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參數(shù)資料
| 型號： | TPS54974PWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 16 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數(shù)： | 2/21頁 |
| 文件大小： | 743K |
| 代理商： | TPS54974PWP |
www.ti.com
AGND
BOOT
VSENSE
COMP
PWRGD
PH
RT
SYNC
SS/ENA
VBIAS
VIN
PVIN
PGND
VOUT
PH
PVIN
TOPSIDE GROUND AREA
VIA to Ground Plane
ANALOG GROUND TRACE
COMPENSATION
NETWORK
OUTPUT INDUCTOR
OUTPUT
FILTER
CAPACITOR
BOOT
CAPACITOR
INPUT
BYPASS
CAPACITOR
INPUT
BULK
FILTER
FREQUENCY SET RESISTOR
SLOW-START
CAPACITOR
BIAS CAPACITOR
INPUT
BYPASS
CAPACITOR
VIN
AREA
EXPOSED
POWERPAD
TPS54974
SLVS458B – JANUARY 2003 – REVISED FEBRUARY 2005
Connect the boot capacitor between the phase node
Place the compensation components from the VOUT
and the BOOT pin as shown. Keep the boot capacitor
trace to the VSENSE and COMP pins. Do not place
close to the IC and minimize the conductor trace
these components too close to the PH trace. Due to
lengths.
the size of the IC package and the device pinout,
they have to be routed somewhat close, but maintain
Connect the output filter capacitor(s) as shown be-
as much separation as possible while still keeping the
tween the VOUT trace and PGND. It is important to
layout compact.
keep the loop formed by the PH pins, Lout, Cout, and
PGND as small as practical.
Connect the bias capacitor from the VBIAS pin to
analog ground using the isolated analog ground
trace. If an RT resistor or slow-start capacitor is used,
connect them to this trace as well.
Figure 12. PCB Layout for 28-Pin PWP PowerPAD
10
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