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PDF LM2575 Data sheet ( Hoja de datos )
| Número de pieza | LM2575 | |
| Descripción | 1A & 3A Miniconverter Switching Regulators | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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 1. - 1A, Step-Down Switching Regulator  Hay una vista previa y un enlace de descarga de LM2575 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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POWER MANAGEMENT
Description
Features
LM2575 & LM2576
1A & 3A Miniconverter
Switching Regulators
The LM2575/6 series switching regulators are monolithic
integrated circuits designed for use in buck or buck/
boost regulator applications requiring accurate output
voltages over combined variations of line, load and
temperature. This unique series greatly simplifies
switching power supply design. The LM2575 has a
maximum output current of 1A and the LM2576 is rated
for 3A.
The LM2575/6 series miniconverters include a
switching regulator and compensation network all within
the same package. Just add a choke, catch diode and
two capacitors to obtain an efficient DC-to-DC converter.
The current limit and thermal shutdown features of the
LM2575/6 series fully protect the device against
overstress conditions.
The LM2575/6 series offers an alternative to popular 3
terminal linear regulators by providing higher efficiency
with reduced heatsink size. In many applications a heat
sink will not be required.
u Pin for pin replacement for Nationals LM2575/6
series
u DC-to-DC buck or buck/boost converter requiring
only 4 support components
u Fixed or adjustable voltages
u Preset output voltages of 3.3V, 5V and 12V
u Wide output voltage range, 1.23V to 35V
u 82% typical efficiency @ 5V out
u Wide input voltage range, 4V to 40V
u Inhibit/enable control pin
u Industrial temperature range
u TO-220 and TO-263 packages
Applications
u Micro controller power supplies
u Medical equipment
u Industrial power supplies
u Instrumentation power supplies
Typical Application Circuits
Revision 1, January 2001
LM2575 LM2576
L1
D1
CIN
COUT
330µH
3A
68µF
330µF
100µH
7A
120µF
1,000µF
1 www.semtech.com
1 page  
POWER MANAGEMENT
Pin Configurations
TO-220-5
Block Diagram
TO-263-5
LM2575, LM2576
Pin Function
1 VIN
2 OUTPUT
3 COMMON
4 FEEDBACK
5 ON/OFF
TAB is COMMON
LM2575 & LM2576
Ordering Information
Device(1)
Package
Current
LM2575T-XX
TO-220-5(2)(3)
1A
LM2575S-XX.TR
TO-263-5(4)
LM2576T-XX
TO-220-5(2)(3)
3A
LM2576S-XX.TR
TO-263-5(4)
Notes:
(1) -XX = Voltage Option. Available voltages are 3.3V
(-3.3), 5V (-5.0), 12V (-12), and ADJ (-ADJ), which is
adjustable between 1.23V and 35V.
(2) Lead bend options for TO-220-5 are: T-XX = Straight
in-line; T-XX-V = Vertical Staggered; T-XX-H = Horizontal
Staggered. Please refer to outline drawings at the end of
this datasheet.
(3) Only available in tube packaging. A tube contains 50
devices.
(4) Only available in tape and reel packaging. A reel
contains 800 devices.
ã 2001 Semtech Corp.
5
www.semtech.com
5 Page 
POWER MANAGEMENT
Typical Characteristics - LM2576 (Cont.)
LM2575 & LM2576
ã 2001 Semtech Corp.
11
www.semtech.com
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet LM2575.PDF ] | |
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