參數(shù)資料
型號(hào)： TPS54429ERSAT
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.01 A SWITCHING REGULATOR, PQCC16
封裝： PLASTIC, QFN-16
文件頁(yè)數(shù)： 8/26頁(yè)
文件大?。?/td> 907K
代理商： TPS54429ERSAT
VOUT
VFB
VREG5
SS
GND
PG
EN
VIN2
VIN1
VBST
SW2
SW1
PGND1
PGND2
EXPOSED
POWERPAD
AREA
BOOST
CAPACITOR
VOUT
VIA toGroundPlane
OUTPUT
INDUCTOR
OUTPUT
FILTER
CAPACITOR
SLOW
START
CAP
ANALOG
GROUND
TRACE
VIN
INPUT
BYPASS
CAPACITOR
VIN
FEEDBACK
RESISTORS
EtchonBottomLayer
orUnderComponent
ToEnable
Control
POWERGROUND
BIAS
CAP
Additional
Thermal
Vias
Additional
Thermal
Vias
Connectionto
POWERGROUND
oninternalor
bottomlayer
VINOVER
CURRENT
STABILITY
CAPACITOR
SLVSAS0 –FEBRUARY 2011
LAYOUT CONSIDERATIONS
1. Keep the input switching current loop as small as possible.
2. Keep the SW node as physically small and short as possible to minimize parasitic capacitance and
inductance and to minimize radiated emissions. Kelvin connections should be brought from the output to the
feedback pin of the device.
3. Keep analog and non-switching components away from switching components.
4. Make a single point connection from the signal ground to power ground.
5. Do not allow switching current to flow under the device.
6. Keep the pattern lines for VIN and PGND broad.
7. Exposed pad of device must be connected to PGND with solder.
8. VREG5 capacitor should be placed near the device, and connected PGND.
9. Output capacitor should be connected to a broad pattern of the PGND.
10. Voltage feedback loop should be as short as possible, and preferably with ground shield.
11. Lower resistor of the voltage divider which is connected to the VFB pin should be tied to SGND.
12. Providing sufficient via is preferable for VIN, SW and PGND connection.
13. PCB pattern for VIN, SW, and PGND should be as broad as possible.
14. VIN Capacitor should be placed as near as possible to the device.
Figure 16. PCB Layout
16
2011, Texas Instruments Incorporated
Product Folder Link(s) :TPS54429E
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TPS54429PWPR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)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(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
TPS54478 制造商:TI 制造商全稱(chēng):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(kāi)發(fā)工具 TPS54478 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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