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参数资料
型号： LM2597-3.3MWA
厂商： NATIONAL SEMICONDUCTOR CORP
元件分类： 稳压器
英文描述： 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC
封装： WAFER
文件页数： 32/40页
文件大小： 1019K
代理商： LM2597-3.3MWA
National P/N LM2597 - SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
LM2597-ADJ
MDC
Die
Full
production
N/A
N/A Samples
tray
of
N/A
-
LM2597HV-5
MDC
Die
Full production
N/A
N/A Samples
tray
of
N/A
-
LM2597HV3.3
MDC
Die
Full production
N/A
N/A Samples
tray
of
N/A
-
LM2597-12
MWC
Wafer
Full
production
N/A
wafer
jar
of
N/A
-
LM2597-ADJ
MWC
Wafer
Full
production
N/A
wafer
jar
of
N/A
-
LM2597HV-5
MWC
Wafer
Full production
N/A
wafer
jar
of
N/A
-
LM2597HV3.3
MWC
Wafer
Full production
N/A
wafer
jar
of
N/A
-
General Description
The LM2597/LM2597HV series of regulators are monolithic integrated circuits that provide all the active
functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and
load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable
output version, and are packaged in an 8-lead DIP and an 8-lead surface mount package.
This series of switching regulators is similar to the LM2594 series, with additional supervisory and
performance features added.
Requiring a minimum number of external components, these regulators are simple to use and include
internal frequency compensation, improved line and load specifications, fixed-frequency oscillator,
Shutdown# /Soft-start, error flag delay and error flag output.
The LM2597/LM2597HV series operates at a switching frequency of 150 kHz thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Because of its high
efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.
A standard series of inductors (both through hole and surface mount types) are available from several
different manufacturers optimized for use with the LM2597/LM2597HV series. This feature greatly simplifies
the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage
and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring
typically 85 A standby current. Self protection features include a two stage current limit for the output
switch and an over temperature shutdown for complete protection under fault conditions.
The LM2597HV is for use in applications requiring and input voltage up to 60V.
Features
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2597.html (4 of 6) [Aug-09-2002 2:31:48 PM]
相关PDF资料
PDF描述
LM2597HV-5MWC 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC
LM2597-5.0MDA 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC
LM2597-5.0MWA 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC
LM2645MTDX/NOPB SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO48
LM2673LDX-12 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14
相关代理商/技术参数
参数描述
LM2597HVM-12 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
LM2597HVM-12/NOPB 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
LM2597HVM-12/NOPB 制造商:Texas Instruments 功能描述:DC/DC Converter IC
LM2597HVM-3.3 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
LM2597HVM-3.3/NOPB 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
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