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參數(shù)資料
| 型號： | L6920D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.2 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 4.40 MM, TSSOP-8 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 318K |
| 代理商： | L6920D |
L6920
6/13
Figure 7. PFM mode Condition: Vout = 5V; Vin =1.5V.
Trace1: Vout (50mV~/div) Trace 4: IL (100mA/div)
Time div.: 5
s/div
Figure 8. Heavier load - Train pulses overlapping.
Trace1: Vout (100mV~/div) Trace 4: IL (200mA/div)
Time div.: 10
s/div
Figure 9. Heavy load - Inductor current ripples
below Ilim Trace1: Vout (100mV~/div) Trace 4: IL
(200mA/div) Time div.: 20
s/div
Figure 10. Heavy load and High ESR. Regulation
falls in continuous mode of operation. Trace1:
Vout (100mV~/div) Trace 4: IL (200mA/div). Time
div.: 5
s/div
When Iload is heavier, the pulse trains are overlapped. Figures 7 - 8 show some possible behaviors.
Considering that current in the inductor is limited to 1A, the maximum load current is defined by the following
relationship:
eq. (1)
Where
η is the efficiency and Ilim =1A.
Of course, if Iload is greater than Iload_lim the regulation is lost (figure 11).
I
load_lim
V
in
V
out
-----------
I
lim Toff min
–
V
out
V
in
–
2L
--------------------------
η
=
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6920DB | 功能描述:直流/直流開關轉換器 Synchronous Rectifer Step Up Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| L6920DBTR | 功能描述:直流/直流開關轉換器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| L6920DC | 功能描述:直流/直流開關調節(jié)器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6920DCTR | 功能描述:直流/直流開關調節(jié)器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6920DTR | 功能描述:直流/直流開關轉換器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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