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LP3987 数据表(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LP3987
功能描述  Micropower micro SMD 150 mA Ultra Low-Dropout CMOS Voltage Regulators with sleep MODE
PDF  17 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3987 数据表(HTML) 5 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
Unless otherwise specified: V
EN = 1.8V, MODE = 1.8V, VIN =VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF. Typical
values and limits appearing in standard typeface are for T
J = 25˚C. Limits appearing in boldface type apply over the entire
junction temperature range for operation, −40˚C to +125˚C. (Note 10) (Note 11)
Symbol
Parameter
Conditions
Typ
Limit
Units
Min
Max
I
SC(SLEEP)
Short Circuit Current in
Sleep MODE
Output Grounded
28
43
mA
I
OUT(ON)
Maximum Output
Current at MODE =
1.8V
MODE = 1.8V
150
mA
I
OUT(SLEEP)
Maximum Output
Current at MODE = 0V
MODE = 0V
3
mA
e
n
Output Noise Voltage,
(Note 5)
BW = 10 Hz to 100 kHz,
C
OUT = 1µF
70
µVrms
T
SHUTDOWN
Shutdown Temperature
(Note 5)
Sleep MODE = 1.8V
155
˚C
Logic Control Characteristics
I
EN
Maximum Input Current
at EN
V
EN = 0 and VIN= 6.0V
0.015
µA
V
IL
Logic Low Input
Threshold
V
IN = 3.05 to 6V
0.5
V
V
IH
Logic High Input
Threshold
V
IN = 3.05 to 6V
1.2
V
V
MODE_L
Logic Low Input
Threshold
V
IN = 3.05 to 6V
0.5
V
V
MODE_H
Logic High Input
Threshold
V
IN = 3.05 to 6V
1.2
V
I
MODE
Maximum Input Current
at V
MODE
V
MODE = 0 and VIN = 6.0V
0.015
µA
Timing Characteristics
T
ON
Turn on Time (On
Mode), (Notes 5, 13)
MODE = 1.8V, C
OUT = 4.7µF
170
250
µs
T
SLEEP
Turn on Time (Sleep
Mode), (Note 5), (Note
14)
MODE = 0V, C
OUT = 4.7µF
0.5
5
ms
T
MODE
Sleep to On Mode
Settle Time, (Note 5),
(Note 15)
C
OUT = 4.7µF, Enable = 1.8V
200
300
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 =(TJ -TA)/
θ
JA,
Where TJ is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. For instant, if VIN in target application
is 4.2V and worse case current consumption is 90mA. Therefore PMAX_DISSIPATION = (4.2-2.7)*0.09 =135mW. With PMAX_DISSIPATION is 135mW, TJmax is 125˚C
and worse case ambient temperature (TA ) in target application is 85˚C,
θJA = (125-85)/0.135 = 296˚C/W.
Note 4: The human body model is 100pF discharged through 1.5k
Ω.
Note 5: This electrical specification is guaranteed by design.
www.national.com
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