LTC3210 Datasheet, PDF (3/16 Pages) Linear Technology – MAIN/CAM LED Controller in 3mm × 3mm QFN

LTC3210
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, C1 = C2 = C3 = C4 = 2.2µF, RM = 30.1k, RC = 24.3k,
ENM = high, unless otherwise noted.
PARAMETER
CLED Current
LED Current Ratio (I_CLED/I_RC)
LED Dropout Voltage
CLED Current, 3-Bit Linear DAC
Charge Pump (CPO)
1x Mode Output Voltage
1.5x Mode Output Voltage
2x Mode Output Voltage
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
CLOCK Frequency
Mode Switching Delay
ENC, ENM
V_IL
V_IH
I_IH
I_IL
ENC, ENM Timing
t_PW
t_SD
t_EN
RM, RC
V_RM, V_RC
I_RM, I_RC
CONDITIONS
MIN TYP MAX UNITS
I_CLED = Full Scale
● 6750 7500 8250
A/A
Mode Switch Threshold, I_CLED = Full Scale
500
mV
1 ENC Strobe (FS)
7 ENC Strobes (FS/7)
380
mA
54
mA
I_CPO = 0mA
I_CPO = 0mA
I_CPO = 0mA
V_BAT = 3.4V, V_CPO = 4.6V (Note 4)
V_BAT = 3.2V, V_CPO = 5.1V (Note 4)
V_BAT
V
4.55
V
5.05
V
0.5
Ω
3.15
Ω
3.95
Ω
0.8
MHz
0.4
ms
ENM = ENC = 3.6V
ENM = ENC = 0V
●
0.4
V
● 1.4
V
● 10
15
20
µA
● –1
1
µA
Minimum Pulse Width
● 60
ns
Low Time to Shutdown (ENC and ENM = Low) ● 50
150
250
µs
Current Source Enable Time
(ENC or ENM = High) (Note 5)
● 50
150
250
µs
● 1.16 1.20 1.24
V
●
70
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may become 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. Maximum current for continuous
operation is 300mA.
Note 3: The LTC3210E 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.
Note 4: 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 5: If the part has been shut down then the initial enable time is about
100µs longer due to the bandgap enable time.
3210f
3