Datasheet
LP3985
www.ti.com
SNVS087AC –OCTOBER 2000–REVISED MAY 2013
Absolute Maximum Ratings
(1)(2)(3)
V
IN
, V
EN
−0.3 to 6.5V
V
OUT
−0.3 to (V
IN
+0.3) ≤ 6.5V
Junction Temperature 150°C
Storage Temperature −65°C to +150°C
Lead Temp. 235°C
Pad Temp.
(4)
235°C
Maximum Power Dissipation
SOT23-5
(5)
364mW
DSBGA
(5)
314mW
ESD Rating
(6)
Human Body Model 2kV
Machine Model 150V
(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 verified. Operating Ratings do not imply verified performance limits. For verified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(2) All voltages are with respect to the potential at the GND pin.
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(4) Additional information on lead temperature and pad temperature can be found in Texas Instruments Application Note AN-
1112(SNOA401).
(5) 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
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, 150°C, for T
J
, 70°C for T
A
, and 220°C/W for θ
JA
. More power can be dissipated safely at ambient temperatures below
70°C . Less power can be dissipated safely at ambient temperatures above 70°C. The Absolute Maximum power dissipation can be
increased by 4.5mW for each degree below 70°C, and it must be derated by 4.5mW for each degree above 70°C.
(6) The human body model is 100pF discharged through 1.5kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Operating Ratings
(1)(2)
V
IN
2.5 to 6V
V
EN
0 to (V
IN
+0.3) ≤ 6V
Junction Temperature −40°C to +125°C
Thermal Resistance
θ
JA
(SOT23-5) 220°C/W
θ
JA
(DSBGA) 255°C/W
Maximum Power Dissipation
SOT23-5
(3)
250mW
DSBGA
(3)
216mW
(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 verified. Operating Ratings do not imply verified performance limits. For verified performance limits and
associated test conditions, see the Electrical Characteristics tables.
(2) All voltages are with respect to the potential at the GND pin.
(3) 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, 125°C, for T
J
, 70°C for T
A
, and 220°C/W for θ
JA
into P
D
= (T
J
- T
A
)/θ
JA
from above. More power can be dissipated at ambient
temperatures below 70°C . Less power can be dissipated at ambient temperatures above 70°C. The maximum power dissipation for
operation can be increased by 4.5mW for each degree below 70°C, and it must be derated by 4.5mW for each degree above 70°C.
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