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參數(shù)資料
| 型號： | LM2672M-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| 中文描述： | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 895K |
| 代理商： | LM2672M-5.0 |
Test Circuit and Layout Guidelines
(Continued)
LM2672 Series Buck Regulator
Design Procedure (Fixed Output)
PROCEDURE (Fixed Output Voltage Version)
To simplify the buck regulator design procedure, National
Semiconductor is making available computer design software to
be used with the
SIMPLE SWITCHER
line of switching
regulators.
LM267X Made Simple
version 1.0 is available on
Windows
3.1, NT, or 95 operating systems.
Given:
V
OUT
= Regulated Output Voltage (3.3V, 5V, or 12V)
V
IN
(max) = Maximum DC Input Voltage
I
LOAD
(max) = Maximum Load Current
EXAMPLE (Fixed Output Voltage Version)
Given:
V
OUT
= 5V
V
IN
(max) = 12V
I
LOAD
(max) = 1A
01293423
C
IN
- 22 μF, 50V Tantalum, Sprague “199D Series”
C
OUT
- 47 μF, 25V Tantalum, Sprague “595D Series”
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68 μH Sumida #RCR110D-680L
R1 - 1.5 k
, 1%
C
B
- 0.01 μF, 50V Ceramic
For a 5V output, select R2 to be 4.75 k
, 1%
where V
REF
= 1.21V
Use a 1% resistor for best stability.
FIGURE 3. Standard Test Circuits and Layout Guides
Adjustable Output Voltage Versions
L
www.national.com
10
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| LM2672M-ADJ | SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features |
| LM2673S-12 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2672M-ADJ | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2672M-ADJ | 制造商:Texas Instruments 功能描述:SWITCHING REG 1A ADJ 2672 SOIC8 |
| LM2672M-ADJ/NOPB | 功能描述:直流/直流開關轉換器 HIGH EFF 1A STEP- DOWN VLTG REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2672M-ADJ/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2672MX-12 | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
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