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LM2575T-ADJ 参数 Datasheet PDF下载

LM2575T-ADJ图片预览
型号: LM2575T-ADJ
PDF下载: 下载PDF文件 查看货源
内容描述: LM1575 / LM2575 / LM2575HV SIMPLE SWITCHER 1A降压型稳压器 [LM1575/LM2575/LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator]
分类和应用: 稳压器开关局域网
文件页数/大小: 43 页 / 5992 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SNVS106E – MAY 1999 – REVISED APRIL 2013
LM1575/LM2575/LM2575HV SIMPLE SWITCHER
®
1A Step-Down Voltage Regulator
Check for Samples:
1
FEATURES
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
Specified 1A Output Current
Wide Input Voltage Range, 40V up to 60V 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
P
+
Product Enhancement Tested
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.
Requiring a minimum number of external
components, these regulators are simple to use and
include internal frequency compensation and a fixed-
frequency oscillator.
The LM2575 series offers a high-efficiency
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.
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.
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.
23
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
2
3
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.
All other trademarks are the property of their respective owners.
Copyright © 1999–2013, Texas Instruments Incorporated
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.