AAT1270_08 Datasheet, PDF (5/18 Pages) Advanced Analogic Technologies – 1A Step-Up Current Regulator for Flash LEDs

SwitchReg^TM
Typical Characteristics
Efficiency vs. Input Voltage
(Movie and Flash Mode)
90
85
68.5mA
500mA
80
(Movie)
(Flash)
75
70
65
60
34.25mA
(Movie)
55
13.7mA
50
(Movie)
45
40
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
PRODUCT DATASHEET
AAT1270
1A Step-Up Current Regulator for Flash LEDs
Shutdown Current vs. Input Voltage
(EN/SET = FLEN = 0V)
0.12
0.1
0.08
0.06
0.04
0.02
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Switching Frequency vs. Input Voltage
(EN/SET = FLEN = 0V)
3.0
2.5
-40°C
2.0
1.5
1.0
85°C
25°C
0.5
0.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Movie Mode LED Current Accuracy vs. Input Voltage
(68.5mA/Ch)
10
5
FLOUTB
0
-5
FLOUTA
-10
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Movie Mode Current Matching vs. Temperature
(68.5mA/ch)
70.5
70.0
FLOUTA
69.5
69.0
68.5
68.0
67.5 ^FLOUTB
67.0
66.5
66.0
65.5
-40
-15
10
35
60
85
Temperature (°C)
Flash Mode Current Matching vs. Temperature
(500mA/ch)
515
510
505
500
FLOUTA
495
FLOUTB
490
485
-40
-15
10
35
60
85
Temperature (°C)
1270.2008.07.1.5
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