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參數(shù)資料
| 型號： | LP3984IBP-1.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | GT 3C 3#16S PIN RECP WALL RM |
| 中文描述： | 1.8 V FIXED POSITIVE LDO REGULATOR, 0.12 V DROPOUT, PBGA4 |
| 封裝： | 0.995 MM HEIGHT, MICRO, BUMP, SMD-4 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 293K |
| 代理商： | LP3984IBP-1.8 |
Electrical Characteristics
(Continued)
Unless otherwise specified: V
= 2.5V for 1.5, 1.8, & 2.0V options, V
= V
+ 0.5 for output options higher than 2.5V, C
IN
=
1 μF, I
OUT
= 1mA, C
OUT
= 1 μF, tantalum. Typical values and limits appearing in standard typeface are for T
J
= 25C. Limits
appearing in
boldface type
apply over the entire junction temperature range for operation, 40C to +125C. (Note 7) (Note 8)
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
0.4
V
IL
Maximum Low Level Input
Voltage at EN
Minimum High Level Input
Voltage at EN
Output Capacitor
V
IN
= 2.5 to 6.0V
V
V
IH
V
IN
= 2.5 to 6.0V
1.4
V
C
OUT
Capacitance
ESR
1
2
22
10
μF
C
C
TSD
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
160
20
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:
Additional information on lead temperature and pad temperature can be found in National Semiconductor Application Note (AN-1112).
Note 4:
The
Absolute
Maximum
power
dissipation
depends
on
the
P
D
= (T
J
- T
A
)/
θ
JA
,
where T
J
is the junction temperature, T
A
is the ambient temperature, and
θ
JA
is the junction-to-ambient thermal resistance. The 364mW rating for SOT23-5
appearing under Absolute Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150C, for T
J
, 70C for T
A
, 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 for SOT23-5 can be increased by 4.5mW for each degree below 70C, and it must be derated by 4.5mW for each degree above 70C.
Note 5:
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 6:
Like the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 250mW rating for
SOT23-5 appearing under Operating Ratings 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 4) 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.
Note 7:
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 8:
The target output voltage, which is labeled V
OUT(nom)
, is the desired voltage option.
Note 9:
An increase in the load current results in a slight decrease in the output voltage and vice versa.
Note 10:
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 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.
ambient
temperature
and
can
be
calculated
using
the
formula:
20020408
FIGURE 1. Output AC Line Regulation Input Perturbation
L
www.national.com
5
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