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LM2575T-ADJEP PDF预览

LM2575T-ADJEP

更新时间: 2024-11-15 13:09:19
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德州仪器 - TI 稳压器开关
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10页 171K
描述
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LM2575T-ADJEP 数据手册

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LM2575  
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR  
www.ti.com  
SLVS569EJANUARY 2005REVISED JANUARY 2006  
FEATURES  
APPLICATIONS  
Simple High-Efficiency Step-Down (Buck)  
Regulator  
Adjustable With a Range of 1.23 V to 37 V and  
±4% Regulation (Max) Over Line, Load, and  
Temperature Conditions  
Pre-Regulator for Linear Regulators  
On-Card Switching Regulators  
Positive-to-Negative Converter (Buck-Boost)  
Specified 1-A Output Current  
Wide Input Voltage Range4.75 V to 40 V  
Uses Readily Available Standard Inductors  
N (PDIP) PACKAGE  
(TOP VIEW)  
52-kHz (Typ) Fixed-Frequency Internal  
Oscillator  
NC  
NC  
V
IN  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
TTL Shutdown Capability With 50-µA (Typ)  
NC  
Standby Current  
OUTPUT  
NC  
NC  
High Efficiencyas High as 88% (Typ)  
GND  
GND  
NC  
Thermal Shutdown and Current-Limit  
Protection With Cycle-by-Cycle Current  
Limiting  
GND  
NC  
FEEDBACK  
NC  
NC  
For the Full Offering of Voltages (Including  
Fixed-Output Options) and Packages  
(Including TO-263), see TL2575 Datasheet  
ON/OFF  
NC − No internal connection  
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 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.  
ORDERING INFORMATION  
VO  
(NOM)  
TJ  
PACKAGE(1)  
Tube of 25  
ORDERABLE PART NUMBER  
TOP-SIDE MARKING  
LM2575IN  
–40°C to 125°C  
ADJ  
PDIP – N  
LM2575IN  
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at  
www.ti.com/sc/package.  
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 © 2005–2006, 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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