PRODUCT DATASHEET
AAT1272
TM
SwitchReg
1.5A Step-Up Current Regulator for Flash LEDs
Typical Characteristics
Movie Mode Line Transient
Flash Turn On Characteristic
(IFLOUTX = 103mA/ch; VIN = 4.2V to 3.6V)
(IFLOUTX = 750mA/ch; VIN = 3.6V; L = 1µH)
0V
VFLEN
4.2V
3.6V
(5V/div)
VIN
VOUT
(2V/div)
(500mV/div)
0V
VSINK
IFLOUTx
(AC Coupled)
(50mA/div)
0V
(2V/div)
IFLOUTX
(1A/div)
0V
Time (50µs/div)
Time (50µs/div)
Movie Mode to Flash Turn On Characteristic
Movie Mode Turn On Characteristic
(IFLOUTX = 103mA to 750mA/ch; VIN = 3.6V; L = 1µH)
(IFLOUTX = 103mA/ch; VIN = 3.6V; L = 1µH)
VFLEN
SDA
(2V/div)
(5V/div)
0V
0V
VOUT
(2V/div)
VOUT
(2V/div)
2V
0V
VSINK
(500mV/div)
VSINK
(2V/div)
0V
0V
IFLOUTX
(1A/div)
IFLOUTX
(100mA/div)
0A
0A
Time (50µs/div)
Time (100µs/div)
Movie Mode Transition Characteristic
(IFLOUTX = 102mA to 188mA/ch; COUT = 0.22µF;
VIN = 3.6V; L = 1µH)
Flash Timeout vs. Temperature
(IFLOUTX = 750mA/ch; VIN = 3.6V; CT = 47nF)
500
450
400
350
300
250
200
SDA
(5V/div)
VOUT
(2V/div)
0V
0V
VSINK
(2V/div)
0V
0A
IFLOUTX
(100mA/div)
-40
-15
10
35
60
85
Temperature (°C)
Time (100µs/div)
w w w . a n a l o g i c t e c h . c o m
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1272.2009.04.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
