LTC3220_15 Datasheet, PDF (3/20 Pages) Linear Technology – 360mA Universal 18-Channel LED Driver

LTC3220/LTC3220-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, DV_CC = 3V, RST = high, C1 = C2 = C3 = 2.2μF, C4 = 4.7μF,
unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
V_IN Shutdown Current
DV_CC Shutdown Current
Universal LED Current, 6-Bit Linear DACs, ULED = 1V
Full-Scale LED Current
Minimum (I_LSB) LED Current Step
Minimum Programmable Current
ULED Data Register Programmed to
0b00000001
LED Current Matching
Any Two Outputs, 50% of FS
LED Dropout Voltage
Blink Rate Period
I_LED = FS
REG19, D4 = 0
REG19, D4 = 1
ULED Up/Down Gradation Ramp Times
REG19, D1 = 1, D2 = 0
REG19, D1 = 0, D2 = 1
REG19, D1 = 1, D2 = 1
Gradation Period
REG19, D1 = 1, D2 = 0
REG19, D1 = 0, D2 = 1
REG19, D1 = 1, D2 = 1
V_OL General Purpose Output Mode (GPO) I_OUT = 1mA, Single Output Enabled
LED Turn-On Delay
From Stop Bit, Part Enabled
Charge Pump (CPO)
1x Mode Output Impedance
1.5x Mode Output Impedance
2x Mode Output Impedance
CPO Regulation Voltage
Clock Frequency
V_IN = 3V, V_CPO = 4.2V (Note 5)
V_IN = 3V, V_CPO = 4.8V (Note 5)
1.5x Mode, I_CPO = 20mA
2x Mode, I_CPO = 20mA
CPO Short-Circuit Detection
Threshold Voltage
Test Current
SDA, SCL, RST
CPO = 0V
V_IL
V_IH
I_IH
I_IL
V_OL
RST Timing
Digital Output Low (SDA)
Reset Pulse Duration
SDA, SCL, RST = DV_CC
SDA, SCL, RST = 0V
I_PULLUP = 3mA
Serial Port Timing (Notes 6, 7)
f_SCL
Clock Operating Frequency
t_BUF
Bus Free Time Between Stop and Start
Condition
t_HD,STA
t_SU,STA
t_SU,STO
Hold Time After (Repeated) Start Condition
Repeated Start Condition Setup Time
Stop Condition Setup Time
MIN
TYP
MAX UNITS
l
3.2
7
μA
l
1
μA
l 18
20
22
mA
0.314
mA
0.395
mA
1.5
%
120
mV
1.25
Sec
2.5
Sec
0.24
Sec
0.48
Sec
0.96
Sec
0.313 0.410 Sec
0.625 0.820 Sec
1.25 1.640 Sec
5
mV
4
μs
0.6
Ω
3.6
Ω
4.1
Ω
4.5
V
5.03
V
l 0.65
0.85
1.05 MHz
l 0.4
l 10
1.3
V
30
mA
l
l 0.7 • DV_CC
l –1
0.3 • DV_CC
V
V
1
μA
l –1
1
μA
l
0.12
0.4
V
20
ns
400
kHz
1.3
μs
0.6
μs
0.6
μs
0.6
μs
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