IC, STEP-DOWN VOLTAGE REGULATOR, TO-220

LM2596T-ADJ

Manufacturer Part NumberLM2596T-ADJ
DescriptionIC, STEP-DOWN VOLTAGE REGULATOR, TO-220
ManufacturerNational Semiconductor
LM2596T-ADJ datasheet
 


Specifications of LM2596T-ADJ

Primary Input Voltage40VNo. Of Outputs1
Output Voltage37VOutput Current3A
No. Of Pins5Operating Temperature Range-40°C To +125°C
Supply Voltage Range4.5V To 40VFilter TerminalsThrough Hole
Rohs CompliantYesLead Free Status / RoHS StatusLead free / RoHS Compliant
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Page 5/31

Download datasheet (737Kb)Embed
PrevNext
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
ture Range. Unless otherwise specified, V
sion. I
= 500 mA
LOAD
Symbol
Parameter
I
ON /OFF Pin Input Current
H
I
L
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 3: Typical numbers are at 25˚C and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to
calculate Average Outgoing Quality Level (AOQL).
Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator
system performance. When the LM2596 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical
Characteristics.
Note 6: The switching frequency is reduced when the second stage current limit is activated.
Note 7: No diode, inductor or capacitor connected to output pin.
Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor
switch OFF.
Note 10: V
= 40V.
IN
Note 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
2
with (1 oz.) copper area of approximately 1 in
Note 12: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board with 0.5 in
Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in
Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in
the LM2596S side of the board, and approximately 16 in
model in Switchers Made Simple
version 4.3 software.
Typical Performance Characteristics
Normalized
Output Voltage
01258304
(Continued)
= 25˚C, and those with boldface type apply over full Operating Tempera-
J
= 12V for the 3.3V, 5V, and Adjustable version and V
IN
Conditions
V
= 2.5V (Regulator OFF)
LOGIC
V
= 0.5V (Regulator ON)
LOGIC
.
2
of copper on the other side of the p-c board. See Application Information in this data sheet and the thermal
(Circuit of Figure 1 )
Line Regulation
01258305
5
= 24V for the 12V ver-
IN
LM2596-XX
Units
Typ
Limit
(Limits)
(Note 3)
(Note 4)
5
µA
15
µA(max)
0.02
µA
5
µA(max)
2
of (1 oz.) copper area.
2
of (1 oz.) copper area.
2
of (1 oz.) copper area on
Efficiency
01258306
www.national.com