參數(shù)資料
型號(hào)： TPS54140QDRCRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PDSO10
封裝： GREEN, PLASTIC, SON-10
文件頁(yè)數(shù)： 9/50頁(yè)
文件大小： 1602K
代理商： TPS54140QDRCRQ1
SS /TR
TPS54140
EN
PWRGD
SS /TR
EN
PWRGD
EN1
PWRGD1
VOUT1
VOUT2
EN1,EN2
VOUT1
VOUT2
EN
TPS54160
3
SS/TR
4
PWRGD
6
EN
TPS54160
3
SS/TR
4
PWRGD
6
TPS54140
SLVSA24B
– OCTOBER 2009 – REVISED MARCH 2011
DETAILED DESCRIPTION (continued)
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 output of a power on reset pin of another
device. The sequential method is illustrated in Figure 32 using two TPS54140 devices. The power good is
coupled to the EN pin on the TPS54140 which will enable the second power supply once the primary supply
reaches regulation. If needed, a 1nF ceramic capacitor on the EN pin of the second power supply will provide a
1ms start up delay. Figure 33 shows the results of Figure 32.
Figure 32. Schematic for Sequential Start-Up
Figure 33. Sequential Startup using EN and
Sequence
PWRGD
Figure 34. Schematic for Ratiometric Start-Up
Figure 35. Ratio-Metric Startup using Coupled
using Coupled SS/TR Pins
SS/TR pins
Figure 34 shows a method for ratio-metric start up sequence by connecting the SS/TR pins together. The
regulator outputs will 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 6. Figure 35 shows the results of Figure 34.
Copyright
2009–2011, Texas Instruments Incorporated
17
Product Folder Link(s): TPS54140-Q1
相關(guān)PDF資料
PDF描述
TPS54160DRCT SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
TPS54160DGQ 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
TPS54160DGQR 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
TPS5420MDREPG4 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8
TPS5420MDREP 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54160 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, STEP-DOWN SWIFT DC/DC CONVERTER WITH ECO-MODE
TPS54160_08 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60V STEP DOWN SWIFTa?￠ DC/DC CONVERTER WITH ECO-MODEa?￠
TPS54160_11 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, STEP-DOWN SWIFT DC/DC CONVERTER WITH ECO-MODE
TPS54160A 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, Step-Down SWIFTa?￠ DC/DC Converter with Eco-modea?￠
TPS54160A_13 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A, 60-V, Step-Down SWIFT DC/DC Converter with Eco-mode
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

*
*
*