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参数资料
| 型号： | LM2587SX-3.3/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封装： | TO-263, 5 PIN |
| 文件页数： | 1/27页 |
| 文件大小： | 819K |
| 代理商： | LM2587SX-3.3/NOPB |
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LM2587
SIMPLE SWITCHER 5A Flyback Regulator
General Description
The LM2587 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 ad-
justable.
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 regu-
lators. Also listed are selector guides for diodes and capaci-
tors and a family of standard inductors and flyback trans-
formers designed to work with these switching regulators.
The power switch is a 5.0A 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 limit-
ing. An output voltage tolerance of ±4%, within specified
input voltages and output load conditions, is guaranteed for
the power supply system.
Features
n
Requires few external components
n
Family of standard inductors and transformers
n
NPN output switches 5.0A, can stand off 65V
n
Wide input voltage range: 4V to 40V
n
Current-mode operation for improved transient
response, line regulation, and current limit
n
100 kHz switching frequency
n
Internal soft-start function reduces in-rush current during
start-up
n
Output transistor protected by current limit, under
voltage lockout, and thermal shutdown
n
System Output Voltage Tolerance of ±4% max over line
and load conditions
Typical Applications
n
Flyback regulator
n
Multiple-output regulator
n
Simple boost regulator
n
Forward converter
Flyback Regulator
01231601
Ordering Information
Package Type
NSC Package
Order Number
Drawing
5-Lead TO-220 Bent, Staggered Leads
T05D
LM2587T-3.3, LM2587T-5.0, LM2587T-12, LM2587T-ADJ
5-Lead TO-263
TS5B
LM2587S-3.3, LM2587S-5.0, LM2587S-12, LM2587S-ADJ
5-Lead TO-263 Tape and Reel
TS5B
LM2587SX-3.3, LM2587SX-5.0, LM2587SX-12,
LM2587SX-ADJ
SIMPLE SWITCHER and Switchers Made Simple are registered trademarks of National Semiconductor Corporation.
February 2004
LM2587
SIMPLE
SWITCHER
5A
Flyback
Regulator
2004 National Semiconductor Corporation
DS012316
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM2588-12MWC | 9.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, UUC |
| LM2588-12MDC | 9.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, UUC |
| LM2588-ADJMWC | 9.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, UUC |
| LM2588T-12/NOPB | 9.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSFM7 |
| LM2590HV3.3MDC | 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2587SX-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 |
| LM2587SX-5.0/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 |
| LM2587SXADJ | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Up 4V to 40V 6-Pin(5+Tab) TO-263 T/R |
| LM2587SX-ADJ | 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 |
| LM2587SX-ADJ/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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