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參數(shù)資料
| 型號： | R1221N26AC-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Voltage-Mode SMPS Controller |
| 中文描述： | 0.025 A SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 218K |
| 代理商： | R1221N26AC-TR |
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Rev. 1.11 - 10 -
3. Capacitor
As for C
IN
, use a capacitor with low ESR(Equivalent Series Resistance) and a capacity of at least 10
m
F for stable
operation.
C
OUT
can reduce ripple of Output Voltage, therefore 47
m
F to 100
m
F tantalum type is recommended.
4. Lx Transistor
Pch Power MOS FET is required for this IC.
Its breakdown voltage between gate and source should be a few volt higher than Input Voltage.
In the case of Input Voltage is low, to turn on MOS FET completely, select a MOS FET with low threshold voltage.
If a large load current is necessary for your application and important, choose a MOS FET with low ON resistance
for good efficiency.
If a small load current is mainly necessary for your application, choose a MOS FET with low gate capacity for good
efficiency.
Maximum continuous drain current of MOS FET should be larger than peak current, ILmax.
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