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SC4525ASETRT Datenblatt(PDF) 7 Page - Semtech Corporation

Teilenummer SC4525ASETRT
Bauteilbeschribung  28V 3A Step-Down Switching Regulator
PDF  19 Pages
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Hersteller  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4525ASETRT Datenblatt(HTML) 7 Page - Semtech Corporation

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SC4525A
7
Typical Characteristics
(1)12Vin Eff
Efficiency
40
45
50
55
60
65
70
75
80
85
90
0
0.5
1
1.5
2
2.5
3
Load Current (A)
SC4525A
VIN=12V
1MHz
VO=5V
VO=3.3V
VO=2.5V
VO=1.5V
(7) Vcesat
Switch Saturation Voltage
vs Switch Current
50
100
150
200
250
300
350
400
450
500
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Switch Current (A)
SS270 REV 6-7
-40oC
125oC
25oC
(4)
Frequency Setting Resistor
vs Frequency
1
10
100
1000
0
0.5
1
1.5
2
2.5
Frequency (MHz)
SS270 REV 6-7
VIN =12V
(3)
Feedback Voltage vs Temperature
0.97
0.98
0.99
1.00
1.01
1.02
-50 -25
0
25
50
75 100 125
Temperature (oC)
SS270 REV 6-7
VIN =12V
(9) BST Pin current
BST Pin Current vs Switch Current
0.0
25.0
50.0
75.0
100.0
0 0.5 1 1.5 2 2.5 3 3.5 4
Switch Current (A)
-40oC
125oC
VIN =12V
VBST-SW =5V
(6)
Foldback Frequency vs VFB
0
0.25
0.5
0.75
1
1.25
0.0
0.2
0.4
0.6
0.8
1.0
VFB (V)
TA =25oC
ROSC=12.1k
ROSC=93.1k
(2) 24Vin Eff
Efficiency
40
45
50
55
60
65
70
75
80
85
90
0
0.5
1
1.5
2
2.5
3
Load Current (A)
SC4525A
VIN=24V
1MHz
VO=5V
VO=3.3V
VO=2.5V
(8) OCP current
Switch Current Limit vs Temperature
4.0
4.2
4.4
4.6
4.8
5.0
-50 -25
0
25
50
75 100 125
Temperature (oC)
SS270 REV 6-7
(5)
Frequency vs Temperature
0.8
0.9
1.0
1.1
1.2
-50 -25
0
25
50
75 100 125
Temperature (oC)
SS270 REV 6-7
ROSC=12.1k
ROSC=93.1k



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