SC4525CSETRT Semtech, SC4525CSETRT Datasheet - Page 6

• 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

Block Diagram
COMP
ROSC
SS/EN
FB
3
6
7
5
V1
FREQUENCY
+
-
+
FOLDBACK
EA
FAULT
FAULT
SS/EN
SS/EN
REFERENCE
SHUTDOWN
1V
& THERMAL
R
A1
Figure 3. Soft-start and Overload Hiccup Control Circuit
+
-
OSCILLATOR
1.9V
SLOPE
COMP
2.4mA
2.4mA
R
1.2V
I C
I C
+
S
FAULT
1.9V
1.9V
Figure 2. SC4525C Block Diagram
+
+
-
PWM
I D
I D
3.9mA
3.9mA
1V/2.15V
1V/2.15V
+
+
-
-
SOFT - START
B4
B4
B1
B1
OVERLOAD
CONTROL
HICCUP
AND
OC
S
R
CLK
Q
ILIM
+
-
S
S
R
R
Q
Q
_
_
18mV
B2
B2
B3
B3
ISEN
Q
Q
S
S
R
R
+
-
BST
8
OC
OC
PWM
PWM
OVERLOAD
OVERLOAD
GND
SW
IN
2
4
1
3.53m W
TRANSISTOR
POWER
SC4525C
6