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LTC3230 Datasheet, PDF (3/16 Pages) Linear Technology – 5-LED Main/Sub Display Driver with Dual LDO | |||
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LTC3230
ELECTRICAL CHARACTERISTICS The â denotes the speciï¬cations which apply over the full operating
temperature range, otherwise speciï¬cations are at TA = 25°C. VIN = 3.6V, C1 = C2 = C4 = C5 = C6 = 1μF, RSET = 17.4k, ENM = ENS =
high, ENLDO1 = ENLDO2 = low, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CPO Short Circuit Detection
Threshold Voltage
â
0.4
1.3
V
Charge Pump (CPO)
1x Mode Output Voltage
1.5x Mode Output Voltage
2x Mode Output Voltage
1x Mode Output Impedance
ICPO = 0mA
ICPO = 0mA
ICPO = 0mA
VIN
V
4.5
V
5.0
V
1.6
Ω
1.5x Mode Output Impedance
2x Mode Output Impedance
Clock Frequency
VIN = 3.4V, VCPO = 4.6V (Note 6)
VIN = 3.4V, VCPO = 5.1V (Note 6)
7.9
Ω
9.2
Ω
0.9
MHz
Mode Switching Delay
0.5
ms
tEN
Current Source Enable Time (ENM, ENS = High)
â
250
μs
(Note 7)
LDO1, LDO2
Bias per 1 LDO
ENM = ENS = Low
125
μA
Additional DC Bias per LDO
60
μA
Output Voltage Accuracy
Current Limit
IOUT = 100μA
â
â3
3
%
â 280
475
750
mA
Line Regulation
Load Regulation
Dropout Voltage
V1, V2
VLDO = 1.8V, IOUT = 50mA
VIN = 3.6V, 100μA < ILDO < 200mA
LDO2, VLDO = 3.3V, VIN â VLDO at VLDO 3% Down
from VLDO Measureed at VIN = 4.3V
0.1
%/V
0.65
%
250
mV
VIL
VIH
Shutdown Input Current
ENLDO1 = ENLDO2 = Low
â
â VIN â 0.2
â1
0.2
V
V
1
μA
Active Input Current
ENLDO1 = ENLDO2 = High
â3
3
μA
ENM, ENS, ENLDO1, ENLDO2
VIL
VIH
IIH
IIL
ENM, ENS Timing
VIH = 3.6V
VIL = 0V
â
0.4
V
â
1.4
V
3
μA
â
â1
1
μA
tPWH
tPWL
tSD
RSET
VRSET
IRSET
High Pulse Width
Low Pulse Width
Low Time to Shutdown (ENM, ENS = Low)
â
0.2
0.2
â 250
μs
20
μs
μs
â 768
800
832
mV
â
70
μA
3230fa
3
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