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參數(shù)資料
| 型號： | LM3674MFX-2.8 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5; Package: SOT-23; No of Pins: 5; Qty per Container: 3000; Container: Reel |
| 中文描述： | 1.2 A SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 1/15頁 |
| 文件大小： | 1102K |
| 代理商： | LM3674MFX-2.8 |
LM3674
2MHz, 600mA Step-Down DC-DC Converter in SOT 23-5
General Description
The LM3674 step-down DC-DC converter is optimized for
powering low voltage circuits from a single Li-Ion cell battery
and input voltage rails from 2.7V to 5.5V. It provides up to
600mA load current, over the entire input voltage range.
There are several fixed output voltages and adjustable out-
put voltage versions.
The device offers superior features and performance for
mobile phones and similar portable systems. During PWM
mode, the device operates at a fixed-frequency of 2 MHz
(typ). Internal synchronous rectification provides high effi-
ciency during PWM mode operation. In shutdown mode, the
device turns off and reduces battery consumption to 0.01 A
(typ).
The LM3674 is available in SOT23-5 in leaded (PB) and
lead-free (NO PB) versions. A high switching frequency of 2
MHz (typ) allows use of only three tiny external surface-
mount components, an inductor and two ceramic capacitors.
Features
n
600mA max load current
n
Input voltage range from 2.7V to 5.5V
n
Available in fixed and adjustable output voltages ranging
from 1.0V to 3.3V
n
Operates from a single Li-Ion cell Battery
n
Internal synchronous rectification for high efficiency
n
Internal soft start
n
0.01 A typical shutdown current
n
2 MHz PWM fixed switching frequency (typ)
n
SOT23-5 package
n
Current overload protection and Thermal shutdown
protection
Applications
n
Mobile phones
n
PDAs
n
MP3 players
n
Portable instruments
n
W-LAN
n
Digital still cameras
n
Portable Hard disk drives
Typical Application
20167201
FIGURE 1. Typical Application Circuit
September 2006
LM3674
2MHz,
600mA
Step-Down
DC-DC
Converter
in
SOT
23-5
2006 National Semiconductor Corporation
DS201672
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3674MFX-ADJ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3674MFX-ADJ/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3676 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2MHz, 600mA Step-Down DC-DC Converter with Mode Control |
| LM3676SD-1.5 | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3676SD-1.5/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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