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參數(shù)資料
| 型號： | LM2687LD/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.01 A SWITCHED CAPACITOR REGULATOR, 180 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LLP-8 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 297K |
| 代理商： | LM2687LD/NOPB |
LM2687
Low Noise Regulated Switched Capacitor Voltage
Inverter
General Description
The LM2687 CMOS Negative Regulated Switched Capacitor
Voltage Inverter delivers a very low noise adjustable output
for an input voltage in the range of +2.7V to +5.5V. Four low
cost capacitors are used in this circuit to provide up to 10mA
of output current. The regulated output for the LM2687 is
adjustable between 1.5V and 5.2V. The LM2687 operates
at 100 kHz (typical) switching frequency to reduce output
resistance and voltage ripple. With an operating current of
only 500 A (charge pump power efficiency greater than
90% with most loads) and 0.05 A typical shutdown current,
the LM2687 provides ideal performance for cellular phone
power amplifier bias and other low current, low noise nega-
tive voltage needs. The device comes in a small 8-pin MSOP
or LLP package.
Features
n
Inverts and regulates the input supply voltage
n
Small MSOP-8 or LLP-8 package
n
91% typical charge pump power efficiency at 10mA
n
Low output ripple (1mV typical)
n
Shutdown lowers Quiescent current to 0.05 A (typical)
Applications
n
Wireless Communication Systems
n
Cellular Phone Power Amplifier Biasing
n
Interface Power Supplies
n
Handheld Instrumentation
n
Laptop Computers and PDA’s
Typical Application Circuit
10118001
Connection Diagrams
8-Pin MSOP
8-Pin LLP
10118002
10118025
April 2003
LM2687
Low
Noise
Regulated
Switched
Capacitor
V
oltage
Inverter
2003 National Semiconductor Corporation
DS101180
www.national.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2687LDX | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM2687LDX/NOPB | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM2687MM | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM2687MM | 制造商:Texas Instruments 功能描述:VOLT CONVERTER SMD 2687 MSOP8 |
| LM2687MM/NOPB | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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