參數(shù)資料
型號: TPS5401DGQT
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝: PLASTIC, MSOP-10
文件頁數(shù): 9/41頁
文件大小: 1149K
代理商: TPS5401DGQT
SS /TR
TPS5401
EN
PWRGD
SS /TR
EN
PWRGD
V
EN1
V
PWRGD1
V
OUT1
V
OUT2
V
, V
EN1
EN2
V
OUT1
V
OUT2
EN
TPS54160
3
SS/TR
4
PWRGD
6
EN
TPS54160
3
SS/TR
4
PWRGD
6
TPS5401
www.ti.com
SLVSAB0 – DECEMBER 2010
DETAILED DESCRIPTION (continued)
Figure 30. Schematic for Sequential Start-Up
Figure 31. Sequential Start-Up Using EN and
Sequence
PWRGD
Figure 32. Schematic for Ratiometric Start-Up
Figure 33. Ratiometric Start-Up Using Coupled
Sequence
SS/TR Pins
Figure 32 shows a method for ratiometric start-up sequence 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 pullup
current source must be doubled in Equation 4. Figure 33 shows the results of Figure 32.
Copyright 2010, Texas Instruments Incorporated
17
Product Folder Link(s): TPS5401
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