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參數(shù)資料
| 型號： | LM2586SX-12/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | TO-263, 7 PIN |
| 文件頁數(shù)： | 1/30頁 |
| 文件大?。?/td> | 1273K |
| 代理商： | LM2586SX-12/NOPB |
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LM2586
SIMPLE SWITCHER 3A Flyback Regulator with
Shutdown
General Description
The LM2586 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 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 an adjustable frequency oscillator that can be pro-
grammed up to 200 kHz. The oscillator can also be synchro-
nized with other devices, so that multiple devices can oper-
ate at the same switching frequency.
Other features include soft start mode to reduce in-rush
current during start up, and current mode control for im-
proved rejection of input voltage and output load transients
and cycle-by-cycle current limiting. The device also has a
shutdown pin, so that it can be turned off externally. An
output voltage tolerance of ±4%, within specified input volt-
ages 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 3.0A, can stand off 65V
n
Wide input voltage range: 4V to 40V
n
Adjustable switching frequency: 100 kHz to 200 kHz
n
External shutdown capability
n
Draws less than 60 A when shut down
n
Frequency synchronization
n
Current-mode operation for improved transient
response, line regulation, and current limit
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
Forward converter
n
Multiple-output regulator
n
Simple boost regulator
Connection Diagrams
Bent, Staggered Leads
7-Lead TO-220 (T)
Top View
Bent, Staggered Leads
7-Lead TO-220 (T)
Side View
01251617
01251618
Order Number LM2586T3.3, LM2586T-5.0,
LM2586T-12 or LM2586T-ADJ
See NS Package Number TA07B
SIMPLE SWITCHER and Switchers Made Simple are registered trademarks of National Semiconductor Corporation.
July 2005
LM2586
SIMPLE
SWITCHER
3A
Flyback
Regulator
with
Shutdown
2005 National Semiconductor Corporation
DS012516
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2586SX-3.3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2586SX-3.3/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2586SX-5.0 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2586SX-5.0/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2586SX-ADJ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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