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参数资料
| 型号： | LSP3126BSD |
| 厂商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 6/9页 |
| 文件大小： | 226K |
| 代理商： | LSP3126BSD |
Liteon Semiconductor Corporation
LSP3126B
Wide Input 2A Step Down Converter
Rev1.0
6/9
ESRCOUT
R
)
(
V
012
.
0
,
C
10
1
.
1
Min
OUT
6
×
≥
(12)
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
3.4k
2.2nF
None
3.3V
22F Ceramic
3.4k
3.3nF
None
5V
22F Ceramic
3.4k
4.7nF
47pF
2.5V
47F SP Cap
3.4k
2.2nF
None
3.3V
47F SP Cap
3.4k
3.3nF
None
5V
47F SP Cap
3.4k
4.7nF
47pF
2.5V
470F/6.3V/30m
3.4k
2.2nF
None
3.3V
470F/6.3V/30m
3.4k
3.3nF
None
5V
470F/10V/30m
3.4k
4.7nF
47pF
Table 2. Typical Compensation for Different Output Voltages and Output Capacitors
Figure 3 shows a sample LSP3126B application circuit generating 5V/2A output.
Figure3. LSP3126B 5V/2A Output Application
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