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參數資料
型號: TPS54429PWP
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩壓器
英文描述: 0.01 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14
封裝: GREEN, PLASTIC, HTSSOP-14
文件頁數: 4/22頁
文件大小: 651K
代理商: TPS54429PWP
U1
TPS54429PWP
V
=
OUT
0.765
(1+
R1
R2
)
V
=
V
OUT
OUT_SET
(0.763 + 0.0017
)
1 +
( R1
R2
)
1
2
P
OUT
F
L
C
p
=
SLVSAS1
– FEBRUARY 2011
DESIGN GUIDE
Step By Step Design Procedure
To begin the design process, you must know a few application parameters:
Input voltage range
Output voltage
Output current
Output voltage ripple
Input voltage ripple
Figure 13. Shows the schematic diagram for this design example.
Output Voltage Resistors Selection
The output voltage is set with a resistor divider from the output node to the VFB pin. It is recommended to use
1% tolerance or better divider resistors. Start by using Equation 2 and Equation 3 to calculate VOUT.
To improve efficiency at very light loads consider using larger value resistors, too high of resistance will be more
susceptible to noise and voltage errors from the VFB input current will be more noticeable.
For output voltage from 0.76 V to 2.5 V:
(2)
For output voltage over 2.5 V:
(3)
Where:
VOUT_SET = Target VOUT voltage.
Output Filter Selection
The output filter used with the TPS54429 is an LC circuit. This LC filter has double pole at:
(4)
12
2011, Texas Instruments Incorporated
Product Folder Link(s) :TPS54429
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相關代理商/技術參數
參數描述
TPS54429PWPR 功能描述:直流/直流開關調節器 7V-18Vin,4.5A Sync Step-Down DCAP2 Mode 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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54478 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.95-V to 6-V Input, 4-A Output, 2-MHz, Synchronous Step-Down
TPS54478EVM-037 功能描述:電源管理IC開發工具 TPS54478 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS54478RTER 功能描述:直流/直流開關調節器 2.95V-6Vin,6A,Sync Step-Down Converter 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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54478RTET 功能描述:直流/直流開關調節器 2.95V-6Vin,6A,Sync Step-Down Converter 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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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