PRODUCT DATASHEET
AAT1272
TM
SwitchReg
1.5A Step-Up Current Regulator for Flash LEDs
Typical Characteristics
Flash Mode Efficiency vs. Input Voltage
Movie Mode Efficiency vs. Input Voltage
90
100
320mA, VF = 2.91V
102mA/ch
85
540mA, VF = 3.00V
52mA/ch
90
700mA, VF = 3.04V
900mA, VF = 3.04V
1500mA, VF = 3.15V
1200mA, VF = 3.27V
26mA/ch
80
75
70
65
60
55
50
80
70
60
50
40
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
Input Voltage (V)
Input Voltage (V)
Boost Switching Frequency vs. Input Voltage
Shutdown Current vs. Input Voltage
(Movie Mode; L = 1µH)
(VEN/SET = VFLEN = 0V)
3
2.5
2
0.03
0.025
0.02
0.015
0.01
0.005
0
1.5
1
85°C
25°C
0.5
25°C
-40°C
-40°C
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
Input Voltage (V)
Input Voltage (V)
Supply Current vs. Input Voltage
Movie Mode Current vs. Temperature
(VEN = VFLEN = 3.6V)
(IFLOUTX = 103mA/Ch; VIN = 3.6V; L = 1µH)
120
115
110
105
100
95
1000
900
800
700
600
500
400
300
200
100
0
90
85°C
FLOUTA
FLOUTB
25°C
85
-40°C
80
-40
-15
10
35
60
85
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Temperature (°C)
w w w . a n a l o g i c t e c h . c o m
6
1272.2009.04.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
