參數(shù)資料
型號(hào)： TPS54319RTE
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PQCC16
封裝： 3 X 3 MM, GREEN, PLASTIC, WQFN-16
文件頁(yè)數(shù)： 5/36頁(yè)
文件大?。?/td> 1271K
代理商： TPS54319RTE
SS2
TPS54319
EN2
PWRGD2
SS1
EN1
PWRGD1
Vo u t 2
Vo u t 1
P W R G D 1
E N 2
EN1
www.ti.com
SLVSA83 – JUNE 2010
If during normal operation, the VIN goes below the UVLO, EN pin pulled below 1.2 V, or a thermal shutdown
event occurs, the TPS54319 stops switching. When the VIN goes above UVLO, EN is released or pulled high, or
a thermal shutdown is exited, then SS/TR is discharged to below 40 mV before reinitiating a powering up
sequence. The VSENSE voltage will follow the SS/TR pin voltage with a 35mV offset up to 85% of the internal
voltage reference. When the SS/TR voltage is greater than 85% on the internal reference voltage the offset
increases as the effective system reference transitions from the SS/TR voltage to the internal voltage reference.
SEQUENCING
Many of the common power supply sequencing methods can be implemented using the SS/TR, EN and PWRGD
pins. The sequential method can be implemented using an open drain or collector output of a power on reset pin
of another device. Figure 24 shows the sequential method. The power good is coupled to the EN pin on the
TPS54319 which enables the second power supply once the primary supply reaches regulation.
Ratio-metric start up can be accomplished by connecting the SS/TR pins together. The regulator outputs ramp
up and reach regulation at the same time. When calculating the slow start time the pull up current source must
be doubled in Equation 4. The ratio metric method is illustrated in Figure 26.
Figure 24. Sequential Start-Up Sequence
Figure 25. Sequential Startup using EN and
PWRGD
Copyright 2010, Texas Instruments Incorporated
13
Product Folder Link(s): TPS54319
相關(guān)PDF資料
PDF描述
TPS54326PWP 5.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14
TPS54326RGTR 5.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PQCC16
TPS54326PWPR 5.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14
TPS54331QDRQ1 2 A SWITCHING REGULATOR, 684 kHz SWITCHING FREQ-MAX, PDSO8
TPS54332DDAR SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54319RTER 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.95-6Vin 3A 2MHz Sync Step-Down SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS54319RTET 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.95-6Vin 3A 2MHz Sync Step-Down SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS54319RTET 制造商:Texas Instruments 功能描述:SYNCHRONOUS STEP-DOWN SWITCHER WITH INTE 制造商:Texas Instruments 功能描述:IC, SYNC STEP-DOWN DC/DC CONVERTER QFN16
TPS5431DDA 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 5.5-23V 3A Step Down Swift Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS5431DDAG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 5.5-23V 3A Step Down Swift Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*