SC2308A Datasheet, PDF (5/17 Pages) Semtech Corporation – 600kHz Step-Up Switching Regulator with 2.2A, 45V Switch

SC2308A
Typical Characteristics
Efficiency vs Load Current
V_OUT = 5V
100
90
V_IN = 3.3V
80
70
60
50
40
30
20
0
200 400 600 800 1000 1200
Load Current (mA)
Percentage Frequency
Variation vs Temperature
5
V_IN = 3V
0
-5
-10
-15
-50 -25
0 25 50 75 100 125
Temperature (^oC)
100
90
80
70
60
50
40
30
20
0
E fficiency vs Load C urrent
V_OUT = 12V
V _IN = 5V
V _IN = 3.3V
200
400
600
800
Load Current (mA)
Switc h Saturation
Voltage vs Switc h Curre nt
500
V _IN = 3V
105^oC
400
25^oC
300
200
-45^oC
100
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
S witch Current (A)
Feedback Voltage vs Temperature
1.23
V_IN = 3V
1.22
1.21
1.20
-50 -25
0 25 50 75 100 125
Temperature (^oC)
Switch Current Limit vs Temperature
3.0
2.8
2.6
2.4
V_IN = 3V
2.2
2.0
-50 -25
0 25 50 75
Temperature (^oC)
100 125
IN Pin Curre nt v s Switc h Curre nt
80
V _IN = 3V
60
40
20
25^oC
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
S witch Current (A)
Error Amplifier Open-Loop
Gain vs Temperature
55
V_IN = 3V
50
45
40
-50 -25
0 25 50 75 100 125
Temperature (^oC)
Error Amplifier
Transconductance vs Temperature
50
V_IN = 3V
45
40
35
30
25
20
-50 -25
0 25 50 75 100 125
Temperature (^oC)