AAT1235 Datasheet, PDF (7/21 Pages) Advanced Analogic Technologies – High Efficiency White LED Drivers for Backlight and Keypad

Typical Characteristics
Line Transient
(All Channels = 20mA)
4.5
4.0
3.5
3.0
14.2
14.1
14.0
13.9
13.8
Time (50µs/div)
AAT1235
High Efficiency White LED Drivers
for Backlight and Keypad
Enable Threshold Low vs.
Supply Voltage and Temperature
1.1
1.0
-40°C
0.9
0.8 25°C
0.7
+85°C
0.6
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Supply Voltage (V)
Enable Threshold High vs.
Supply Voltage and Temperature
1.2
1.1
-40°C
25°C
1.0
0.9
+85°C
0.8
0.7
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Supply Voltage (V)
Input Disconnect Switch Resistance vs.
Supply Voltage and Temperature
280
260
+120°C
240
+100°C
220
200
180 _+25°C
160
+85°C
140
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Supply Voltage (V)
Low Side Switch On Resistance
vs. Supply Voltage and Temperature
160
140
+120°C
120
+100°C
100
80
+25°C
60
+85°C
40
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Supply Voltage (V)
EN/SET (V)
20
10
V_OUT (V) ₀
I_INDUCTOR (A)
Soft Start Operation
(All Channels = 20mA)
2
0
0.5
0
Time (200µs/div)
1235.2007.02.1.1
7