1x/1.5x/2x White LED Charge Pumps with
Two LDOs in 4mm x 4mm TQFN
Typical Operating Characteristics (continued)
(V IN = V EN_ = 3.6V, circuit of Figure 2, T A = +25°C, unless otherwise noted.)
900
BATTERY CURRENT vs. SUPPLY
VOLTAGE DRIVING FLASH
160
LDO GROUND-PIN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
1.8
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH SIX MAIN LEDs
800
150
V ENM_ = V ENF = 0V, V ENLDO = V IN
1.5
I LED = 15mA
700
600
500
400
I FLASH = 400mA
I FLASH = 160mA
140
130
120
NO LOAD, BOTH LDOs
150mA, BOTH LDOs
1.2
0.9
I LED = 4.5mA
300
200
100
0
I FLASH = 80mA
110
100
90
80
0.6
0.3
0
I LED = 1.5mA
2.7
3.0
3.3
3.6
3.9
4.2
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
10
SUPPLY VOLTAGE (V)
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH FLASH AND MAIN LEDs
16.0
SUPPLY VOLTAGE (V)
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH SIX MAIN LEDs
102.0
SUPPLY VOLTAGE (V)
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH TWO FLASH LEDs
9
8
7
6
5
4
3
2
1
0
FOUR MAIN LEDs AT 15mA EACH
I FLASH = 40mA
I FLASH = 160m A
I FLASH = 400mA
15.8
15.6
15.4
15.2
15.0
14.8
14.6
14.4
14.2
14.0
101.5
101.0
100.5
100.0
99.5
99.0
98.5
98.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
105
90
75
60
45
30
15
0
SUPPLY VOLTAGE (V)
LED CURRENT vs. AMBIENT
TEMPERATURE WITH SIX MAIN LEDs
450
400
350
300
250
200
150
100
50
0
SUPPLY VOLTAGE (V)
LED CURRENT vs. AMBIENT
TEMPERATURE WITH FLASH
100
10
1
SUPPLY VOLTAGE (V)
INDIVIDUAL MAIN LED CURRENT
vs. R SETM
-40
-15
10
35
60
85
-40
-15
10
35
60
85
1
10
100
T A ( ° C)
T A ( ° C)
R SETM (k Ω )
_______________________________________________________________________________________
5
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