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參數資料
| 型號： | LP2992ILDX-2.5 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output Capacitors |
| 中文描述： | 2.5 V FIXED POSITIVE LDO REGULATOR, 0.85 V DROPOUT, PDSO6 |
| 封裝： | LLP-6 |
| 文件頁數： | 5/15頁 |
| 文件大?。?/td> | 598K |
| 代理商： | LP2992ILDX-2.5 |
Electrical Characteristics
(Continued)
Limits in standard typeface are for T
= 25C. and limits in
boldface type
apply over the full operating temperature range. Un-
less otherwise specified: V
IN
= V
O
(NOM) + 1V, I
L
= 1 mA, C
IN
= 1 μF, C
OUT
= 4.7 μF, V
ON/OFF
= 2V.
Symbol
Parameter
Conditions
Typ
LP2992AI-X.X
(Note 6)
Min
LP2992I-X.X
(Note 6)
Min
Units
Max
2
15
Max
2
15
I
ON/OFF
ON/OFF Input Current
V
ON/OFF
= 0
V
ON/OFF
= 5V
BW = 300 Hz to 50 kHz,
C
OUT
= 10 μF
C
BYPASS
= 10 nF
f = 1 kHz, C
BYPASS
= 10 nF
0.01
5
μA
e
n
Output Noise
Voltage (RMS)
30
μV
Ripple Rejection
45
dB
C
OUT
= 10 μF
I
O
(SC)
Short Circuit Current
R
L
= 0 (Steady State)
(Note 9)
V
OUT
≥
V
o
(NOM) 5%
400
mA
I
O
(PK)
Peak Output Current
350
mA
Note 1:
“Absolute Maximum Ratings” indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device outside of its rated operating conditions.
Note 2:
The ESD rating of pins 3 and 4 for the SOT-23 package, or pins 1 and 3 for the LLP package, is 1 kV.
Note 3:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal resistance,
θ
J-A
,
and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperture is calculated using:
Where the value of
θ
J-A
for the SOT-23 package is 220C/W in a typical PC board mounting and the LLP package is 65C/W. Exceeding the maximum allowable
dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
Note 4:
If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2992 output must be diode-clamped to ground.
Note 5:
The output PNP structure contains a diode between the V
IN
to V
OUT
terminals that is normally reverse-biased. Reversing the polarity from V
IN
to V
OUT
will
turn on this diode.
Note 6:
Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 7:
V
IN
must be the greater of 2.2V or V
OUT(nom)
+ Dropout Voltage to maintain output regulation. Dropout voltage is defined as the input to output differential
at which the output voltage drops 2% below the value measured with a 1V differential.
Note 8:
The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.
Note 9:
The LP2992 has foldback current limiting which allows a high peak current when V
OUT
>
0.5V, and then reduces the maximum output current as V
OUT
is
forced to ground (see Typical Performance Characteristics curves).
L
www.national.com
5
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LP2992ILDX-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 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2992ILDX-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 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2992ILDX-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 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2992ILDX-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 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2992IM5-1.5 | 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 負載調節(jié):0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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