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PE-52627

更新时间： 2024-11-18 12:12:47
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
44页 6007K
描述
LM1575/LM2575/LM2575HV SIMPLE SWITCHER® 1A Step-Down Voltage Regulator

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LM1575, LM2575-N, LM2575HV  
www.ti.com  
SNVS106E –MAY 1999–REVISED APRIL 2013  
®
LM1575/LM2575/LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator  
Check for Samples: LM1575, LM2575-N, LM2575HV  
1
FEATURES  
DESCRIPTION  
The LM2575 series of regulators are monolithic  
integrated circuits that provide all the active functions  
for a step-down (buck) switching regulator, capable of  
driving a 1A load with excellent line and load  
regulation. These devices are available in fixed output  
voltages of 3.3V, 5V, 12V, 15V, and an adjustable  
output version.  
23  
•
3.3V, 5V, 12V, 15V, and Adjustable Output  
Versions  
•
Adjustable Version Output Voltage Range,  
–
1.23V to 37V (57V for HV Version) ±4%  
Max Over  
–
Line and Load Conditions  
Requiring  
a
minimum number of external  
•
•
Specified 1A Output Current  
components, these regulators are simple to use and  
include internal frequency compensation and a fixed-  
frequency oscillator.  
Wide Input Voltage Range, 40V up to 60V for  
HV Version  
•
•
•
Requires Only 4 External Components  
The LM2575 series offers  
a
high-efficiency  
52 kHz Fixed Frequency Internal Oscillator  
replacement for popular three-terminal linear  
regulators. It substantially reduces the size of the  
heat sink, and in many cases no heat sink is  
required.  
TTL Shutdown Capability, Low Power Standby  
Mode  
•
•
•
High Efficiency  
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.  
Uses Readily Available Standard Inductors  
Thermal Shutdown and Current Limit  
Protection  
P+ Product Enhancement Tested  
•
Other features include a specified ±4% tolerance on  
output voltage within specified input voltages and  
output load conditions, and ±10% on the oscillator  
frequency. External shutdown is included, featuring  
50 μA (typical) standby current. The output switch  
includes cycle-by-cycle current limiting, as well as  
thermal shutdown for full protection under fault  
conditions.  
APPLICATIONS  
•
Simple High-Efficiency Step-Down (Buck)  
Regulator  
•
•
•
Efficient Pre-Regulator for Linear Regulators  
On-Card Switching Regulators  
Positive to Negative Converter (Buck-Boost)  
Typical Application  
(Fixed Output Voltage Versions)  
Pin numbers are for the TO-220 package.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
SIMPLE SWITCHER is a registered trademark of Texas Instruments.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  
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