參數(shù)資料
型號(hào)： LM26480QSQ-CF/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 2.4 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, QCC24
封裝： 4 X 4 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, LLP-24
文件頁(yè)數(shù)： 13/30頁(yè)
文件大?。?/td> 2455K
代理商： LM26480QSQ-CF/NOPB
Design Implementation of the Flexible Power-On Reset
30040409
Design implementation of the flexible power-on reset. An in-
ternal power-on reset of the IC is used with EN1 and EN2 to
produce a reset signal (LOW) to the delay timer nPOR. EN1
and RDY1 or EN2 and RDY2 are used to generate the set
signal (HIGH) to the delay timer. S=R=1 never occurs. The
mask timers are triggered off EN1 and EN2 which are gated
with RDY1, and RDY2 to generate outputs to the final AND
gate to generate the nPOR.
UNDER VOLTAGE LOCK OUT
The LM26480 features an “under voltage lock out circuit”. The
function of this circuit is to continuously monitor the raw input
supply voltage (VINLDO12) and automatically disables the
four voltage regulators whenever this supply voltage is less
than 2.8 VDC.
The circuit incorporates a bandgap based circuit that estab-
lishes the reference used to determine the 2.8 VDC trip point
for a V
IN OK – Not OK detector. This VIN OK signal is then
used to gate the enable signals to the four regulators of the
LM26480. When VINLDO12 is greater than 2.8 VDC the four
enables
control the four regulators, when VINLDO12 is less
than 2.8 VDC the four regulators are disabled by the V
IN de-
tector being in the “Not OK” state. The circuit has built in
hysteresis to prevent chattering occurring.
www.national.com
20
LM26480
相關(guān)PDF資料
PDF描述
LM26480SQ-BF/NOPB 2.4 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, QCC24
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM26480QSQX-8D/NOPB 制造商:Texas Instruments 功能描述:Externally Programmable Dual High-Curren
LM26480QSQX-AA/NOPB 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
LM26480QSQX-CF/NOPB 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
LM26480SQ-AA 制造商:Texas Instruments 功能描述:DC/ DC STEP DOWN, DUAL LINEAR REG, IC
LM26480SQ-AA/NOPB 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) DUAL HI-CRNT STEP- DOWN DC/DC RoHS:否 制造商:STMicroelectronics 輸出類(lèi)型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
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