LM2596-ADJ
Electrical Characteristics
Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range
LM2596-ADJ
Units
Symbol
Parameter
Conditions
Typ
Limit
(Limits)
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1
VFB
Feedback Voltage 4.5V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A
1.230
73
V
VOUT programmed for 3V. Circuit of Figure 1
1.193/1.180
1.267/1.280
V(min)
V(max)
%
η
Efficiency
VIN = 12V, VOUT = 3V, ILOAD = 3A
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V ver-
sion. ILOAD = 500 mA
LM2596-XX
Units
Symbol
Parameter
Conditions
Typ
Limit
(Limits)
(Note 3)
(Note 4)
DEVICE PARAMETERS
Ib
Feedback Bias Current
Adjustable Version Only, VFB = 1.3V
(Note 6)
10
nA
nA (max)
kHz
50/100
fO
Oscillator Frequency
Saturation Voltage
150
127/110
173/173
kHz(min)
kHz(max)
V
VSAT
DC
IOUT = 3A (Notes 7, 8)
1.16
1.4/1.5
V(max)
%
Max Duty Cycle (ON)
Min Duty Cycle (OFF)
Current Limit
(Note 8)
100
0
(Note 9)
ICL
Peak Current (Notes 7, 8)
4.5
A
3.6/3.4
6.9/7.5
50
A(min)
A(max)
µA(max)
mA
IL
Output Leakage Current
Quiescent Current
Output = 0V (Notes 7, 9)
Output = −1V (Note 10)
2
5
30
10
mA(max)
mA
IQ
(Note 9)
mA(max)
µA
ISTBY
Standby Quiescent Current ON/OFF pin = 5V (OFF)
(Note 10)
80
200/250
µA(max)
˚C/W
θJC
θJA
θJA
θJA
θJA
Thermal Resistance
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
˚C/W
˚C/W
˚C/W
˚C/W
ON/OFF CONTROL Test Circuit Figure 1
ON /OFF Pin Logic Input
1.3
V
VIH
VIL
Threshold Voltage
Low (Regulator ON)
High (Regulator OFF)
0.6
2.0
V(max)
V(min)
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