LTC3230_15 Datasheet, PDF (3/16 Pages) Linear Technology – 5-LED Main/Sub Display Driver with Dual LDO

LTC3230
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, C1 = C2 = C4 = C5 = C6 = 1μF, R_SET = 17.4k, ENM = ENS =
high, ENLDO1 = ENLDO2 = low, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CPO Short Circuit Detection
Threshold Voltage
●
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
I_CPO = 0mA
I_CPO = 0mA
I_CPO = 0mA
V_IN
V
4.5
V
5.0
V
1.6
Ω
1.5x Mode Output Impedance
2x Mode Output Impedance
Clock Frequency
V_IN = 3.4V, V_CPO = 4.6V (Note 6)
V_IN = 3.4V, V_CPO = 5.1V (Note 6)
7.9
Ω
9.2
Ω
0.9
MHz
Mode Switching Delay
0.5
ms
t_EN
Current Source Enable Time (ENM, ENS = High)
●
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
I_OUT = 100μA
●
–3
3
%
● 280
475
750
mA
Line Regulation
Load Regulation
Dropout Voltage
V1, V2
V_LDO = 1.8V, I_OUT = 50mA
V_IN = 3.6V, 100μA < I_LDO < 200mA
LDO2, V_LDO = 3.3V, V_IN – V_LDO at V_LDO 3% Down
from V_LDO Measureed at V_IN = 4.3V
0.1
%/V
0.65
%
250
mV
V_IL
V_IH
Shutdown Input Current
ENLDO1 = ENLDO2 = Low
●
● V_IN – 0.2
–1
0.2
V
V
1
μA
Active Input Current
ENLDO1 = ENLDO2 = High
–3
3
μA
ENM, ENS, ENLDO1, ENLDO2
V_IL
V_IH
I_IH
I_IL
ENM, ENS Timing
V_IH = 3.6V
V_IL = 0V
●
0.4
V
●
1.4
V
3
μA
●
–1
1
μA
t_PWH
t_PWL
t_SD
R_SET
V_RSET
I_RSET
High Pulse Width
Low Pulse Width
Low Time to Shutdown (ENM, ENS = Low)
●
0.2
0.2
● 250
μs
20
μs
μs
● 768
800
832
mV
●
70
μA
3230fa
3