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參數(shù)資料
| 型號： | ZLDO485 |
| 廠商： | Zetex Semiconductor |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; Body Material:Thermoplastic; Series:C016; No. of Contacts:3; Connecting Termination:Screw; Circular Shell Style:Straight Receptacle; Features:Strain Relief with Clamping Ring RoHS Compliant: Yes |
| 中文描述： | 4.85伏超低壓差穩(wěn)壓器 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 114K |
| 代理商： | ZLDO485 |
ZLDO485
1). Operation From A Low Voltage
Battery Pack
Fig.1 shows the ZLDO485 regulator being used
to stabilise the output of a 6V battery pack. The
ultra low dropout voltage of only 100mV at full
load (300mA) given by the regulator allows the
minimum number of cells to be used in the
pack and also maximises the energy that can
be removed from the battery before the output
of the regulator starts to fail.
At a load current of 100mA the dropout voltage
falls to around 30mV. The endurance of the
battery pack is not only dependent on dropout
voltage. When operating, some low dropout
regulators can consume high quiescent
currents, sometimes approaching as much as
a tenth of their maximum load current
specification when approaching dropout
conditions. Despite its 300mA output rating,
when enabled the ZLDO485 consumes
typically only 630uA regulating normally and
3mA when the input falls too low for
regulation.
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 change 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
APPLICATIONS
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO485
6V
C2
C1
C3
Output
+ 4.85V
0V
Figure 1
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO485
C2
1uF
C1
10pF
+12V Out
0V Out
C4
220uF
C5
220uF
+4.85V Out
TR1
Feedback
Switching
Regulator
Voltage
D1
D2
Figure 2
4-76
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZLDO485T8 | Circular Connector; Body Material:Thermoplastic; Series:C016; No. of Contacts:3; Connecting Termination:Screw; Circular Shell Style:Cable Plug; Features:Strain Relief with Clamping Ring RoHS Compliant: Yes |
| ZLDO500 | Circular Connector; Body Material:Thermoplastic; Series:C016; No. of Contacts:3; Connecting Termination:Screw; Circular Shell Style:Cable Plug; Features:Internal Strain Relief with Clamping Ring; Leaded Process Compatible:Yes RoHS Compliant: Yes |
| ZLDO500T8 | Circular Connector; Body Material:Thermoplastic; Series:C016; No. of Contacts:6; Connecting Termination:Screw; Circular Shell Style:Right Angle Plug; Features:Strain Relief with Clamping Ring RoHS Compliant: Yes |
| ZLE10532 | DIGITAL SATELLITE TV FRONT-END REF ERENCE DESIGN |
| ZLLS1000 | 40V SILICON HIGH CURRENT LOW LEAKAGE SCHOTTKY DIODE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZLDO485T8 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:4.85 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO485T8TA | 功能描述:低壓差穩(wěn)壓器 - LDO 4.85V Ultra low Dropout Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| ZLDO485T8TA-CUT TAPE | 制造商:DIODES 功能描述:ZLDO485 Series 4.85 V 300 mA Ultra Low Dropout Regulator Surface Mount - SM-8 |
| ZLDO485T8TC | 功能描述:IC REG LDO 4.85V .3A SOT-223-8 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.8V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.3V @ 80mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:80mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| ZLDO500 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:5.0 VOLT ULTRA LOW DROPOUT REGULATOR |
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