LM2576SX-5.0/NOPB National Semiconductor, LM2576SX-5.0/NOPB Datasheet - Page 10
![IC REG SW 5V 3A STP DN TO-263-5](/photos/7/0/70012/ts5b_sml.jpg)
LM2576SX-5.0/NOPB
Manufacturer Part Number
LM2576SX-5.0/NOPB
Description
IC REG SW 5V 3A STP DN TO-263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2576T-5.0NOPB.pdf
(24 pages)
Specifications of LM2576SX-5.0/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Package
6TO-263
Minimum Input Voltage
4 V
Maximum Input Voltage
40 V
Switching Frequency
58 KHz
Operating Supply Voltage
4 to 40 V
Maximum Output Current
3 A
Output Type
Fixed
Output Voltage
5 V
Efficiency
77(Typ) %
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2576SX-5.0
*LM2576SX-5.0/NOPB
LM2576SX-5.0
*LM2576SX-5.0/NOPB
LM2576SX-5.0
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2576SX-5.0/NOPB
Manufacturer:
NATIONAL
Quantity:
177
Part Number:
LM2576SX-5.0/NOPB
Manufacturer:
NS/国半
Quantity:
20 000
www.national.com
Test Circuit and Layout Guidelines
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance
generate voltage transients which can cause problems. For
minimal inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
C
C
D
L
R
R
where V
1
IN
OUT
1
1
2
— 100 µH, Pulse Eng. PE-92108
— Schottky, MBR360
— 2k, 0.1%
— 6.12k, 0.1%
— 100 µF, 75V, Aluminum Electrolytic
— 1000 µF, 25V, Aluminum Electrolytic
REF
= 1.23V, R1 between 1k and 5k.
Adjustable Output Voltage Version
Fixed Output Voltage Versions
FIGURE 2.
10
Single-point grounding (as indicated) or ground plane con-
struction should be used for best results. When using the
Adjustable version, physically locate the programming resis-
tors near the regulator, to keep the sensitive feedback wiring
short.
01147607
01147608