SC4525D 데이터 시트보기 (PDF) - Semtech Corporation
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SC4525D Datasheet PDF : 21 Pages
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(2) 5Vin Eff
(3) 3.3Vin Eff
SC4525D
Typical Characteristics
SC4525B
SC4525B
Efficie ncy
90
85
VO=3.3V
80
VO=2.5V
75
70
VO=1.5V
65
Efficie ncy
90
85
VO=3.3V
80
VO=2.5V
75
VO=1.5V
70
65
Efficiency
90
85
80
VO=2V
75
70
65
VO=1V
60
60
60
Temp
55
VIN=12V
50
45
(5) Freq vs D2=B320A Temp
55
55
VIN=5V
50
45
(6)
FoldD2b=Ba32c0Ak
Freq
vs
50
T45emp
VIN=3.3V
D2 =B320A
40
0 0.5 1 1.5 2 2.5 3
Load Current (A)
40
0 0.5 1 1.5 2 2.5 3
Load Current (A)
40
0 0.5 1 1.5 2 2.5 3
Load Current (A)
SS270 REV 6-7
SS270 REV 6-7
SS270 REV 6-7
Feedback Voltage vs Temperature
1.02
VIN =12V
1.01
1.00
0.99
0.98 (8) OCP current
Frequency vs Temperature
1.2
Foldback Frequency vs VFB
1.25
1
1.1
0.75
1.0
0.5
0.9 (9) BST Pin current 0.25
TA=25oC
0.97
-50 -25 0 25 50 75 100 125
0.8
-50 -25
SS270 REV 6-7
Te mperature (oC)
SS270 REV 6-7
0 25 50 75 100 125
Temperature (OC)
0
0.00 0.20 0.40 0.60 0.80 1.00
VFB (V)
Switch Saturation Voltage
vs Switch Current
500
450
400
125oC
350
300
250
25oC
200
-40oC
150
100
50
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Switch Current (A)
Switch Current Limit vs Temperature
5.2
4.8
4.4
4.0
3.6
BST Pin Current vs Switch Current
100.0
VIN =12V
VBST =15V
75.0
50.0
25.0
-40oC
125oC
3.2
-50 -25
0 25 50 75 100 125
Temperature (oC)
0.0
0 0.5 1 1.5 2 2.5 3 3.5 4
Switch Current (A)
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