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參數(shù)資料
| 型號： | TPS54418RTER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6.4 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, WQFN-16 |
| 文件頁數(shù)： | 5/35頁 |
| 文件大?。?/td> | 1356K |
| 代理商： | TPS54418RTER |
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SS
TPS54418
EN
PWRGD
SS
EN
PWRGD
EN1=2V/div
PWRGD1=2V/div
Vout1=1/div
Vout2=1V/div
Time=5msec/div
EN1=2V/div
Vout1=1V/div
Vout2=1V/div
Time=5msec/div
SS
TPS54418
EN
PWRGD
SS
TPS54418
EN
PWRGD
www.ti.com
SLVS946A – MAY 2009 – REVISED MAY 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 TPS54418 stops switching and the SS is discharged to 0 volts before reinitiating a powering up
sequence.
SEQUENCING
Many of the common power supply sequencing methods can be implemented using the SS, 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
TPS54418 which enables the second power supply once the primary supply reaches regulation.
Ratiometric start up can be accomplished by connecting the SS 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 ratiometric method is illustrated in Figure 26.
Figure 24. Sequential Start-Up Sequence
Figure 25. Sequential Startup using EN and
PWRGD
Figure 26. Schematic for Ratiometric Start-Up
Figure 27. Ratiometric Start-Up using Coupled SS
Sequence
Pins
Copyright 2009–2010, Texas Instruments Incorporated
13
Product Folder Link(s): TPS54418
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PDF描述 |
|---|---|
| TPS54426PWP | 7.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| TPS54429PWP | 0.01 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| TPS5450MDDAREP | 11.7 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS54519RTER | 8 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PQCC16 |
| TPS54612MPWPREP | 12 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO28 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54418RTERG4 | 制造商:Texas Instruments 功能描述: |
| TPS54418RTET | 功能描述:直流/直流開關調(diào)節(jié)器 2.95-6Vin 4A 2MHz Synch St Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54424RNVT | 功能描述:4.5V TO 17V INPUT, CURRENT MODE, 制造商:texas instruments 系列:SWIFT?? 包裝:剪切帶（CT） 零件狀態(tài):在售 功能:降壓 輸出配置:正 拓撲:降壓 輸出類型:可調(diào)式 輸出數(shù):1 電壓 - 輸入（最小值）:4.5V 電壓 - 輸入（最大值）:17V 電壓 - 輸出（最小值/固定）:0.6V 電壓 - 輸出（最大值）:12V 電流 - 輸出:4A 頻率 - 開關:200kHz ~ 1.6MHz 同步整流器:是 工作溫度:-40°C ~ 150°C（TJ） 安裝類型:表面貼裝 封裝/外殼:18-VFQFN 供應商器件封裝:18-VQFN-HR（3.5x3.5） 標準包裝:1 |
| TPS54425 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT?) |
| TPS54425_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT?) |
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