LM4040
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SLOS456K – JANUARY 2005 – REVISED MARCH 2008
FUNCTIONAL BLOCK DIAGRAM
CATHODE
+
_
ANODE
Absolute Maximum Ratings
(1)
over free-air temperature range (unless otherwise noted)
MIN
I
Z
θ
JA
T
J
T
stg
(1)
(2)
(3)
Continuous cathode current
DBZ package
Package thermal impedance
(2) (3)
MAX
25
206
252
156
150
UNIT
mA
°C/W
°C
°C
–10
DCK package
LP package
Operating virtual junction temperature
Storage temperature range
–65
150
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.
Maximum power dissipation is a function of T
J
(max),
θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J
(max) – T
A
)/θ
JA
. Operating at the absolute maximum T
J
of 150°C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
MIN
I
Z
T
A
(1)
Cathode current
Free-air temperature
See parametric tables
LM4040xxxI
LM4040xxxQ
(1)
MAX
15
85
125
UNIT
mA
°C
–40
–40
Copyright © 2005–2008, Texas Instruments Incorporated
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