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參數(shù)資料
| 型號(hào)： | L6920 |
| 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)： | 9/12頁 |
| 文件大小： | 162K |
| 代理商： | L6920 |
L6920
6/12
Figure 5.1. 1 PFM mode Condition: Vout = 5V; Vin
=1.5V. Trace1: Vout (50mV~/div) Trace
4: IL (100mA/div) Time div.: 5
s/div
Figure 5.2. Heavier load - Train pulses overlapping.
Trace1: Vout (100mV~/div) Trace 4: IL
(200mA/div) Time div.: 10
s/div
When Iload is heavier, then train pulses are over-
lapped. Figures 5.2 - 5.4 show some possible behav-
iors.
Figure 5.3. Heavy load - Inductor current ripples
below Ilim Trace1: Vout (100mV~/div)
Trace 4: IL (200mA/div) Time div.: 20 s/div
Figure 5.4. 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
Considering that current in the inductor is limited to
1A, the maximum load current is defined by the fol-
lowing relationship:
eq. (1)
Where h is the efficiency and Ilim =1A.
Of course, if Iload is greater than Iload_lim the regu-
lation is lost (figure 6).
I
lo ad_lim
V
in
V
out
-----------
I
lim
V
out
V
in
–
2L
--------------------------
–
η
=
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參數(shù)描述 |
|---|---|
| L6920D | 功能描述:直流/直流開關(guān)轉(zhuǎn)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(guān)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(fēng)格:SMD/SMT |
| L6920DB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Synchronous Rectifer Step Up Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| L6920DBTR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| L6920DC | 功能描述:直流/直流開關(guān)調(diào)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(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6920DCTR | 功能描述:直流/直流開關(guān)調(diào)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(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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