LTC3209-1 Datasheet, PDF (4/20 Pages) Linear Technology – 600mA Main/Camera LED Controller

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 = 2.2µF,
unless otherwise noted.
PARAMETER
t_SP
R_REF
VR_REF
RR_REF
CONDITIONS
Spike Suppression Time
R_REF = 24.3k
Reference Resistor Range
MIN TYP MAX UNITS
50
ns
● 1.20 1.23 1.26
V
20
30
kΩ
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
Mode Switch Fast Dropout Times
1.5x Mode CPO Ripple
2x Mode CPO Ripple
V_CPO
1V/DIV
1.5x
1x
V_BAT = 3.6V
REGC C2 = Hi
1ms/DIV
2x
V_CPO
20mV/DIV
AC COUPLED
320912 G01
V_BAT = 3.6V
I_CPO = 200mA
C_CPO = 2.2µF
500ns/DIV
V_CPO
20mV/DIV
AC COUPLED
320912 G02
V_BAT = 3.6V
I_CPO = 200mA
C_CPO = 2.2µF
500ns/DIV
320912 G03
1x Mode Switch Resistance
vs Temperature
0.65
I_CPO = 200mA
0.60
0.55
V_BAT = 3.6V
V_BAT = 3.3V
0.50
V_BAT = 3.9V
0.45
0.40
0.35
–40
–15
10
35
60
85
TEMPERATURE (°C)
3209 G05
4
1.5x Mode Charge Pump Open-
Loop Output Resistance vs
Temperature (1.5V_BAT–V_CPO)/I_CPO
3.2
V_BAT = 3V
V_CPO = 4.2V
3.0 C2 = C3 = C4 = 2.2µF
2.8
2.6
2.4
2.2
2.0
–40
–15 10
35
60
85
TEMPERATURE (°C)
3209 G06
1.5x Mode CPO Voltage
vs Load Current
4.8
C2 = C3 = C4 = 2.2µF
4.6
4.4
3.6V
4.2
V_BAT = 3V
3.1V
4.0
3.2V
3.3V
3.8
3.4V
3.5V
3.6
0
100 200 300 400 500
LOAD CURRENT (mA)
3209 G07
320912fa