Datasheet

LTC3230
6
3230fa
TYPICAL PERFORMANCE CHARACTERISTICS
MLED/SLED Pin Current vs
MLED/SLED Pin Voltage
MLED/SLED Current vs ENM/ENS
Strobe Pulses
Effi ciency vs V
IN
Voltage
LDO2 Dropout Voltage vs
Load Current
Output Voltage Accuracy
vs Load Current
LDO1 and LDO2 Load Transient
Response
Output Voltage Accuracy
vs Temperature
LDO1 and LDO2 Current Limit vs
Temperature
MLED/SLED PIN VOLTAGE (V)
0
MLED/SLED PIN CURRENT (mA)
10
20
30
5
15
25
0.04 0.08 0.12 0.16
3230 G16
0.200
V
IN
= 3.6V
NUMBER OF STROBE PULSES
0
MLED/SLED CURRENT (mA)
10
15
32
3230 G17
5
0
8
16
24
25
20
V
IN
= 3.6V
R
SET
= 17.7k
V
IN
(V)
2.7
0
EFFICIENCY (P
LED
/P
IN
) (%)
10
30
40
50
4.3
90
3230 G18
20
3.5
3.1
4.7
3.9
60
70
80
C1 = C2 = C6 = 1μF
5 LEDs AT 25mA/LED
V
F
= 3.45V
T
A
= 25°C
LOAD CURRENT (mA)
0
0
DROPOUT VOLTAGE (V)
0.05
0.10
0.15
150 175 200100
0.35
3230 G19
50
25
125
75 225
0.20
0.25
0.30
LOAD CURRENT (mA)
0
% CHANGE FROM NO LOAD (%)
–0.4
–0.2
200
3230 G20
–0.6
–0.8
50
100
150
25
75
125
175
0
–0.5
–0.3
–0.7
–0.1
LDO2
50mV/DIV
AC COUPLED
LDO1
50mV/DIV
AC COUPLED
40μs/DIVC
LDO
= 1μF
3230 G21
I
LDO
50mA/DIV
60mA
10mA
TEMPERATURE (°C)
–40
–0.45
% CHANGE FROM 25°C (%)
–0.40
–0.30
–0.25
–0.20
0.05
–0.10
04060
3230 G22
–0.35
–0.05
0
–0.15
–20 20 80
TEMPERATURE (°C)
–40
350
LDO CURRENT LIMIT (mA)
375
425
450
475
0
40
60
3230 G23
400
–20 20
80
100
120
500