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參數(shù)資料
| 型號： | LSP3171MSAD |
| 廠商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 470 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 330K |
| 代理商： | LSP3171MSAD |
Liteon Semiconductor Corporation
LSP3171
MSOP10L 2A Step Down DC/DC Converter
Rev1.4
6/9
And the proper value for CCOMP2 is:
COMP
ESRCOUT
OUT
2
COMP
R
C
=
(13)
Though CCOMP2 is unnecessary when the output capacitor has sufficiently low ESR, a small value CCOMP2 such as
100pF may improve stability against PCB layout parasitic effects.
Table 2 shows some calculated results based on the compensation method above.
VOUT
COUT
RCOMP
CCOMP
CCOMP2
2.5V
22F Ceramic
7.5k
2.2nF
None
3.3V
22F Ceramic
10k
1.5nF
None
5V
22F Ceramic
10k
2.2nF
None
2.5V
47F SP Cap
10k
10nF
None
3.3V
47F SP Cap
10k
15nF
None
5V
47F SP Cap
10k
22nF
None
2.5V
470F/6.3V/30m
10k
39nF
None
3.3V
470F/6.3V/30m
10k
47nF
None
5V
470F/10V/30m
10k
56nF
None
Table 2. Typical Compensation for Different Output Voltages and Output Capacitors
Figure 3 shows a sample LSP3171 application circuit generating 5V/2A output.
Figure3. LSP3171 5V/2A Output Application
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