LM2596
LM2596-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over
full Operating Tempera-
ture Range
LM2596-ADJ
Symbol
Parameter
Conditions
Typ
1.230
1.193/1.180
1.267/1.280
η
Efficiency
V
IN
= 12V, V
OUT
= 3V, I
LOAD
= 3A
73
Limit
Units
(Limits)
SYSTEM PARAMETERS
V
FB
Feedback Voltage
4.5V
≤
V
IN
≤
40V, 0.2A
≤
I
LOAD
≤
3A
V
OUT
programmed for 3V. Circuit of
V
V(min)
V(max)
%
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over
full Operating Tempera-
ture Range.
Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable version and V
IN
= 24V for the 12V ver-
sion. I
LOAD
= 500 mA
LM2596-XX
Symbol
Parameter
Conditions
Typ
10
50/100
f
O
Oscillator Frequency
150
127/110
173/173
V
SAT
DC
I
CL
Saturation Voltage
Max Duty Cycle (ON)
Min Duty Cycle (OFF)
Current Limit
I
OUT
= 3A (Notes 7, 8)
Peak Current (Notes 7, 8)
1.16
1.4/1.5
100
0
4.5
3.6/3.4
6.9/7.5
I
L
Output Leakage Current
Output = 0V (Notes 7, 9)
Output = −1V (Note 10)
I
Q
I
STBY
θ
JC
θ
JA
θ
JA
θ
JA
θ
JA
ON /OFF Pin Logic Input
V
IH
V
IL
Threshold Voltage
Low (Regulator ON)
High (Regulator OFF)
Quiescent Current
Standby Quiescent Current
Thermal Resistance
ON/OFF pin = 5V (OFF)
2
30
5
10
80
200/250
TO-220 or TO-263 Package, Junction to Case
TO-220 Package, Junction to Ambient (Note 11)
TO-263 Package, Junction to Ambient (Note 12)
TO-263 Package, Junction to Ambient (Note 13)
TO-263 Package, Junction to Ambient (Note 14)
2
50
50
30
20
1.3
0.6
2.0
50
A
A(min)
A(max)
µA(max)
mA
mA(max)
mA
mA(max)
µA
µA(max)
˚C/W
˚C/W
˚C/W
˚C/W
˚C/W
V
V(max)
V(min)
Limit
Units
(Limits)
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only, V
FB
= 1.3V
nA
nA (max)
kHz
kHz(min)
kHz(max)
V
V(max)
%
ON/OFF CONTROL
Test Circuit
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