LM2576 Series
Block Diagram
V
IN
UNREGULATED
DC INPUT
C
IN
FEED-
BACK
1
+
INTERNAL
REGULATOR
ON/OFF
5
ON/OFF
4
R2
FIXED GAIN
ERROR AMP
R1
1.0k
+
-
COMPARATOR
DRIVER
3 AMP
SWITCH
OUTPUT
2
3
+
-
L1
V
OUT
+
D1
C
OUT
1.23V
52kHZ
BAND-GAP
REFERENCE OSCILLATOR
RESET
THERMAL
SHUTDOWN
CURRENT
LIMIT
GND
L
O
A
D
3.3V, R2 =1.7K
5V, R2 = 3.1K
12V, R2 = 8.84K
15V, R2 =11.3K
For ADJ, Version
R1 = Open, R2 =0Ω
Ordering information
Temperature
Range
-25°C
≤
T
A
≤
75°C
Output Voltage, V
3.3
LM2576SX-3.3
5.0
LM2576SX-5.0
12
LM2576SX-12
15
LM2576SX-15
ADJ
LM2576SX-ADJ
TO-263
Package Type
LM2576HVS-3.3 LM2576HVS-5.0 LM2576HVS-12 LM2576HVS-15 LM2576HVS-ADJ
LM2576T-3.3
LM2576T-5.0
LM2576T-12
LM2576T-15
LM2576T-ADJ
TO-220
LM2576HVT-3.3 LM2576HVT-5.0 LM2576HVT-12
LM2576HVT-15 LM2576HVT-ADJ
TIGER ELECTRONICS CO.,LTD
2