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參數(shù)資料
| 型號(hào)： | LP3988IMFX-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Micropower, 150mA Ultra Low-Dropout CMOS Voltage Regulator With Power Good |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.15 V DROPOUT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 292K |
| 代理商： | LP3988IMFX-3.3 |
Electrical Characteristics
(Continued)
Unless otherwise specified: V
= 1.8V, V
= V
+ 0.5V, C
= 1 μF, I
= 1mA, C
= 1 μF. Typical values and limits
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. (Note 6) (Note 7)
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
0.5
V
IL
V
IH
Power Good
Logic Low Input threshold
Logic High Input threshold
V
IN
= 2.5V to 6.0V
V
IN
= 2.5V to 6.0V
V
V
1.2
V
THL
V
THH
V
OL
I
PGL
Power Good
Low threshold
High Threshold
PG Output Logic Low Voltage
PG Output Leakage Current
Power Good Turn On time,
(Note 9)
Power Good Turn Off time,
(Note 9)
% of V
OUT
(PG ON)
Figure 2
% of V
OUT
(PG OFF)
Figure 2
(Note
14)
I
PULL-UP
= 100μA, fault condition
PG Off, V
PG
= 6V
V
IN
= 4.2V
93
95
0.02
0.02
10
90
92
95
98
0.1
%
V
μA
μs
T
ON
T
OFF
V
IN
= 4.2V
10
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 Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula:
P
D
= (T
J
- T
A
)/
θ
JA
where T
is the junction temperature, T
is the ambient temperature, and
θ
is the junction-to-ambient thermal resistance. The 364mW rating appearing under
Absolute Maximum Ratings for the SOT23-5 package results from substituting theAbsolute Maximum junction temperature, 150C, for T
, 70C for T
, and 220C/W
for
θ
JA
. More power can be dissipated safely at ambient temperatures below 70C . Less power can be dissipated safely at ambient temperatures above 70C. The
Absolute Maximum power dissipation can be increased by 4.5mW for each degree below 70C, and it must be derated by 4.5mW for each degree above 70C. Same
principle applies to the micro SMD package.
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:
Like the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 250mW rating
appearing under Operating Ratings for the SOT23-5 package results from substituting the maximum junction temperature for operation, 125C, for T
J
, 70C for T
A
,
and 220C/W for
θ
JA
into (Note 3) above. More power can be dissipated at ambient temperatures below 70C . Less power can be dissipated at ambient
temperatures above 70C. The maximum power dissipation for operation can be increased by 4.5mW for each degree below 70C, and it must be derated by 4.5mW
for each degree above 70C. Same principle applies to the micro SMD package.
Note 6:
All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with T
J
= 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.
Note 10:
Short circuit current is measured on input supply line after pulling down V
OUT
to 95% V
OUT(nom)
.
Note 11:
Guaranteed by design. The capacitor tolerance should be
±
30% or better over the full temperature range. The full range of operating conditions such as
temperature, DC bias and even capacitor case size for the capacitor in the application should be considered during device selection to ensure this minimum
capacitance specification is met. X7R capacitor types are recommended to meet the full device temperature range.
Note 12:
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 13:
100V machine model for Power-good flag, pin 4.
Note 14:
The low and high thresholds are generated together. Typically a 2.6% difference is seen between these thresholds.
Note 15:
The minimum V
IN
is dependant on the device output option.
For Vout
(NOM)
<
2.5V, V
IN(MIN)
will equal 2.5V. For Vout
(NOM)
>
= 2.5V, V
IN(MIN)
will equal Vout
(NOM)
+ 200mV.
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3988ITL-1.85 | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 1.85V 0.15A 5-Pin uSMD T/R |
| LP3988ITL-1.85/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(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 |
| LP3988ITL-2.6 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC V REG LDO 0.15A 2.6V SMD 3988 |
| LP3988ITL-2.6/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(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 |
| LP3988ITL-2.85 | 制造商:Texas Instruments 功能描述:V REG LDO 0.15A 2.85V SMD 3988 |
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