SNVS124C – NOVEMBER 1999 – REVISED APRIL 2013
All Output Voltage Versions Electrical Characteristics (continued)
Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over
full Operating
Temperature Range.
Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable version and V
IN
= 24V for the
12V version. I
LOAD
= 500 mA
LM2596-XX
Symbol
I
STBY
θ
JC
θ
JA
θ
JA
θ
JA
θ
JA
ON/OFF CONTROL
Test Circuit
ON /OFF Pin Logic Input
V
IH
V
IL
I
H
I
L
ON /OFF Pin Input Current
Threshold Voltage
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
= 2.5V (Regulator OFF)
V
LOGIC
= 0.5V (Regulator ON)
5
15
0.02
5
(8)
1.3
0.6
2.0
V
V(max)
V(min)
μA
μA(max)
μA
μA(max)
Parameter
Standby Quiescent Current
Thermal Resistance
Conditions
ON/OFF pin = 5V (OFF)
(7)
Typ
(1)
Limit
(2)
Units
(Limits)
μA
80
200/250
2
50
50
30
20
μA(max)
°C/W
°C/W
°C/W
°C/W
°C/W
TO-220 or TO-263 Package, Junction to Case
TO-220 Package, Junction to Ambient
TO-263 Package, Junction to Ambient
TO-263 Package, Junction to Ambient
TO-263 Package, Junction to Ambient
(8)
(9)
(10)
(11)
Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with the leads soldered to a
printed circuit board with (1 oz.) copper area of approximately 1 in
2
.
(9) Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board with 0.5 in
2
of (1 oz.)
copper area.
(10) Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in
2
of (1
oz.) copper area.
(11) Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in
2
of (1 oz.)
copper area on the LM2596S side of the board, and approximately 16 in
2
of copper on the other side of the p-c board. See
in this data sheet and the thermal model in Switchers Made Simple™ version 4.3 software.
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