- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382764 > ZLDO285T8 Obsolete PDF資料下載
參數(shù)資料
| 型號： | ZLDO285T8 |
| 英文描述： | Obsolete |
| 中文描述： | 過時 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 82K |
| 代理商： | ZLDO285T8 |
ZLDO270
1). Simple 2.70V Supply
Using a circuit such as Figure 1, the ZLDO270 can
easily provide a 2.70V logic supply from an
available 5V rail where most standard regulators
could not guarantee correct operation. Although
this approach is not particularly energy efficient,
if the load taken at 2.70V is not too large, then the
added complexity and cost of a 2.70V switching
converter may not be justifiable and so this linear
solution can be preferable. This circuit will also
give far less noise than a switching regulator
which can be important when handling low level
analogue signals or low voltage measurements.
2). Post Converter Regulation
A common problem with multiple output switch
mode converters is that only one output can be
used in the feedback control loop of the switching
regulator. Thus only one output is fully regulated.
All other outputs are prone to tracking errors that
occur if the load on any output changes
significantly. By ensuring close coupling of all
transformer windings and minimising the
impedance of all outputs, these errors can be
reduced but never eliminated. A simple way
round this problem is to wind the switching
regulator transformer to give a slightly higher
voltage than required and regulate down from
this to the desired voltage with a linear regulator.
This is indicated in Figure 2. To keep losses low
and so maintain the advantages of a switch
mode supply, it is important that the voltage drop
across this regulator is kept as low as possible,
i.e. just high enough to compensate for the poor
output impedance of the switching power supply
but no higher. The low dropout voltage of the
ZLDO270 allows this circuit technique to be
implemented very effectively, giving a highly
stable and accurate low noise supply.
APPLICATIONS
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
IC1
C2
C1
C3
+5V In
+5V Out
+2.70V Out
0V Out
0V In
Figure 1
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO270
C2
1μF
C1
10pF
+5V Out
0V Out
C4
220μF
220μF
+2.70V Out
TR1
Feedback
Switching
Regulator
Voltage
D1
D2
Figure 2
相關PDF資料 |
PDF描述 |
|---|---|
| ZLDO300T8 | Obsolete |
| ZLNB2006Q20 | |
| ZLNB2009Q20 | |
| ZLNB2010Q16 | |
| ZM168PKZ2 | DIST PROT BLOCK 10 16A |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ZLDO285T8TA | 功能描述:IC REG LDO 2.85V .3A SOT223-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正，固定式和可調(diào)式 輸出電壓:3.3V，1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降（標準）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5，DPak（4 引線 + 接片），TO-252AD 供應商設備封裝:PPAK 包裝:管件 其它名稱:497-3576-5 |
| ZLDO300 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.0 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO300T8 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.0 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO300T8TA | 功能描述:IC REG LDO 3V .3A SOT223-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正，固定式和可調(diào)式 輸出電壓:3.3V，1.25 V ~ 5.7 V 輸入電壓:4.5 V ~ 7 V 電壓 - 壓降（標準）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最?。?1A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-5，DPak（4 引線 + 接片），TO-252AD 供應商設備封裝:PPAK 包裝:管件 其它名稱:497-3576-5 |
| ZLDO330 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:3.3 VOLT ULTRA LOW DROPOUT REGULATOR |
發(fā)布緊急采購，3分鐘左右您將得到回復。