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參數(shù)資料
| 型號： | LM2621MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Low Input Voltage, Step-Up DC-DC Converter |
| 中文描述： | 2.85 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MINI, SO-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 254K |
| 代理商： | LM2621MM |
LM2621
Low Input Voltage, Step-Up DC-DC Converter
General Description
The LM2621 is a high efficiency, step-up DC-DC switching
regulator for battery-powered and low input voltage systems.
It accepts an input voltage between 1.2V and 14V and con-
verts it into a regulated output voltage. The output voltage
can be adjusted between 1.24V and 14V. It has an internal
0.17
N-Channel MOSFET power switch. Efficiencies up to
90% are achievable using the LM2621.
The high switching frequency (adjustable up to 2MHz) of the
LM2621 allows for tiny surface mount inductors and capaci-
tors. Because of the unique constant-duty-cycle gated oscil-
lator topology very high efficiencies are realized over a wide
load range. The supply current is reduced to 80μA because
of the BiCMOS process technology. In the shutdown mode,
the supply current is less than 2.5μA.
The LM2621 is available in a Mini-SO-8 package. This pack-
age uses half the board area of a standard 8-pin SO and has
a height of just 1.09 mm.
Features
n
Small Mini-SO8 Package (Half the Footprint of Standard
8-Pin SO Package)
n
1.09 mm Package Height
n
Up to 2 MHz Switching Frequency
n
1.2V to 14V Input Voltage
n
1.24V - 14V Adjustable Output Voltage
n
Up to 1A Load Current
n
0.17
Internal MOSFET
n
Up to 90% Regulator Efficiency
n
80 μA Typical Operating Current
n
<
2.5μA Guaranteed Supply Current In Shutdown
Applications
n
PDAs, Cellular Phones
n
2-Cell and 3-Cell Battery-Operated Equipment
n
PCMCIA Cards, Memory Cards
n
Flash Memory Programming
n
TFT/LCD Applications
n
3.3V to 5.0V Conversion
n
GPS Devices
n
Two-Way Pagers
n
Palmtop Computers
n
Hand-Held Instruments
Typical Application Circuit
DS100934-12
February 2000
L
2000 National Semiconductor Corporation
DS100934
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2621MM | 制造商:Texas Instruments 功能描述:DC/DC UP CONVERTER ADJ SMD 2621 |
| LM2621MM/NOPB | 功能描述:DC/DC 開關(guān)控制器 LOW INP VLTG,STEP-UP DC-DC 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 |
| LM2621MM/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2621MMX | 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 |
| LM2621MMX/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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