LTC3210-2 Datasheet, PDF (3/16 Pages) Linear Technology – MAIN/CAM LED Controllers with 32-Step Brightness Control in 3mm × 3mm QFN

LTC3210-2/LTC3210-3
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
MLED Current, 5-Bit Linear DAC
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
CPO Short Circuit Detection
Threshold Voltage
Test Current
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
1 ENM Strobe (FS)
31 ENM Strobes (FS/31)
I_CLED = Full Scale
Mode Switch Threshold, I_CLED = Full Scale
1 ENC Strobe (FS)
7 ENC Strobes (FS/7)
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)
CPO = 0V, ENM = ENC = Low
ENM = ENC = 3.6V
ENM = ENC = 0V
Minimum Pulse Width
Low Time to Shutdown (ENC, ENM = Low)
Current Source Enable Time
(ENC, ENM = High) (Note 5)
MIN TYP MAX UNITS
20
mA
0.640
mA
● 6930 7700 8470
A/A
500
mV
380
mA
54
mA
V_BAT
V
4.55
V
5.05
V
0.55
Ω
3.15
Ω
3.95
Ω
0.8
MHz
0.4
ms
● 0.4
● 10
1.3
V
30
mA
●
0.4
V
● 1.4
V
● 10
15
20
μA
● –1
1
μA
● 200
ns
● 50
150
250
μs
● 50
150
250
μs
● 1.16 1.20 1.24
V
●
80
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. Maximum current for continuous
operation is 300mA.
Note 3: The LTC3210-2/LTC3210-3 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 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.
321023fa
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