LTC3230
TYPICAL PERFORMANCE CHARACTERISTICS
MLED/SLED Pin Current vs
MLED/SLED Current vs ENM/ENS
MLED/SLED Pin Voltage
Strobe Pulses
Ef?ciency vs V IN Voltage
30
25
V IN = 3.6V
25
20
V IN = 3.6V
R SET = 17.7k
90
80
70
20
60
15
15
50
10
10
40
30
5
5
20
C1 = C2 = C6 = 1 μ F
5 LEDs AT 25mA/LED
0
0
0.04 0.08 0.12 0.16
0.20
0
0
8
16
24
32
10
0
V F = 3.45V
T A = 25 ° C
2.7 3.1
3.5
3.9
4.3
4.7
0.35
0.30
0.25
0.20
MLED/SLED PIN VOLTAGE (V)
LDO2 Dropout Voltage vs
Load Current
3230 G16
0
–0.1
–0.2
–0.3
–0.4
NUMBER OF STROBE PULSES
Output Voltage Accuracy
vs Load Current
3230 G17
LDO2
50mV/DIV
AC COUPLED
LDO1
50mV/DIV
AC COUPLED
V IN (V)
3230 G18
LDO1 and LDO2 Load Transient
Response
60mA
0.15
0.10
–0.5
–0.6
I LDO
50mA/DIV
10mA
0.05
–0.7
C LDO = 1 μ F
40 μ s/DIV
3230 G21
0
0
25
50
75 100 125 150 175 200 225
–0.8
0
25
50
75
100 125 150 175 200
LOAD CURRENT (mA)
3230 G19
Output Voltage Accuracy
vs Temperature
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
–0.40
LOAD CURRENT (mA)
500
475
450
425
400
375
3230 G20
LDO1 and LDO2 Current Limit vs
Temperature
–0.45
–40
–20
0
20
40
60
80
350
–40 –20
0
20
40
60
80
100 120
TEMPERATURE ( ° C)
3230 G22
TEMPERATURE ( ° C)
3230 G23
3230fa
6
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