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