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参数资料
| 型号： | TC2576VAT |
| 元件分类： | 稳压器 |
| 英文描述： | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| 封装： | TO-220, 5 PIN |
| 文件页数： | 16/25页 |
| 文件大小： | 213K |
| 代理商： | TC2576VAT |
23
TC2576
TC2576-2 12/04/00
3.0A Step-Down Switching Regulator
2001 Microchip Technology Inc.
DS21399A
TYPICAL CHARACTERISTICS (Circuit of Figure 2 Cont.)
2.0A
0
A
B
C
5
sec/DIV
100
sec/DIV
Figure 34. Switching Waveforms
Figure 35. Load Transient Response
VOUT = 15V
A: Output Pin Voltage, 10/DIV
B: Inductor Current, 2.0A/DIV
C: Inductor Current, 2.0A/DIV, AC-Coupled
D: Inductor Ripple Voltage, 50mV/dDIV, AC-Coupled
50V
0
4.0A
2.0A
100mV
Output
Voltage
Change
0
3.0A
2.0A
1.0A
0
4.0A
–100 mV
Load
Current
D
Horizontal Time Base: 5
sec/DIV
ET
,VOL
TAGE
TIME
(V
s)
100
80
90
3.0
2.5
1.5
0.8
0.5
0.4
0.6
1.0
2.0
5.0
60
40
20
15
10
8.0
7.0
6.0
MAXIMUM
INPUT
VOL
TAGE
(V)
IL, MAXIMUM LOAD CURRENT (A)
MAXIMUM
INPUT
VOL
TAGE
(V)
IL, MAXIMUM LOAD CURRENT (A)
MAXIMUM
INPUT
VOL
TAGE
(V)
Figure 36. TC2576 (VOUT = 3.3V)
TC2576 Series Buck Regulator Design Procedures (Cont.)
Indicator Value Selection Guide (For Continuous Mode Operation)
IL, MAXIMUM LOAD CURRENT (A)
Figure 37. TC2576 (VOUT = 5.0V)
L680
Figure 38. TC2576 (VOUT = 12.0V)
Figure 39. TC2576-ADJ
60
40
20
15
12
10
9.0
8.0
7.0
60
40
35
25
20
18
30
16
15
14
300
70
60
50
45
40
35
30
25
20
3.0
2.5
1.5
0.8
0.5
0.3
3.0
0.8
0.6
0.5
0.4
0.3
3.0
2.0
1.5
0.5
0.3
L330
L470
L150
L220
0.4
0.6
1.0
2.0
L100
L68
L47
H470
H1000
H680
H220
H330
H150
L680
L330
L470
L150
L220
L100
L68
L47
1.2
H470
H1000
H680
H220
H330
H150
L680
L330
L470
L150
L220
L100
L68
H1500
1.0
1.5
2.0
2.5
H680
H220
H330
H150
L680
L330
L150
L220
L100
L68
H1500
L470
H2000
L47
H470
H1000
150
200
250
0.4
0.6
0.8 1.0
2.5
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