Data Sheet

LP2985-N
www.ti.com SNVS018V –MARCH 2000–REVISED JUNE 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS
(1)(2)
Storage Temperature Range −65°C to +150°C
Operating Junction Temperature Range −40°C to +125°C
Lead Temp. (Soldering, 5 sec.) 260°C
ESD Rating
(3)
2 kV
Power Dissipation
(4)
Internally Limited
Input Supply Voltage (Survival) −0.3V to +16V
Input Supply Voltage (Operating) 2.5V to +16V
Shutdown Input Voltage (Survival) −0.3V to +16V
Output Voltage (Survival, See
(5)
) −0.3V to +9V
I
OUT
(Survival) Short Circuit Protected
Input-Output Voltage (Survival, See
(6)
) −0.3V to +16V
(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.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The ESD rating of pins 3 and 4 for the SOT-23 package, or pins 5 and 2 for the DSBGA package, is 1 kV.
(4) 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 temperature is calculated
using:
where
(a) the value of θ
J-A
for the SOT-23 package is 220°C/W in a typical PC board mounting and the DSBGA package
is 225°C/W.
Exceeding the maximum allowable dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
(5) For 12V option, output voltage survival: -0.3 to +16V. If used in a dual-supply system where the regulator load is returned to a negative
supply, the LP2985-N output must be diode-clamped to ground.
(6) 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.
ELECTRICAL CHARACTERISTICS
(1)
Limits in standard typeface are for T
J
= 25°C. and limits in boldface type apply over the full operating temperature range.
Unless 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.
LP2985AI-X.X
(2)
LP2985I-X.X
(2)
Symbol Parameter Conditions Typ Units
Min Max Min Max
ΔV
O
Output Voltage I
L
= 1 mA −1.0 1.0 −1.5 1.5
Tolerance
1 mA ≤ I
L
≤ 50 mA −1.5 1.5 −2.5 2.5
−2.5 2.5 −3.5 3.5 %V
NOM
1 mA ≤ I
L
≤ 150 mA −2.5 2.5 −3.0 3.0
−3.5 3.5 −4.0 4.0
Output Voltage V
O
(NOM)+1V ≤ V
IN
≤ 16V 0.007 0.014 0.014
%/V
Line Regulation 0.032 0.032
(1) Exposing the DSBGA device to direct sunlight will cause misoperation. See APPLICATION HINTS for additional information.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical
Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
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