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参数资料
| 型号： | TC2574-VOETR |
| 元件分类： | 稳压器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SOIC-16 |
| 文件页数： | 15/26页 |
| 文件大小： | 221K |
| 代理商： | TC2574-VOETR |
TC2574
22
TC2574-2 12/22/00
0.5A Step-Down Switching Regulator
2001 Microchip Technology Inc.
DS21397A
TYPICAL CHARACTERISTICS (Circuit of Figure 2 Cont.)
I FB
,FEEDBACK
PIN
CURRENT
(nA)
A
B
C
TJ, JUNCTION TEMPERATURE (5C)
5
sec/DIV
5
sec/DIV
NORMALIZED
FREQUENCY
(%)
Figure 29. Oscillator Frequency
Figure 30. Switch Saturation Voltage
Figure 31. Minimum Operating V
Figure 32. Feedback Pin Current
oltage
Figure 33. Continuous Mode Switching Waveforms
VOUT = 5.0V, 500mA Load Current, L = 330HVOUT = 5.0V, 100mA Load Current, L = 100H
Figure 34. Discontinuous Mode Switching Waveforms
VIN = 1.23V
ILOAD = 100mA
VIN = 12 V
Normalized at 25
°C
Adjustable Version Only
A
B
C
A: Output Pin Voltage 10V/DIV.
B: Inductor Current, 0.2 A/DIV.
.
C: Output Ripple Voltage, 20mV/DIV, AC-Coupled
A: Output Pin Voltage 10V/DIV.
B: Inductor Current, 0.2 A/DIV.
.
C: Output Ripple Voltage, 20mV/DIV, AC-Coupled
8.0
6.0
4.0
2.0
0
–2.0
–4.0
–6.0
–8.0
10
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
80
60
40
20
0
–20
–0
–60
–80
–100
125
100
75
50
25
0
–25
–50
0
0.1
0.2
0.3
0.4
0.5
125
100
75
50
25
0
±25
±50
125
100
75
50
25
0
–25
–50
20V
10V
0
0.6A
0.4A
0.2A
0
20mV
AC
20V
10V
0
0.6A
0.4A
0.2A
0
20mV
AC
–40
°C
25
°C
125
°C
TJ JUNCTION TEMPERATURE (°C)
SWITCH CURRENT (A)
V
SAT,
SATURATION
VOLTAGE
(V)
V
IN,
INPUT
VOLTAGE
(V)
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