LM2575SX-5.0/NOPB National Semiconductor, LM2575SX-5.0/NOPB Datasheet - Page 12
![IC REG SW 5V 1A STP DN TO-263-5](/photos/7/0/70012/ts5b_sml.jpg)
LM2575SX-5.0/NOPB
Manufacturer Part Number
LM2575SX-5.0/NOPB
Description
IC REG SW 5V 1A STP DN TO-263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2575S-5.0NOPB.pdf
(28 pages)
Specifications of LM2575SX-5.0/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
1A
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)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2575SX-5.0
*LM2575SX-5.0/NOPB
LM2575SX-5.0
*LM2575SX-5.0/NOPB
LM2575SX-5.0
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2575SX-5.0/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
www.national.com
Test Circuit and Layout Guidelines
As in any switching regulator, layout is very important. Rapidly
switching currents associated with wiring inductance gener-
ate voltage transients which can cause problems. For minimal
inductance and ground loops, the length of the leads indicated
C
C
D1 — Schottky, 11DQ06
L1 — 330 μH, PE-52627 (for 5V in, 3.3V out, use 100 μH, PE-92108)
where V
R1 — 2k, 0.1%
R2 — 6.12k, 0.1%
Note: Pin numbers are for the TO-220 package.
IN
OUT
— 100 μF, 75V, Aluminum Electrolytic
— 330 μF, 25V, Aluminum Electrolytic
REF
= 1.23V, R1 between 1k and 5k.
Adjustable Output Voltage Version
Fixed Output Voltage Versions
FIGURE 2.
12
by heavy lines should be kept as short as possible. Single-
point grounding (as indicated) or ground plane construction
should be used for best results. When using the Adjustable
version, physically locate the programming resistors near the
regulator, to keep the sensitive feedback wiring short.
1147508
1147509