參數(shù)資料
型號: LM3671MF-1.875
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
中文描述: 1.15 A SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PDSO5
封裝: 2.92 X 2.84 MM, 1.20 MM HEIGHT, SOT-23, 5 PIN
文件頁數(shù): 1/16頁
文件大?。?/td> 967K
代理商: LM3671MF-1.875
LM3671
2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
General Description
The LM3671 step-down DC-DC converter is optimized for
powering ultra-low voltage circuits from a single Li-Ion cell or
3 cell NiMH/NiCd batteries. It provides up to 600mA load
current, over an input voltage range from 2.8V to 5.5V. There
are several different fixed voltage output options available as
well as an adjustable output voltage version.
The device offers superior features and performance for
mobile phones and similar portable applications with com-
plex power management systems. Automatic intelligent
switching between PWM low-noise and PFM low-current
mode offers improved system control. During full-power op-
eration, a fixed-frequency 2 MHz (typ). PWM mode drives
loads from
70 mA to 600 mA max. Hysteretic PFM mode
extends the battery life through reduction of the quiescent
current to 16 μA (typ) at light loads and system standby.
Internal synchronous rectification provides high efficiency. In
shutdown mode (Enable pin pulled low) the device turns off
and reduces battery consumption to 0.01 μA (typ).
The LM3671 is available in a SOT23-5 package with Pb and
No Pb (Lead free) versions. A high switching frequency - 2
MHz (typ) - allows use of tiny surface-mount components.
Only three external surface-mount components, an inductor
and two ceramic capacitors, are required.
Features
n
16 μA typical quiescent current
n
600 mA maximum load capability
n
2 MHz PWM fixed switching frequency (typ)
n
Automatic PFM/PWM mode switching
n
Available in fixed output voltages and adjustable version
n
SOT23-5 package
n
Internal synchronous rectification for high efficiency
n
Internal soft start
n
0.01 μA typical shutdown current
n
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd
batteries
n
Only three tiny surface-mount external components
required (one inductor, two ceramic capacitors)
n
Current overload and Thermal shutdown protection
Applications
n
Mobile phones
n
PDAs
n
MP3 players
n
W-LAN
n
Portable instruments
n
Digital still cameras
n
Portable Hard disk drives
Typical Application Circuits
20108401
FIGURE 1. Typical Application Circuit
November 2004
L
2004 National Semiconductor Corporation
DS201084
www.national.com
相關(guān)PDF資料
PDF描述
LM3671MF-ADJ 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MFX-1.2 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MFX-1.25 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MFX-1.375 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
LM3671MFX-1.5 2MHz , 600mA Step-Down DC-DC Converter in SOT23-5
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM3671MF-2.5 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
LM3671MF-2.5/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
LM3671MF-2.8 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
LM3671MF-2.8/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
LM3671MF-3.3 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