SC4525CSETRT Semtech, SC4525CSETRT Datasheet - Page 7

• Manufacturer Part Number: SC4525CSETRT
• Description: IC BUCK ADJ 3A 8SOIC
• Manufacturer: Semtech
• Series: -r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of SC4525CSETRT

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1 V ~ 26.88 V
• Current - Output: 3A
• Frequency - Switching: 300kHz ~ 1.3MHz
• Voltage - Input: 3 V ~ 28 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SC4525CSETR

Typical Characteristics
1000
100
500
450
400
350
300
250
200
150
100
90
85
80
75
70
65
60
55
50
45
40
10
Curve 5
50
1
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
0
0
(8) OCP current
(2) 24Vin Eff
Frequency Setting Resistor
0.25 0.5 0.75 1
Switch Saturation Voltage
0.5
V
IN
25
=12V
vs Switch Current
Frequency (MHz)
Switch Current (A)
o
vs Frequency
Load Current (A)
C
1
Efficiency
1MHz, V
V
V
V
V
D
1.5
O
O
O
O
2
=3.3V
=2.5V
=1.5V
=5V
=B320A
125
1.25 1.5 1.75 2
IN
=12V
o
C
2
-40
2.5
o
SS270 REV 6-7
C
SS270 REV 6-7
SC4525A
3
1.2
1.1
1.0
0.9
0.8
5.2
4.8
4.4
4.0
3.6
3.2
90
85
80
75
70
65
60
55
50
45
40
Curve 6
Switch Current Limit vs Temperature
-50
Curve 3
-50
0
(9) BST Pin current
R
R
-25
OSC
OSC
-25
Frequency vs Temperature
0.5
=73.2k
=12.1k
Temperature (
0
Temperature (
0
Load Current (A)
1
Efficiency
25
25
1MHz, V
V
V
V
D
1.5
O
O
O
=5V
2
=3.3V
=2.5V
=B330A
50
50
IN
=24V
O
2
o
C)
C)
75
75
SS270 REV 6-7
SS270 REV 6-7
2.5
100 125
100 125
3
100.0
1.25
0.75
0.25
1.02
1.01
1.00
0.99
0.98
0.97
75.0
50.0
25.0
0.5
0.0
1
0
0.00
-50
BST Pin Current vs Switch Current
Feedback Voltage vs Temperature
0
R
OSC
Foldback Frequency vs V
V
0.5
V
R
-25
V
BST-SW
IN
OSC
0.20
=73.2k
IN
-40
=12V
=12V
=12.1k
Temperature (
1
Switch Current (A)
o
=5V
0
C
0.40
1.5
V
25
FB
125
2
(V)
50
0.60
o
C
T
2.5
A
=25
o
75
C)
o
0.80
3
C
100 125
FB
3.5
1.00
4
7