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LM2575D2T-015G 데이터시트(PDF) 22 Page - ON Semiconductor

부품명 LM2575D2T-015G
상세설명  1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
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제조업체  ONSEMI [ON Semiconductor]
홈페이지  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LM2575D2T-015G 데이터시트(HTML) 22 Page - ON Semiconductor

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LM2575, NCV2575
http://onsemi.com
22
Figure 32. Undervoltage Lockout Circuit for
Buck−Boost Converter
R2
15 k
Z1
1N5242B
R1
15 k
Q1
2N3904
R3
68 k
Vth ≈ 13 V
Cin
100
mF
LM2575−5.0
1
3
5
GND
ON/OFF
+Vin
+Vin
Vout = -5.0 V
NOTE: This picture does not show the complete circuit.
Adjustable Output, Low−Ripple Power Supply
A 1.0 A output current capability power supply that
features an adjustable output voltage is shown in Figure 33.
This regulator delivers 1.0 A into 1.2 V to 35 V output.
The input voltage ranges from roughly 8.0 V to 40 V. In order
to achieve a 10 or more times reduction of output ripple, an
additional L−C filter is included in this circuit.
Figure 33. Adjustable Power Supply with Low Ripple Voltage
D1
1N5819
L1
150
mH
Output
2
4
Feedback
R2
50 k
R1
1.1 k
L2
20
mH
Regulated
Output Voltage
1.2 V to 35 V @1.0 A
Optional Output
Ripple Filter
Unregulated
DC Input
+
Cout
2200
mF
C1
100
mF
Cin
100
mF
/50 V
LM2575−Adj
1
5
3ON/OFF
GND
+Vin
30
40
50
60
70
80
1.0
1.5
2.0
2.5
3.0
3.5
010
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
Minimum
Size Pad
2.0 oz. Copper
L
L
Free Air
Mounted
Vertically
Figure 34. D2PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
PD(max) for TA = 50°C
RqJA


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