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TL2575-33I PDF预览

TL2575-33I

更新时间： 2024-11-09 03:59:35
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德州仪器 - TI 稳压器开关
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28页 957K
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1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS

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TL2575-33I 数据手册

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TL2575, TL2575HV  
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS  
www.ti.com  
SLVS638B–MAY 2006–REVISED JANUARY 2007  
FEATURES  
KTT (TO-263) PACKAGE  
(TOP VIEW)  
•
Fixed 3.3-V, 5-V, 12-V, and 15-V Options With  
±5% Regulation (Max) Over Line, Load, and  
Temperature Conditions  
5
4
3
ON/OFF  
FEEDBACK  
GND  
OUTPUT  
VIN  
•
Adjustable Option With a Range of 1.23 V to  
37 V (57 V for HV Version) and ±4%  
Regulation (Max) Over Line, Load, and  
Temperature Conditions  
2
1
N (PDIP) PACKAGE  
(TOP VIEW)  
•
•
Specified 1-A Output Current  
Wide Input Voltage Range…4.75 V to 40 V  
(60 V for HV Version)  
NC  
NC  
VIN  
NC  
NC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
•
Require Only Four External Components  
(Fixed Versions) and Use Readily Available  
Standard Inductors  
OUTPUT  
NC  
GND  
GND  
NC  
GND  
•
•
52-kHz (Typ) Fixed-Frequency Internal  
Oscillator  
NC  
FEEDBACK  
NC  
NC  
TTL Shutdown Capability With 50-µA (Typ)  
ON/OFF  
Standby Current  
NC − No internal connection  
•
•
High Efficiency…as High as 88% (Typ)  
KV (TO-220 STAGGERED LEADS) PACKAGE  
Thermal Shutdown and Current-Limit  
Protection With Cycle-by-Cycle Current  
Limiting  
(TOP VIEW)  
(SIDE VIEW)  
5
ON/OFF  
FEEDBACK  
GND  
OUTPUT  
VIN  
4
3
2
1
APPLICATIONS  
•
Simple High-Efficiency Step-Down (Buck)  
Regulators  
•
•
•
Pre-Regulators for Linear Regulators  
On-Card Switching Regulators  
Positive-to-Negative Converters (Buck-Boost)  
Pins 1, 3, 5  
Pins 2, 4  
DESCRIPTION/ORDERING INFORMATION  
The TL2575 and TL2575HV greatly simplify 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 of up to 60 V (HV version) and available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, or  
an adjustable-output version, the TL2575 and TL2575HV have 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 TL2575 and TL2575HV represent superior alternatives to popular three-terminal linear regulators. Due to  
their high efficiency, the devices significantly reduce the size of the heatsink and, in many cases, no heatsink is  
required. Optimized for use with standard series of inductors available from several different manufacturers, the  
TL2575 and TL2575HV greatly simplify the design of switch-mode power supplies by requiring a minimal  
addition of only four to six external components for operation.  
The TL2575 and TL2575HV are 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.  
PowerPAD, PowerFLEX are trademarks of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2006–2007, 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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