- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98000 > LM26480SQ-BF/NOPB (NATIONAL SEMICONDUCTOR CORP) 2.4 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, QCC24 PDF資料下載
參數(shù)資料
| 型號： | LM26480SQ-BF/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.4 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, QCC24 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, LLP-24 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 2447K |
| 代理商： | LM26480SQ-BF/NOPB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
Faults Occurring in Counter Delay After Startup
30040407
The above timing diagram details the Power Good with delay
with respect to the enable signals EN1, and EN2. The RDY1,
RDY2 are internal signals derived from the output of two com-
parators. Each comparator has been trimmed as follows:
Comparator Level
Buck Supply Level
HIGH
Greater than 91%
LOW
Less than 82%
The circuits for EN1 and RDY1 are symmetrical to EN2 and
RDY2, so each reference to EN1 and RDY1 will also work for
EN2 and RDY2 and vice versa.
If EN1 and RDY1 signals are High at time t1, then the RDY1
signal rising edge triggers the programmable delay counter
(50
μs, 50 ms, 100 ms, 200 ms). This delay forces nPOR LOW
between time interval t1 and t2. NPOR is then pulled high after
the programmable delay is completed. Now if EN2 and RDY2
are initiated during this interval the nPOR signal ignores this
event.
If either RDY1or RDY2 were to go LOW at t3 then the pro-
grammable delay is triggered again.
www.national.com
18
LM26480
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM26480SQX-BF/NOPB | 2.4 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, QCC24 |
| LM2661M/NOPB | SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2660MMX/NOPB | SWITCHED CAPACITOR CONVERTER, 40 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2661MM/NOPB | SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2661MMX/NOPB | SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM26480SQX-AA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators |
| LM26480SQX-AA/NOPB | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| LM26480SQX-BF | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators |
| LM26480SQX-BF/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Externally Pgrm Dual Hi-Current SD DC/DC RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM26484 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Power Management Unit |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。