参数资料
型号: TPS40195PWG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16
封装: GREEN, PLASTIC, TSSOP-16
文件页数: 11/43页
文件大小: 1086K
代理商: TPS40195PWG4
Layout Suggestions
1
5
4
3
2
6
8
7
EN
FB
COMP
VDD
UVLO
RT
ILIM
GND
16
12
13
14
15
11
9
10
HDRV
SW
BOOT
LDRV
BP
SS_SEL
PGOOD
SYNC
TPS40195
CBOOT
CBP
Cout
Cin
L
CVDD
PowerGroundPlane
SignalGroundPlane
PowerComponents
SignalComponents
Vout
Vin
1.Keeptheseloopsasshortaspossible.Runoutandreturnlinesclosetogether.
2.Keeptheswitchnodeareaassmallaspossible
3.KeepSignalandPowerGroundsseparate.Connectintoageneralpowerplaneononelayer.
See
note1.
Seenote1.
See
note1.
Seenote1.
Seenote2.
Seenote3.
Seenote1.
www.ti.com ........................................................................................................................................ SLUS720D – FEBRUARY 2007 – REVISED NOVEMBER 2008
Figure 22. Layout Suggestion
Keep the input switching current loop as small as possible.
Place the input capacitor (C
IN) close to the top switching FET The output loop current loop should also be
kept as small as possible.
Keep the SW node as physically small as possible to minimize parasitic capacitance and to minimize radiated
emissions Kelvin connections should be brought from the output to the feedback pin (FB) of the device.
Keep analog and non-switching components away from switching components.
The gate drive trace should be as close to the power FET’s gate as possible.
Make a single point connection from the signal ground to power ground.
Do not allow switching current to flow under the device.
Copyright 2007–2008, Texas Instruments Incorporated
19
Product Folder Link(s): TPS40195
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TPS40195PW SWITCHING CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDSO16
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