LTC3220I(RevC) 查看數據表（PDF） - Linear Technology
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LTC3220I Datasheet PDF : 20 Pages
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LTC3220/LTC3220-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, DVCC = 3V, RST = high, C1 = C2 = C3 = 2.2μF, C4 = 4.7μF,
unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VIN Shutdown Current
DVCC Shutdown Current
Universal LED Current, 6-Bit Linear DACs, ULED = 1V
Full-Scale LED Current
Minimum (ILSB) 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
ILED = 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
VOL General Purpose Output Mode (GPO) IOUT = 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
VIN = 3V, VCPO = 4.2V (Note 5)
VIN = 3V, VCPO = 4.8V (Note 5)
1.5x Mode, ICPO = 20mA
2x Mode, ICPO = 20mA
CPO Short-Circuit Detection
Threshold Voltage
Test Current
SDA, SCL, RST
CPO = 0V
VIL
VIH
IIH
IIL
VOL
RST Timing
Digital Output Low (SDA)
Reset Pulse Duration
SDA, SCL, RST = DVCC
SDA, SCL, RST = 0V
IPULLUP = 3mA
Serial Port Timing (Notes 6, 7)
fSCL
Clock Operating Frequency
tBUF
Bus Free Time Between Stop and Start
Condition
tHD,STA
tSU,STA
tSU,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 • DVCC
l –1
0.3 • DVCC
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
32201fc
3
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