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參數(shù)資料
| 型號(hào)： | ZLDO270T8 |
| 英文描述： | Obsolete |
| 中文描述： | 過時(shí) |
| 文件頁(yè)數(shù)： | 7/9頁(yè) |
| 文件大?。?/td> | 82K |
| 代理商： | ZLDO270T8 |
ZLDO270
3). Low Battery Flag
The ZLDO270 provides an output called Low
Battery Flag (LBF). Unlike many regulators that
only signal that they are falling out of regulation,
the LBF output of the ZLDO270 indicates that the
voltage drop across the regulator has fallen to
less than typically 200mV and so supply failure
is imminent.
This improved warning gives both more time for
the system supplied to shutdown gracefully and
maintains regulation while this happens. This
could be a vital point if measurements are under
way and must be completed accurately for
instance. The LBF output is driven by an open
collector NPN transistor which pulls low when
the supply to the regulator is failing. Figure 3
shows this output being used. Note that resistor
R1 is necessary only if the interrupt logic does
not include a pull-up resistor.
4). Over Temperature Shutdown
The ZLDO270 regulator includes an over
temperature shutdown circuit that disables the
regulator if its chip temperature should exceed
125°C for any reason. Although intended to
provide a limited guard against excessive internal
power dissipation, this circuit will shut down the
regulator if its ambient rises above 125°C.
Thus, the regulator could be used to disable a
circuit in the event of the ambient temperature
within which the circuit is mounted becoming
too high. Any internal power dissipation caused
as a result of supplying load current, will reduce
the ambient temperature at which shutdown
occurs. Note that to achieve the extremely low
dropout voltage and high current performance
provided by the ZLDO devices, the parts can be
damaged by sustained output shorts or
excessive loads when combined with high input
supply voltages. To ensure reliable operation,
keep loads within the SOA graph boundaries
indicated in the typical characteristics.
APPLICATIONS
Spg
D/C
Vout
LBF
SC
Vin
N/C
Gnd
ZLDO270
4.8V
C2
1μF
C1
10pF
C3
100nF
R1
100k
0V
+2.70V
Microproc.
System
Interrupt
Input
Figure 3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZLDO270T8TA | 功能描述:IC REG LDO 2.7V .3A SOT223-8 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(biāo)準(zhǔn)）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最小）: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(yīng)商設(shè)備封裝:PPAK 包裝:管件 其它名稱:497-3576-5 |
| ZLDO285 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:2.85 VOLT ULTRA LOW DROPOUT REGULATOR |
| ZLDO285T8 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:2.85 VOLT ULTRA LOW DROPOUT REGULATOR |
| 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(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):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(biāo)準(zhǔn)）:1.1V @ 1A 穩(wěn)壓器數(shù)量:2 電流 - 輸出:1A 電流 - 限制（最小）: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(yīng)商設(shè)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 |
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