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LM2596 数据表(PDF) 2 Page - ON Semiconductor

部件名 LM2596
功能描述  3.0 A, Step-Down Switching Regulator
Download  25 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

LM2596 数据表(HTML) 2 Page - ON Semiconductor

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LM2596
http://onsemi.com
2
Figure 1. Typical Application and Internal Block Diagram
12 V
Unregulated
DC Input
L1
33
mH
GND
+Vin
1
Cin
100
mF
3ON/OFF
5
Output
2
Feedback
4
D1
1N5822
Cout
220
mF
Typical Application (Adjustable Output Voltage Version)
Block Diagram
Unregulated
DC Input
+Vin
1
Cout
Feedback
4
Cin
L1
D1
R2
R1
Output
2
GND
3
ON/OFF
5
Reset
Latch
Thermal
Shutdown
150 kHz
Oscillator
1.235 V
Band-Gap
Reference
Freq
Shift
30 kHz
Comparator
Fixed Gain
Error Amplifier
Current
Limit
Driver
3.0 Amp
Switch
ON/OFF
3.1 V Internal
Regulator
Regulated
Output
Vout
Load
LM2596
5.0 V Regulated
Output 3.0 A Load
R1
R2
3.1k
1.0k
CFF
CFF
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Maximum Supply Voltage
Vin
45
V
ON/OFF Pin Input Voltage
−0.3 V ≤ V ≤ +Vin
V
Output Voltage to Ground (Steady−State)
−1.0
V
Power Dissipation
Case 314B and 314D (TO−220, 5−Lead)
PD
Internally Limited
W
Thermal Resistance, Junction−to−Ambient
RqJA
65
°C/W
Thermal Resistance, Junction−to−Case
RqJC
5.0
°C/W
Case 936A (D2PAK)
PD
Internally Limited
W
Thermal Resistance, Junction−to−Ambient
RqJA
70
°C/W
Thermal Resistance, Junction−to−Case
RqJC
5.0
°C/W
Storage Temperature Range
Tstg
−65 to +150
°C
Minimum ESD Rating (Human Body Model: C = 100 pF, R = 1.5 kW)
2.0
kV
Lead Temperature (Soldering, 10 seconds)
260
°C
Maximum Junction Temperature
TJ
150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.


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