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參數(shù)資料
| 型號(hào)： | LM2594HV-12MWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC |
| 封裝： | WAFER |
| 文件頁數(shù)： | 26/33頁 |
| 文件大?。?/td> | 837K |
| 代理商： | LM2594HV-12MWC |
National P/N LM2594 - SIMPLE SWITCHER Power Converter 150 KHz 0.5A Step-Down Voltage Regulator
LM2594HVADJ
MWC
Full
production
N/A
wafer
jar
of
N/A
-
General Description
The LM2594/LM2594HV 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 a 8-lead DIP and a 8-lead surface mount package.
Requiring a minimum number of external components, these regulators are simple to use and feature
internal frequency compensation, a fixed-frequency oscillator, and improved line and load regulation
specifications.
The LM2594/LM2594HV 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 LM2594/LM2594HV 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 frequency reducing current limit
for the output switch and an over temperature shutdown for complete protection under fault conditions.
The LM2594HV is for applications requiring an input voltage up to 60V.
Features
q
3.3V, 5V, 12V, and adjustable output versions
q
Adjustable version output voltage range, 1.2V to 37V (57V for the HV version)±4% max over line and
load conditions
q
Available in 8-pin surface mount and DIP-8 package
q
Guaranteed 0.5A output current
q
Input voltage range up to 60V
q
Requires only 4 external components
q
150 kHz fixed frequency internal oscillator
q
TTL Shutdown capability
q
Low power standby mode, IQ typically 85 A
q
High Efficiency
q
Uses readily available standard inductors
q
Thermal shutdown and current limit protection
Applications
q
Simple high-efficiency step-down (buck) regulator
q
Efficient pre-regulator for linear regulators
q
On-card switching regulators
q
Positive to Negative convertor
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2594.html (4 of 5) [Aug-09-2002 2:25:55 PM]
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2594HVM-12 | 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 |
| LM2594HVM-12/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 150KHZ 0.5A STEP- DOWN VLTG REG 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 |
| LM2594HVM-12/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2594HVM-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 |
| LM2594HVM-3.3/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 150KHZ 0.5A STEP- DOWN VLTG REG 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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