LM2596S-ADJ/NOPB National Semiconductor, LM2596S-ADJ/NOPB Datasheet - Page 9

IC REG SIMPLE SWITCHER TO-263-5

LM2596S-ADJ/NOPB

Manufacturer Part Number
LM2596S-ADJ/NOPB
Description
IC REG SIMPLE SWITCHER TO-263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r

Specifications of LM2596S-ADJ/NOPB

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.2 ~ 37 V
Current - Output
3A
Frequency - Switching
150kHz
Voltage - Input
4.5 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Current, Input Bias
10 nA
Current, Output
3 A
Current, Supply
5 mA
Frequency, Oscillator
150 kHz
Package Type
TO-263
Regulator Type
Buck, Switching
Resistance, Thermal, Junction To Case
2 °C/W
Temperature, Operating, Range
-40 to +125 °C
Voltage, Input
4.5 to 40 V
Voltage, Output
1.2 to 37 V
Primary Input Voltage
40V
No. Of Outputs
1
Output Voltage
37V
Output Current
3A
No. Of Pins
5
Operating Temperature Range
-40°C To +125°C
Msl
MSL 3 - 168 Hours
Filter Terminals
SMD
Rohs Compliant
Yes
For Use With
551011367-041 - BOARD WEBENCH BUILD IT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
RoHS Compliant part
Other names
*LM2596S-ADJ
*LM2596S-ADJ/NOPB
LM2596S-ADJ

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2596S-ADJ/NOPB
Manufacturer:
TI
Quantity:
25
Test Circuit and Layout Guidelines
where V
Select R
C
C
D1
L1
R1
C
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance can
generate voltage transients which can cause problems. For
minimal inductance and ground loops, the wires indicated by
heavy lines should be wide printed circuit traces and
should be kept as short as possible. For best results,
external components should be located as close to the
switcher lC as possible using ground plane construction or
single point grounding.
If open core inductors are used, special care must be
taken as to the location and positioning of this type of induc-
tor. Allowing the inductor flux to intersect sensitive feedback,
lC groundpath and C
IN
OUT
FF
— 68 µH, L38
— 5A, 40V Schottky Rectifier, 1N5825
— 1 k , 1%
— 470 µF, 50V, Aluminum Electrolytic Nichicon “PL Series”
— See Application Information Section
— 220 µF, 35V Aluminum Electrolytic, Nichicon “PL Series”
REF
1
to be approximately 1 k , use a 1% resistor for best stability.
= 1.23V
OUT
wiring can cause problems.
FIGURE 1. Standard Test Circuits and Layout Guides
Adjustable Output Voltage Versions
(Continued)
9
When using the adjustable version, special care must be
taken as to the location of the feedback resistors and the
associated wiring. Physically locate both resistors near the
IC, and route the wiring away from the inductor, especially an
open core type of inductor. (See application section for more
information.)
01258323
www.national.com

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