lp2985aim5-2.0 National Semiconductor Corporation, lp2985aim5-2.0 Datasheet - Page 5

• Manufacturer Part Number: lp2985aim5-2.0
• Description: Micropower 150 Ma Low-noise Low-dropout Regulator In Sot-23 And Micro Smd Packages For Applications
• Manufacturer: National Semiconductor Corporation

I
I
O
O
Electrical Characteristics
Limits in standard typeface are for T
less otherwise specified: V
(SC)
(PK)
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 5 and 2 for the micro SMD package, is 1 kV.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T
and the ambient temperature, T
Where the value of θ
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 LP2985LV output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V
turn on this diode, and possibly damage the device (See Application Hints).
Note 6: Limits are 100% production tested at 25˚C. 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: The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.
Note 8: The LP2985LV has foldback current limiting which allows a high peak current when V
is forced to ground (see Typical Performance Characteristics curves).
Note 9: V
at which the output voltage drops 2% below ther value measured with a 1V differential.
Note 10: Exposing the micro SMD device to direct sunlight will cause misoperation. See Application Hints for additional information.
Symbol
IN
must be the greater of 2.2V or V
Ripple Rejection
Short Circuit Current
Peak Output Current
J-A
for the SOT-23 package is 220˚C/W in a typical PC board mounting. Exceeding the maximum allowable dissipation will cause excessive die
Parameter
A
. The maximum allowable power dissipation at any ambient temperture is calculated using:
IN
= V
O
(NOM) + 1V, I
OUT(nom)
J
= 25˚C. and limits in boldface type apply over the full operating temperature range. Un-
f = 1 kHz, C
C
R
(Note 8)
V
OUT
OUT
L
+ Dropout Voltage to maintain output regulation. Dropout Voltage is defined as the input to output differential
(Note 10) (Continued)
= 0 (Steady State)
≥ V
= 10 µF
L
Conditions
o
= 1 mA, C
(NOM) −5%
IN
BYPASS
to V
OUT
= 10 nF
terminals that is normally reverse-biased. Reversing the polarity from V
IN
= 1 µF, C
5
Typ
400
350
OUT
45
OUT
= 4.7 µF, V
>
0.5V, and then reduces the maximum output current as V
LP2985AI-X.X
Min
J
(MAX), the junction-to-ambient thermal resistance, θ
(Note 6)
ON/OFF
Max
= 2V.
Min
LP2985I-X.X
(Note 6)
Max
www.national.com
IN
to V
OUT
Units
mA
mA
dB
OUT
J-A
will
,