Datasheet

equations: where T
J(MAX)
is the maximum junction temperature, T
A
is the ambient temperature, and θ
JA
is the
LP3981
SNVS159G OCTOBER 2001REVISED MAY 2013
www.ti.com
Absolute Maximum Ratings
(1)(2)(3)
V
IN
, V
EN
0.3 to 6.5V
V
OUT
, V
OUT-SENSE
0.3 to V
IN
+ 0.3, Max 6.5V
Junction Temperature 150°C
Storage Temperature 65°C to +150°C
Lead Temp.
Pad Temp.
Power Dissipation
(4)
θ
JA
(VSSOP-8) 210°C/W
θ
JA
(WSON-6) 50°C/W
Maximum Power Dissipation at 25°C
VSSOP-8 595mW
WSON-6 2.5W
ESD Rating
(5)
Human Body Model 2kV
Machine Model 200V
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to the potential at the GND pin.
(3) If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
(4) The figures given for Absolute Maximum Power dissipation for the device are calculated using the following
junction-to-ambient thermal resistance. E.g. for the WSON package θ
JA
=50°C/W, T
J(MAX)
=150°C and using T
A
=25°C the maximum
power dissipation is found to be 2.5W. The derating factor (1/θ
JA
) = 20mW/°C, thus below 25°C the power dissipation figure can be
increased by 20 mW per degree, and similarity decreased by this factor for temperatures above 25°C
(5) 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
2.7 to 6V
V
EN
0 to V
IN
Junction Temperature 40°C to +125°C
Maximum Power Dissipation
(3)
VSSOP-8 476mW
WSON-6 2.0W
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to the potential at the GND pin.
(3) As for the Maximum Power dissipation, the maximum power in operation is dependant on the ambient temperature. This can be
calculated in the same way using T
J
=125°C, giving 2W as the maximum power dissipation for the WSON package in operation. The
same derating factor applies.
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