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参数资料
| 型号： | LM2585-5.0MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 21/29页 |
| 文件大小： | 708K |
| 代理商： | LM2585-5.0MDC |
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National P/N LM2585 - SIMPLE SWITCHER 3-Amp Flyback Regulator
LM2585-12
MWC
Full
production
N/A
wafer
jar
of
N/A
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LM2585-5.0
MWC
Full
production
N/A
wafer
jar
of
N/A
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LM2585-ADJ
MWC
Full
production
N/A
wafer
jar
of
N/A
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General Description
The LM2585 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up
(boost), and forward converter applications. The device is available in 4 different output voltage versions:
3.3V, 5.0V, 12V, and adjustable.
Requiring a minimum number of external components, these regulators are cost effective, and simple to use.
Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides
for diodes and capacitors and a family of standard inductors and flyback transformers designed to work with
these switching regulators.
The power switch is a 3.0A NPN device that can stand-off 65V. Protecting the power switch are current and
thermal limiting circuits, and an undervoltage lockout circuit. This IC contains a 100 kHz fixed-frequency
internal oscillator that permits the use of small magnetics. Other features include soft start mode to reduce
in-rush current during start up, current mode control for improved rejection of input voltage and output load
transients and cycle-by-cycle current limiting. An output voltage tolerance of ±4%, within specified input
voltages and output load conditions, is guaranteed for the power supply system.
Features
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Requires few external components
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Family of standard inductors and transformers
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NPN output switches 3.0A, can stand off 65V
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Wide input voltage range: 4V to 40V
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Current-mode operation for improved transient response, line regulation, and current limit
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100 kHz switching frequency
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Internal soft-start function reduces in-rush current during start-up
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Output transistor protected by current limit, under voltage lockout, and thermal shutdown
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System Output Voltage Tolerance of ±4% max over line and load conditions
Applications
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Flyback regulator
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Multiple-output regulator
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Simple boost regulator
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Forward converter
Design Tools
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2585.html (3 of 4) [Aug-09-2002 2:06:54 PM]
相关PDF资料 |
PDF描述 |
|---|---|
| LM2585-5.0MWC | 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, UUC |
| LM2585-12MDC | 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, UUC |
| LM2585-12MWC | 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, UUC |
| LM2631MTC-ADJ/NOPB | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| LM2635M/NOPB | SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2585S-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 |
| LM2585S-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 |
| LM2585S-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 |
| LM2585S-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 |
| LM2585S-5.0 | 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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