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參數(shù)資料
| 型號： | ZXCL280 |
| 廠商： | Zetex Semiconductor |
| 英文描述： | 71-254614-19S |
| 中文描述： | 超小型微功耗采用SC70低壓降穩(wěn)壓器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 374K |
| 代理商： | ZXCL280 |
APPLICATIONS INFORMATION
Enable Control
A TTL compatible input is provided to allow the
regulator to be shut down. A low voltage on the Enable
pin puts the device into shutdown mode. In this mode
the regulator circuit is switched off and the quiescent
current reduces to virtually zero (typically less than
10nA). A high voltage on the Enable pin ensures
normal operation.
The Enable pin can be connected to V
IN
or driven from
an independent source of up to 10V maximum. (e.g.
CMOS logic) for normal operation. There is no clamp
diode from the Enable pin to V
IN
, so the V
IN
pin may be
atanyvoltagewithinitsoperatingrangeirrespectiveof
the voltage on the Enable pin.
Current Limit
The ZXCL devices include a current limit circuit which
restricts the maximum output current flow to typically
230mA. Practically the range of over-current should be
considered as minimum 160mA to maximum 800mA.
The device
’
s robust design means that an output short
circuit to any voltage between ground and V
OUT
can be
tolerated for an indefinite period.
Thermal Overload
Thermaloverloadprotectionisincludedonchip.When
the device junction temperature exceeds a minimum
125
°
C the device will shut down. The sense circuit will
re-activate the output as the device cools. It will then
cycle until the overload is removed. The thermal
overload protection will be activated when high load
currents or high input to output voltage differentials
cause excess dissipation in the device.
Start up delay
AsmallamountofhysteresisisprovidedontheEnable
pin to ensure clean switching. This feature can be used
to introduce a start up delay if required. Addition of a
simple RC network on the Enable pin provides this
function. The following diagram illustrates this circuit
connection.Theequationprovidedenablescalculation
of the delay
period.
ISSUE 5 - NOVEMBER 2001
8
ZXCL250 ZXCL260 ZXCL280
ZXCL300 ZXCL330 ZXCL400
R
C
Figure 1 Circuit Connection
T
d
T
= RCIn
V
V
1.5
d(NOM)
IN
IN
Calculation of start up delay as above
Figure 2 Start up delay (T
d
)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZXCL280E5 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:MICROPOWER SC70-5 & SOT23-5 LOW DROPOUT REGULATORS |
| ZXCL280E5TA | 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 150mA Sgl LDO 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 |
| ZXCL280E5TA | 制造商:Diodes Incorporated 功能描述:V REG LDO +2.8V SOT-23-5-5 280 |
| ZXCL280H5 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:ULTRA SMALL MICROPOWER SC70 LOW DROPOUT REGULATORS |
| ZXCL280H5TA | 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 150mA Sgl LDO 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 |
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