
3.1
2.9
2.7
2.5
–40 –15 10
35
60
85
TEMPERATURE (°C)
3207 G05
V_BAT = 3.6V
I_VCPO = 200mA
C_CPO = 4.7µF
500ns/DIV
3207 G03
1.5x Mode CPO Voltage vs I_CPO
4.8
C2 = C3 = 2.2µF
C4 = 4.7µF
4.6
4.4
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
V_BAT = 3V
4.2
4.0
3.8
3.6
0
100 200 300 400 500
I_CPO (mA)
3207 G06
3207fc