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PDF LM2575 Data sheet ( Hoja de datos )
| Número de pieza | LM2575 | |
| Descripción | Step-Down Switching Regulator | |
| Fabricantes | HTC | |
| 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 13 Páginas | ||
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1A, 52kHz, Step-Down Switching Regulator
LM2575
FEATURES
3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions
Adjustable Version Output Voltage Range, 1.23 to 37V
+/- 4% AG10 Maximum Over Line and Load Conditions
Guaranteed 1A Output Current
Wide Input Voltage Range
Requires Only 4 External Components
52kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection
Moisture Sensitivity Level 3
Applications
Simple High-Efficiency Step-Down(Buck) Regulator
Efficient Pre-Regulator for Linear Regulators
On-Card Switching Regulators
Positive to Negative Converter(Buck-Boost)
Negative Step-Up Converters
Power Supply for Battery Chargers
TO-220 PKG
15
TO-220V PKG
1
5
TO-263 PKG
1
5
1. Vin 2. Output 3. Ground
4. Feedback 5. On/Off
DESCRIPTION
ORDERING INFORMATION
The LM2575 series of regulators are monolithic integrated
Device
Marking
circuits ideally suited for easy and convenient design of a
LM2575T-X.X LM2575T-X.X
step-down switching regualtor(buck converter).
LM2575TV-X.X LM2575T-X.X
All circuits of this series are capable of driving a 1A load
LM2575R
LM2575R-X.X
with excellent line and load regulation. These devices are
available in fixed output voltages of 3.3V, 5.0V,12V, 15V,
and an adjustable output version.
These regulatiors were designed to minimize the number of externalcomponents to simplify the
power supply design. Standard series of inductors optimized for use with the LM2575 are offered
by several different inductor manufacturers.
Since the LM2575 converter is a switch-mode power supply, its efficiency is significantly higher in
comparison with popular three-terminal limear reguators, especially with higher input voltages.
In many cases, the power dissipated is so low that no heatsink is required or its size could
be reduced dramatically. A standard series of inductors optimized for use with the LM2575 are
available from several different manufacturers. This feature greatly simplifies the design of
switch-mode power supplies. The LM2575 features include a guaranteed +/- 4% tolerance
on output voltage within specified input voltages and output load conditions, and +/-10% on the
oscillator frequency (+/- 2% over 0℃ to 125 ℃).
External shutdown is included, featuring 80 ㎂(typical) standby current. The output switch includes
cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.
Package
TO-220
TO-220V
TO-263
2008 - Ver. 1.0
−1−
HTC
1 page  
1A, 52kHz, Step-Down Switching Regulator
TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 15)
LM2575
−5−
HTC
5 Page 
1A, 52kHz, Step-Down Switching Regulator
LM2575-ADJ
LM2575
− 11 −
HTC
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LM2575.PDF ] | |
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