SC4524C Просмотр технического описания (PDF) - Semtech Corporation
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производитель
SC4524C Datasheet PDF : 22 Pages
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SC4524C
Typical Characteristics
Efficiency
90
85
VO =5V
VO =3.3V
80
VO =2.5V
75
70
VO =1.5V
65
Efficiency
90
85
80
VO =5V
75
VO =3.3V
70
VO =2.5V
65
Feedback Voltage vs Temperature
1.02
VIN =12V
1.01
1.00
60
60
0.99
55
1MHz,VIN =12V
50
D2 =20BQ030
45
55
50
1MHz, VIN =24V
D2 =20BQ030
45
0.98
40
40
0.97
0
0.5
1
1.5
2
0
0.5
1
1.5
2
-50 -25 0 25 50 75 100 125
Load Current (A)
Load Current (A)
Temperature (oC)
1000
Frequency Setting Resistor
vs Frequency
VIN =12V
100
10
1
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2
Frequency (MHz)
Frequency vs Temperature
1.2
Foldback Frequency vs VFB
1.25
1.1
ROSC =73.2k
1.0
ROSC =12.1k
0.9
0.8
-50 -25
0 25 50 75 100 125
Temperature (OC)
1
ROSC =73.2k
0.75
0.5
0.25
TA =25oC
ROSC =12.1k
0
0.00 0.20 0.40 0.60 0.80
VFB (V)
1.00
Switch Saturation Voltage
vs Switch Current
300
250
125oC
200
25o C
-40oC
150
100
Switch Current Limit vs Temperature
4.5
4.0
BST Pin Current vs Switch Current
100.0
75.0
VIN =12V
VBST =15V
3.5
50.0
-40oC
125oC
3.0
25.0
50
0.0 0.5 1.0 1.5 2.0 2.5
Switch Current (A)
2.5
-50 -25
0 25 50 75 100 125
Temperature (OC)
0.0
0 0.5 1 1.5 2 2.5 3
Switch Current (A)
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