LTC3452_15 Datasheet, PDF (4/16 Pages) Linear Technology – Synchronous Buck-Boost MAIN/CAMERA White LED Driver

LTC3452
TYPICAL PERFOR A CE CHARACTERISTICS
Shutdown Current vs Temperature
20
18
16
14
12 VIN = 5.5V
10
V_IN = 4.2V
8
6
4
V_IN = 2.7V
2
V_IN = 3.6V
0
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3452 G01
Shutdown Current vs V_IN
12
T_A = 25°C
10
8
6
4
2
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3452 G02
Undervoltage Lockout Threshold
vs Temperature
2.5
2.3
2.1
V_IN RISING
1.9
V_IN FALLING
1.7
1.5
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3452 G03
Enable Thresholds vs Temperature
1200
1100 ^{VIN = 3.6V}
1000
900
800
700
600
V_IH
500
V_IL
400
300
200
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3452 G04
Enable Thresholds vs V_IN
1000
T_A = 25°C
900
800
700
600
V_IH
500
V_IL
400
300
200
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3452 G05
I_SETL,H Servo Voltage
vs Temperature
812
V_IN = 3.6V
808 ^{RISETL = 10.2k}
R_ISETH = 4.99k
804
800
796
792
788
784
780
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3452 G06
I_SETL,H Servo Voltage vs V_IN
812
T_A = 25°C
808
804
800
796
792
788
784
780
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3452 G07
Maximum Regulated V_OUT
vs Temperature
4.60
V_IN = 3.6V
4.58
4.56
4.54
4.52
4.50
4.48
4.46
4.44
4.42
4.40
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3452 G08
3452f
4