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LM2575-12IKTT PDF预览

LM2575-12IKTT

更新时间： 2024-09-15 22:11:55
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关
页数 文件大小 规格书
12页 192K
描述
1-A SIMPLE STEP DOWN SWITCHING VOLTAGE REGULATOR

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LM2575-12IKTT 数据手册

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LM2575  
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR  
www.ti.com  
SLVS569D–JANUARY 2005–REVISED JULY 2005  
FEATURES  
KTT (TO-263) PACKAGE  
•
Fixed 3.3-V, 5-V, 12-V, and 15-V Options With  
(TOP VIEW)  
±5% Regulation (Max) Over Line, Load, and  
Temperature Conditions  
5
4
3
ON/OFF  
FEEDBACK  
GND  
•
Adjustable Option With a Range of 1.23 V to  
37 V and ±4% Regulation (Max) Over Line,  
Load, and Temperature Conditions  
2
1
OUTPUT  
V
IN  
•
•
•
Specified 1-A Output Current  
Wide Input Voltage Range…4.75 V to 40 V  
N (PDIP) PACKAGE  
(TOP VIEW)  
Requires Only Four External Components  
(Fixed Versions) and Uses Readily Available  
Standard Inductors  
NC  
NC  
V
IN  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
NC  
•
•
52-kHz (Typ) Fixed-Frequency Internal  
Oscillator  
OUTPUT  
NC  
GND  
GND  
GND  
GND  
NC  
TTL Shutdown Capability With 50-µA (Typ)  
Standby Current  
GND  
NC  
•
•
High Efficiency…as High as 88% (Typ)  
FB  
Thermal Shutdown and Current-Limit  
Protection With Cycle-by-Cycle Current  
Limiting  
NC  
ON/OFF  
APPLICATIONS  
•
Simple High-Efficiency Step-Down (Buck)  
Regulator  
•
•
•
Pre-Regulator for Linear Regulators  
On-Card Switching Regulators  
Positive-to-Negative Converter (Buck-Boost)  
DESCRIPTION/ORDERING INFORMATION  
The LM2575 greatly simplifies the design of switching power supplies by conveniently providing all the active  
functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide input  
voltage range and available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, or an adjustable output version,  
the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load  
regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle  
current limiting, and thermal shutdown. In addition, a manual shutdown is available via an external ON/OFF pin.  
The LM2575 represents a superior alternative to popular three-terminal linear regulators. Due to its high  
efficiency, it significantly reduces the size of the heat sink and, in many cases, no heat sink is required.  
Optimized for use with standard series of inductors available from several different manufacturers, the LM2575  
greatly simplifies the design of switch-mode power supplies by requiring a minimal addition of only four to six  
external components for operation.  
The LM2575 is characterized for operation over the virtual junction temperature range of –40°C to 125°C.  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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