PRODUCT DATASHEET
AAT1271
SwitchReg
TM
Typical Characteristics
Flash Turn On Characteristic
(I
FLOUTX
= 750mA/ch; V
IN
= 3.6V; L = 1µH)
1.5A Step-Up Current Regulator for Flash LEDs
Movie Mode to Flash Turn On Characteristic
(I
FLOUTX
= 103mA to 750mA/ch; V
IN
= 3.6V; L = 1µH)
V
FLEN
(5V/div)
V
OUT
(2V/div)
V
SINK
(2V/div)
I
FLOUTX
(1A/div)
0V
0V
V
FLEN
(2V/div)
V
OUT
(2V/div)
V
SINK
(500mV/div)
I
FLOUTX
(1A/div)
0V
2V
0V
0V
0V
0A
Time (50µs/div)
Time (50µs/div)
Movie Mode Turn On Characteristic
(I
FLOUTX
= 103mA/ch; V
IN
= 3.6V; L = 1µH)
Movie Mode Transition Characteristic
(I
FLOUTX
= 103mA to 188mA/ch; C
OUT
= 0.22µF;
V
IN
= 3.6V; L = 1µH)
V
EN/SET
(2V/div)
V
OUT
(2V/div)
V
SINK
(500mV/div)
V
EN/SET
(5V/div)
V
OUT
(2V/div)
V
SINK
(500mV/div)
I
FLOUTX
(100mA/div)
0V
0V
0V
0V
0V
I
FLOUTX
(100mA/div)
0V
0A
0A
Time (100µs/div)
Time (100µs/div)
Flash Timeout vs. Temperature
(I
FLOUTX
= 750mA/ch; V
IN
= 3.6V; C
T
= 47nF)
500
1.4
1.3
EN, FLEN High Threshold Voltage
vs. Input Voltage
V
EN/SET(H)
, V
FLEN(H)
(V)
Flash Timeout (ms)
450
400
350
300
250
200
-40
-15
10
35
60
85
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
85°C
25°C
-40°C
Temperature (°C)
Input Voltage (V)
1271.2008.08.1.1
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