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參數(shù)資料
| 型號(hào)： | LM2672-3.3MWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| 封裝： | WAFER |
| 文件頁數(shù)： | 22/30頁 |
| 文件大?。?/td> | 576K |
| 代理商： | LM2672-3.3MWC |
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National P/N LM2672 - SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
The LM2672 series of regulators are monolithic integrated circuits built with a LMDMOS process. These
regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A
load current with excellent line and load regulation. These devices are available in fixed output voltages of
3.3V, 5.0V, 12V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include
patented internal frequency compensation (Patent Nos. 5,382,918 and 5,514,947), fixed frequency
oscillator, external shutdown, soft-start, and frequency synchronization.
The LM2672 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Because of its very high
efficiency (>90%), the copper traces on the printed circuit board are the only heat sinking needed.
A family of standard inductors for use with the LM2672 are available from several different manufacturers.
This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also
included in the datasheet are selector guides for diodes and capacitors designed to work in switch-mode
power supplies.
Other features include a guaranteed ±1.5% tolerance on output voltage within specified input voltages and
output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring
typically 50 A stand-by current. The output switch includes current limiting, as well as thermal shutdown for
full protection under fault conditions.
To simplify the LM2672 buck regulator design procedure, there exists computer design software, LM267X
Made Simple version 6.0.
Features
q
Efficiency up to 96%
q
Available in SO-8, 8-pin DIP and LLP packages
q
Computer Design Software LM267X Made Simple version 6.0
q
Simple and easy to design with
q
Requires only 5 external components
q
Uses readily available standard inductors
q
3.3V, 5.0V, 12V, and adjustable output versions
q
Adjustable version output voltage range: 1.21V to 37V
q
±1.5% max output voltage tolerance over line and load conditions
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Guaranteed 1A output load current
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0.25
DMOS Output Switch
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Wide input voltage range: 8V to 40V
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260 kHz fixed frequency internal oscillator
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TTL shutdown capability, low power standby mode
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Soft-start and frequency synchronization
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Thermal shutdown and current limit protection
Applications
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Simple High Efficiency (>90%) Step-Down (Buck) Regulator
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Efficient Pre-Regulator for Linear Regulators
Design Tools
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2672.html (4 of 5) [Aug-09-2002 2:44:36 PM]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2672-ADJMWC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672-12MDC | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, UUC |
| LM2672M-3.3X | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2672M-5.0X | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2672LD-5.0/NOPB | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2672EP | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Enhanced Plastic SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| LM2672LD-12 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| LM2672LD-12/NOPB | 功能描述:IC REG BUCK 12V 1A 16LLP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:SIMPLE SWITCHER® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM2672LD-3.3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM2672LD-3.3/NOPB | 功能描述:IC REG BUCK 3.3V 1A 16-LLP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:SIMPLE SWITCHER® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
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