參數資料
型號: Si4826DY
廠商: National Semiconductor Corporation
英文描述: N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
中文描述: N溝道場效應管同步降壓穩(wěn)壓控制器輸出電壓低
文件頁數: 17/22頁
文件大?。?/td> 602K
代理商: SI4826DY
Example Circuits
(Continued)
This circuit shows the LM27x7 paired with a cost effective
solution to provide the 5V chip power supply, using no extra
components other than the LM78L05 regulator itself. The
input voltage comes from a ’brick’ power supply which does
not regulate the 12V line tightly.Additional, inexpensive 10uF
ceramic capacitors (Cinx and Cox) help isolate devices with
sensitive databands, such as DSL and cable modems, from
switching noise and harmonics.
In situations where low cost is very important, the LM27x7
can also be used as an asynchronous controller, as shown in
the above circuit. Although a a schottky diode in place of the
bottom FET will not be as efficient, it will cost much less than
the FET. The 5V at low current needed to run the LM27x7
could come from a zener diode or inexpensive regulator,
such as the one shown in
Figure 7
. Because the LM27x7
senses current in the low side MOSFET, the current limit
feature will not function in an asynchronous design. The
ISEN pin should be left open in this case.
20049408
FIGURE 7. 12V Unregulated to 3.3V, 3A, 750kHz
20049409
FIGURE 8. 12V to 5V, 1.8A, 100kHz
L
www.national.com
17
相關PDF資料
PDF描述
Si4442DY N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
SIDC03D60C6 Fast switching diode chip in EMCON 3 -Technology
SIDC03D60F6 Fast switching diode chip in EMCON-Technology
SIDC04D60F6 Fast switching diode chip in EMCON-Technology
SIDC06D120E6 Fast switching diode chip in EMCON-Technology
相關代理商/技術參數
參數描述
SI4826DY-T1 制造商:Vishay Angstrohm 功能描述:Trans MOSFET N-CH 30V 5.3A/7A 8-Pin SOIC N T/R
Si4827-A10-CS 功能描述:射頻接收器 AM/FM/SW RX,16p SOIC RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
Si4827-A10-CSR 功能描述:射頻接收器 AM/FM/SW RX,16p SOIC RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel
SI4828DY 功能描述:MOSFET 30V 7.5/9.6A RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS(導通):0.014 Ohms 配置:Single 最大工作溫度: 安裝風格:Through Hole 封裝 / 箱體:Max247 封裝:Tube
SI4828DY-T1 制造商:Vishay Angstrohm 功能描述:Trans MOSFET N-CH 30V 5.8A/7.5A 8-Pin SOIC N T/R