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參數資料
| 型號： | LM2705 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Micropower Step-up DC/DC Converter with 150mA Peak Current Limit |
| 中文描述： | 微功耗升壓型DC / DC 150mA的峰值電流限制轉換器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 367K |
| 代理商： | LM2705 |
LM2705
Micropower Step-up DC/DC Converter with 150mA Peak
Current Limit
General Description
The LM2705 is a micropower step-up DC/DC in a small
5-lead SOT-23 package. A current limited, fixed off-time
control scheme conserves operating current resulting in high
efficiency over a wide range of load conditions. The 21V
switch allows for output voltages as high as 20V. The low
400ns off-time permits the use of tiny, low profile inductors
and capacitors to minimize footprint and cost in space-
conscious portable applications. The LM2705 is ideal for
LCD panels requiring low current and high efficiency as well
as white LED applications for cellular phone back-lighting.
The LM2705 can drive up to 3 white LEDs from a single
Li-Ion battery. The low peak inductor current of the LM2705
makes it ideal for USB applications.
Features
n
150mA, 0.7
, internal switch
n
Uses small surface mount components
n
Adjustable output voltage up to 20V
n
2.2V to 7V input range
n
Input undervoltage lockout
n
0.01μA shutdown current
n
Small 5-Lead SOT-23 package
Applications
n
LCD Bias Supplies
n
White LED Back-Lighting
n
Handheld Devices
n
Digital Cameras
n
Portable Applications
Typical Application Circuit
20039701
FIGURE 1. Typical 20V Application
April 2003
L
2003 National Semiconductor Corporation
DS200397
www.national.com
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| LM2705MF-ADJ | Micropower Step-up DC/DC Converter with 150mA Peak Current Limit |
| LM2705MFX-ADJ | Micropower Step-up DC/DC Converter with 150mA Peak Current Limit |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2705_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Micropower Step-up DC/DC Converter with 150mA Peak Current Limit |
| LM2705MF-ADJ | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2705MF-ADJ | 制造商:Texas Instruments 功能描述:IC PFM DC/DC CONV ADJ POWERWISE |
| LM2705MF-ADJ/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM2705MFX-ADJ | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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