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參數(shù)資料
| 型號： | L6920D |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER |
| 中文描述： | 1V的高效SYNCRONOUS升壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 166K |
| 代理商： | L6920D |
L6920
8/12
Figure 7. Demoboard Circuit
R4, R5 should be selected in the range of 100k
- 10M
to minimize consumption and error due to current sunk
by FB pin (few nA).
Output capacitor selection
The output capacitor affects both efficiency and output ripple so its choice has to be considered with particular
care.
The capacitance value should be in the range of about 10
μ
F-100
μ
F.
An additional, smaller, low ESR capacitor can be in parallel for high frequency filtering. A typical value can be
around 1
μ
F.
If very high performances, in terms of efficiency and output voltage ripple, are required, a very low ESR capac-
itor has to be chosen.
Ceramic capacitors are the lowest ESR but they are very expensive.
Other possibilities are low-ESR tantalum capacitors, available from KEMET, AVX and other sources. POSCAP
capacitors from SANYO and polymeric capacitors from PANASONIC are also good.
Below there is a list of some capacitors suppliers. The cap values and rated voltages are only a suggested pos-
sibility
Jumper
Position
Function
J1
1-2
Device enabled
2-3
Device disabled
J2
None
Adjustable using R4 and R5 [not
mounted]
1-2
3.3V output voltage
2-3
5V output voltage
L1 10
μ
H
+VBATT
+VBATT
VBATT
F.B.
VOUT
7
1
8
GND
Panasonic
ELL6RH100M
Panasonic
EEFCDJ470R
Panasonic
EEFCDJ470R
C2
47
μ
F
C3
N.C.
C1
47
μ
F
C4
100nF
R1
N.C.
R3
N.C.
R2
N.C.
not mounted components
R4 N.C.
R5 N.C.
VOUT
GND
1
2
3
3
2
J2
J1
1
LBO
3
SHDN
5
VREF
GND
4
6
LBI
2
LBO
SHDN
L6920
D01IN1310
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| L6920DTR | 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 |
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