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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： | 2/26页 |
| 文件大小： | 221K |
| 代理商： | TC2574-VOETR |
TC2574
10
TC2574-2 12/22/00
0.5A Step-Down Switching Regulator
2001 Microchip Technology Inc.
DS21397A
Procedure (Adjustable Output Version: TC2574-ADJ) (Continued)
Procedure
Example
5. Output Capacitor Selection (COUT )
A. Since the TC2574 is a forward–mode switching regulator
with voltage mode control, its open loop 2–pole–1–zero
frequency characteristic has the dominant pole–pair
determined by the output capacitor and inductor values.
For stable operation, the capacitor must satisfy the
following requirement:
COUT ≥ 13,000
VIN(max)
[
F]
VOUT x L[F]
B. Capacitor values between 10
F and 2000F will satisfy
the loop requirements for stable operation. To achieve an
acceptable output ripple voltage and transient
response, the output capacitor may need to be several
times larger than the above formula yields.
C. Due to the fact that the higher voltage electrolytic capaci-
tors generally have lower ESR (Equivalent Series
Resistance) numbers, the output capacitor’s voltage
rating should be at least 1.5 times greater than the output
voltage. For a 5.0V regulator, a rating of at least 8.0V is
appropriate, and a 10V or 16V rating is recommended.
5. Output Capacitor Selection (COUT )
A.
COUT ≥ 13,300 x
40
22.2
F
24 x 1000
To achieve an acceptable ripple voltage, select COUT
100
F electrolytic capacitor.
Table 1. Diode Selection Guide gives an overview about through-hole diodes for an effective design.
1.0 Amp Diodes
VR
Schottky
Fast Recovery
20V
1N5817
MBR120P
30V
1N5818
MUR110
MBR130P
(rated to 100V)
40V
1N5819
MBR140P
50V
MBR150
60V
MBR160
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相关代理商/技术参数 |
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|---|---|
| TC2574VPA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TC2574-VPA | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:0.5A Step-Down Switching Regulator |
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| TC2575-12.0VAT | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
| TC2575-3.3VAT | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
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