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參數(shù)資料
| 型號： | LP3981IMMX-3.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Micropower, 300mA Ultra Low-Dropout CMOS Voltage |
| 中文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 339K |
| 代理商： | LP3981IMMX-3.0 |
Electrical Characteristics
(Continued)
Unless otherwise specified: V
= 1.2V, V
= V
+ 0.5V, C
= 2.2 μF, C
= 0.033 μF, I
= 1mA, C
= 2.2 μF. Typi-
cal values and imits appearing in standard typeface are for T
= 25C. Limits appearing in
boldface type
apply over the entire
junction temperature range for operation, 40C to +125C. (Notes 6, 7)
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
T
ON
Turn-On Time
(Note 10) (Note 11)
C
BYPASS
= 0.033 μF
240
350
μs
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2:
All voltages are with respect to the potential at the GND pin.
Note 3:
The figures given for Absolute Maximum Power disipation for the device are calculated using the following equations:
where T
J(MAX)
is the maximum junction temperature, T
A
is the ambient temperature, and
θ
JA
is the junction-to-ambient thermal resistance.
E.g. for the LLP package
θ
=50C/W, T
=150C and using T
=25C the maximum power dissipation is found to be 2.5W. The derating factor (1/
θ
) =
20mW/C, thus below 25C the power dissipation figure can be increased by 20W per degree, and similarity decreased by this factor for temperatures above 25C
Note 4:
The human body model is 100pF discharged through 1.5k
resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each
pin.
Note 5:
As for the Maximum Power dissipation, the maximum power in operation is dependant on the ambient temperature. This can be calculated in teh same way
using T
J
=125C, giving 2W as the maximum power dissipation for the LLP package in operation. The same derating factor applies.
Note 6:
All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with T
= 25C or correlated using
Statistical Quality Control (SQC) methods. All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations
and applying statistical process control.
Note 7:
The target output voltage, which is labeled V
OUT(nom)
, is the desired voltage option.
Note 8:
An increase in the load current results in a slight decrease in the output voltage and vice versa.
Note 9:
Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification does not apply for
input voltages below 2.5V.
Note 10:
Guaranteed by design.
Note 11:
Turn-on time is time measured between the enable input just exceeding V
IH
and the output voltage just reaching 95% of its nominal value.
Note 12:
For V
OUT
>
2.5C, Increase I
Q(MAX)
by 2.5μA for every 0.1V increase in V
OUT(NOM)
.
i.e. I
Q(MAX)
= 210 + ((V
OUT(NOM)
- 2.5) * 25)μA
Output Capacitor, Recommended Specification
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
C
OUT
Output Capacitor
Capacitance
ESR
2.2
5
22
500
μF
m
20020308
FIGURE 1. Line Transient Response Input Perturbation
L
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 |
|---|---|
| LP3982 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower, Ultra Low-Dropout, Low-Noise, 300mA CMOS Regulator |
| LP3982-15J5F | 制造商:POWER 制造商全稱:Lowpower Semiconductor inc 功能描述:300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator |
| LP3982-18J5F | 制造商:POWER 制造商全稱:Lowpower Semiconductor inc 功能描述:300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator |
| LP3982-25J5F | 制造商:POWER 制造商全稱:Lowpower Semiconductor inc 功能描述:300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator |
| LP3982-28J5F | 制造商:POWER 制造商全稱:Lowpower Semiconductor inc 功能描述:300mA,Ultra-low noise, Small Package Ultra-Fast CMOS LDO Regulator |
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