150KHZ 3A PWM BUCK DC/DC CONVERTER
FSP3122
TYPICAL PERFORMANCE CHARACTERISTICS
Normalized Output Voltage
Switch Saturation Voltage
1:-40℃
2:25℃
3:125℃
1.5
1.0
1.60
1.40
VIN=20V ILOAD=3A
VIN=12V
Normalixed at TJ=25℃
0.5
0
1.20
1.00
1
2
-0.5
0.80
0.60
-1.0
-1.5
3
0.5
1
2
3
SWITCH CURRENT(A)
100
125
-25
0
25 50 75
-50
JUNCTION TEMPERATURE(℃)
Dropout Voltage
Switching Frequency
1.8
1.6
160
L=33µH
RIND=0.04O
VOUT=VREG-50mV
155
1.4
1.2
1.0
150
145
140
ILOAD=3A
ILOAD=1A
0.8
0.6
135
130
100
100
125
-25
0
25 50 75
125
-50 -25
0
25 50 75
-50
JUNCTION TEMPERATURE(℃)
JUNCTION TEMPERATURE(℃)
2007-6-12
4/10