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LM2576T-ADJ 其他数据使用手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
稳压芯片
封装:
TO-220-5
描述:
TEXAS INSTRUMENTS LM2576T-ADJ 直流-直流开关降压(逐步递减)稳压器, 可调, 4V-40V输入, 1.23V-37V输出, 3A输出, TO-220-5
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引脚图在P3Hot
典型应用电路图在P1P19
原理图在P12
封装尺寸在P31P32P33P34P36P37P38
焊盘布局在P39
标记信息在P31P32P33P34
封装信息在P30P31P32P33P34P35P36P37
技术参数、封装参数在P4P5
应用领域在P1P19
电气规格在P5P6P7P14
型号编号列表在P19P22
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LM2576T-ADJ数据手册
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM2576
,
LM2576HV
SNVS107D –JUNE 1999–REVISED MAY 2016
LM2576xx Series SIMPLE SWITCHER
®
3-A Step-Down Voltage Regulator
1
1 Features
1
• 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output
Versions
• Adjustable Version Output Voltage Range,1.23 V
to 37 V (57 V for HV Version) ±4% Maximum Over
Line and Load Conditions
• Specified 3-A Output Current
• Wide Input Voltage Range: 40 V Up to 60 V for
HV Version
• Requires Only 4 External Components
• 52-kHz Fixed-Frequency Internal Oscillator
• TTL-Shutdown Capability, Low-Power Standby
Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
2 Applications
• Simple High-Efficiency Step-Down (Buck)
Regulator
• Efficient Preregulator for Linear Regulators
• On-Card Switching Regulators
• Positive-to-Negative Converter (Buck-Boost)
3 Description
The LM2576 series of regulators are monolithic
integrated circuits that provide all the active functions
for a step-down (buck) switching regulator, capable of
driving 3-A load with excellent line and load
regulation. These devices are available in fixed output
voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable
output version.
Requiring a minimum number of external
components, these regulators are simple to use and
include fault protection and a fixed-frequency
oscillator.
The LM2576 series offers a high-efficiency
replacement for popular three-terminal linear
regulators. It substantially reduces the size of the
heat sink, and in some cases no heat sink is
required.
A standard series of inductors optimized for use with
the LM2576 are available from several different
manufacturers. This feature greatly simplifies the
design of switch-mode power supplies.
Other features include a ±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.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
LM2576
LM2576HV
TO-220 (5) 10.16 mm × 8.51 mm
DDPAK/TO-263 (5) 10.16 mm × 8.42 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Fixed Output Voltage Version Typical Application Diagram
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