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LM2576T-3.3 Scheda tecnica(PDF) 2 Page - Motorola, Inc

Il numero della parte LM2576T-3.3
Spiegazioni elettronici  Easy Switcher 3.0A Step-Down Voltage Regulator
Download  28 Pages
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Produttore elettronici  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

LM2576T-3.3 Scheda tecnica(HTML) 2 Page - Motorola, Inc

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LM2576
2
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Block Diagram and Typical Application
7.0 V – 40 V
Unregulated
DC Input
L1
100
µH
Gnd
+Vin
1
Cin
100
µF
3ON/OFF
5
Output
2
Feedback
4
D1
1N5822
Cout
1000
µF
Typical Application (Fixed Output Voltage Versions)
Representative Block Diagram and Typical Application
Unregulated
DC Input
+Vin
1
Cout
Feedback
4
Cin
L1
D1
R2
R1
1.0 k
Output
2
Gnd
3
ON/OFF
5
Reset
Latch
Thermal
Shutdown
52 kHz
Oscillator
1.235 V
Band–Gap
Reference
Freq
Shift
18 kHz
Comparator
Fixed Gain
Error Amplifier
Current
Limit
Driver
1.0 Amp
Switch
ON/OFF
3.1 V Internal
Regulator
Regulated
Output
Vout
Load
Output
Voltage Versions
3.3 V
5.0 V
12 V
15 V
R2
(
Ω)
1.7 k
3.1 k
8.84 k
11.3 k
For adjustable version
R1 = open, R2 = 0
LM2576
5.0 V Regulated
Output 3.0 A Load
ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond
which damage to the device may occur.)
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
R
θJA
65
°C/W
Thermal Resistance, Junction–to–Case
R
θJC
5.0
°C/W
Case 936A (D2PAK)
PD
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
R
θJA
70
°C/W
Thermal Resistance, Junction–to–Case
R
θJC
5.0
°C/W
Storage Temperature Range
Tstg
–65 to +150
°C
Minimum ESD Rating (Human Body Model:
C = 100 pF, R = 1.5 k
Ω)
2.0
kV
Lead Temperature (Soldering, 10 seconds)
260
°C
Maximum Junction Temperature
TJ
150
°C
NOTE: ESD data available upon request.


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