Datasheet
LM2595
www.ti.com
SNVS122B –MAY 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
= 200 mA.
Symbol Parameter Conditions LM2595-XX Units
(Limits)
Typ Limit
(1) (2)
I
CL
Current Limit Peak Current
(4) (5)
1.5 A
1.2/1.15 A(min)
2.4/2.6 A(max)
I
L
Output Leakage Current Output = 0V
(4) (6)
and
(7)
50 μA(max)
Output = −1V 2 mA
15 mA(max)
I
Q
Quiescent Current See
(6)
5 mA
10 mA(max)
I
STBY
Standby Quiescent ON/OFF pin = 5V (OFF)
(7)
85 μA
Current 200/250 μA(max)
θ
JC
Thermal Resistance TO-220 or TO-263 Package, Junction to Case 2 °C/W
θ
JA
TO-220 Package, Junction to Ambient
(8)
50 °C/W
θ
JA
TO-263 Package, Junction to Ambient
(9)
50 °C/W
θ
JA
TO-263 Package, Junction to Ambient
(10)
30 °C/W
θ
JA
TO-263 Package, Junction to Ambient
(11)
20 °C/W
ON/OFF CONTROL Test Circuit Figure 21
ON /OFF Pin Logic Input 1.3 V
V
IH
Threshold Voltage Low (Regulator ON) 0.6 V(max)
V
IL
High (Regulator OFF) 2.0 V(min)
I
H
ON/OFF Pin V
LOGIC
= 2.5V (Regulator OFF) 5 μA
Input Current
15 μA(max)
I
L
V
LOGIC
= 0.5V (Regulator ON) 0.02 μA
5 μA(max)
(7) V
IN
= 40V.
(8) 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 LM2595S side of the board, and approximately 16 in
2
of copper on the other side of the p-c board. See Application
Information in this data sheet and the thermal model in Switchers Made Simple
®
version 4.3 software.
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