參數(shù)資料
型號(hào)： ZLDO500T8
廠商： ZETEX PLC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 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
中文描述： 5 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO8
封裝： SMT-8
文件頁(yè)數(shù)： 6/9頁(yè)
文件大?。?/td> 113K
代理商： ZLDO500T8
1). Operation From A Low Voltage
Battery Pack
Fig.1 shows the ZLDO500 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 ZLDO500 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
output impedance of the switching power
supply but no higher. The low dropout
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO500
6V
C2
1uF
C1
10pF
C3
Output
+5V
0V
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO500
C2
1uF
C1
10pF
+ 12V Out
0V Out
C4
220uF
220uF
+ 5.0V Out
TR1
Feedback
Switching
Regulator
Voltage
D1
D2
Figure 2
ZLDO500
APPLICATIONS
Figure 1
4-85
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ZLDO500T8 制造商:Diodes Incorporated 功能描述:IC V REG LDO +5.V SMD SOIC8 500
ZLDO500T8/TATAPE/REEL 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM LDO VOLT REG +5.0V
ZLDO500T8TA 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 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(dòng)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
ZLDO500T8TC 功能描述:IC REG LDO 5V .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（最小）:- 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
ZLDRS1 制造商:Panasonic Industrial Company 功能描述:BADGE
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