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參數(shù)資料
| 型號： | LM9036MM-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Ultra-Low Quiescent Current Voltage Regulator |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PDSO8 |
| 封裝： | MINI SOIC-8 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 167K |
| 代理商： | LM9036MM-5.0 |
Typical Performance Characteristics
(Continued)
Quiescent Current
Quiescent Current
20001113
20001114
Peak Output Current
20001117
Applications Information
Unlike other PNP low dropout regulators, the LM9036 re-
mains fully operational to 40V. Owing to power dissipation
characteristics of the package, full output current cannot be
guaranteed for all combinations of ambient temperature and
input voltage.
The junction to ambient thermal resistance
θ
rating has
two distinct components: the junction to case thermal resis-
tance rating
θ
; and the case to ambient thermal resistance
rating
θ
CA
. The relationship is defined as:
θ
JA
=
θ
JC
+
θ
CA
.
On the TO-252 package the ground tab is thermally con-
nected to the backside of the die. Adding 1 square inch of 2
oz. copper pad area directly under the ground tab will im-
prove the
θ
JA
rating to approximately 50C/W.
While the LM9036 has an internally set thermal shutdown
point of typically 150C, this is intended as a safety feature
only. Continuous operation near the thermal shutdown tem-
perature should be avoided as it may have a negative affect
on the life of the device.
Using the
θ
for a LM9036DT mounted on a circuit board as
defined at (Note 8), and using the formula for maximum
allowable dissipation given in (Note 3) for an ambient tem-
perature (T
) of +85C, we find that P
= 1.3W. Including
the small contribution of the quiescent current I
to the total
power dissipation, the maximum input voltage (while still
delivering 50mAoutput current) is 29.5V. The LM9036DT will
go into thermal shutdown when attempting to deliver the full
output current of 50mA, with an ambient temperature of
+85C, and the input voltage is greater than 29.5V. Similarly,
with an ambient temperature of 25C the P
= 2.5W, and
the LM9036DT can deliver the full output current of 50mA
with an input voltage of up to 40V.
While the LM9036 maintains regulation to 55V, it will not
withstand a short circuit above 40V because of safe operat-
ing area limitations in the internal PNP pass device. Above
55V the LM9036 will break down with catastrophic effects on
the regulator and possibly the load as well. Do not use this
device in a design where the input operating voltage may
exceed 40V, or where transients are likely to exceed 55V.
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM9036MMX-3.3 | 功能描述:低壓差穩(wěn)壓器 - 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 |
| LM9036MMX-3.3/NOPB | 功能描述:低壓差穩(wěn)壓器 - 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 |
| LM9036MMX-5.0 | 功能描述:低壓差穩(wěn)壓器 - 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 |
| LM9036MMX-5.0/NOPB | 功能描述:低壓差穩(wěn)壓器 - 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 |
| LM9036MX-3.3 | 功能描述:低壓差穩(wěn)壓器 - 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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