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參數(shù)資料
| 型號： | LM9076M |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output |
| 中文描述： | 150mA的超低靜態(tài)電流LDO穩(wěn)壓器的延遲復(fù)位輸出 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 259K |
| 代理商： | LM9076M |
Application Information
(Continued)
RESET DELAY TIME
When the regulator output is switched On, or after recovery
from brief V
OUT
fault condition, the RESET flag can be can
be programmed to remain low for an additional delay time.
This will give time for any system reference voltages, clock
signals, etc., to stabilize before the micro-controller resumes
normal operation.
This delay time is controlled by the capacitor value on the
C
pin. During normal operation the C
DELAY
capacitor is
charged to near V
. When a V
RESET pin to go low, the C
capacitor is quickly dis-
charged to ground. When the V
fault is removed, and
V
returns to the normal operating value, the C
capacitor begins charging at a typical constant 0.420uA rate.
When the voltage on the C
capacitor reaches the same
potential as the V
OUT
pin the RESET pin will be allowed to
return high.
The typical RESET delay time can be calculated with the
following formula:
t
DELAY
= V
OUT
X (C
DELAY
/ I
DELAY
)
For a C
value of 0.001uF and a I
DELAY
value of
0.475uA the typical RESET delay time is:
t
DELAY
= V
OUT
X (0.001uF / 0.475uA)
t
DELAY
= 5.0V X (0.001uF / 0.420uA) = 11.9ms
THERMAL PROTECTION
Device operational range is limited by the maximum junction
temperature (T
). The junction temperature is influenced by
the ambient temperature (T
A
), package selection, input volt-
age (V
IN
), and the output load current. When operating with
maximum load currents the input voltage and/or ambient
temperature will be limited. When operating with maximum
input voltage the load current and/or the ambient tempera-
ture will be limited.
Even though the LM9076 is equipped with circuitry to protect
itself from excessive thermal dissipation, it is not recom-
mended that the LM9076 be operated at, or near, the maxi-
mum recommended die junction temperature (T
J
) as this
may impair long term device reliability.
The thermal protection circuity monitors the temperature at
the die level. When the die temperature exceeds typically
160C the voltage regulator output will be switched off.
L
www.national.com
6
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| LM9076QBMA-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 |
| LM9076QBMA-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 |
| LM9076QBMAX-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 |
| LM9076QBMAX-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 |
| LM9076QSX-3.3 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output |
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