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參數(shù)資料
| 型號： | TPS54377RHF |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT⑩ CONVERTER WITH DISABLED SINKING DURING START-UP |
| 中文描述： | 1.6兆赫，3 - V至6 V輸入，3甲同步降壓轉(zhuǎn)換器的SWIFT⑩與殘疾人沉井在啟動期間 |
| 文件頁數(shù)： | 9/21頁 |
| 文件大小： | 593K |
| 代理商： | TPS54377RHF |
www.ti.com
VOUT
PH
Vin
TOPSIDE GROUND AREA
VIA to Ground Plane
ANALOG GROUND TRACE
EXPOSED
PowerPAD
AREA
COMPENSATION
NETWORK
OUTPUT INDUCTOR
OUTPUT
FILTER
CAPACITOR
BOOT
CAPACITOR
INPUT
BYPASS
CAPACITOR
INPUT
BULK
FILTER
FREQUENCY SET RESISTOR
SLOW START
CAPACITOR
BIAS CAPACITOR
A
BOOT
V
COMP
PWRGD
PH
PH
PH
PH
P
P
N
N
R
S
SS/ENA
VBIAS
VIN
VIN
VIN
P
P
PGND
PGND
TPS54377
SLVS779–SEPTEMBER 2007
The TPS54377 has two internal grounds (analog and
power). Inside the TPS54377, the analog ground ties
to all of the noise sensitive signals, while the power
ground ties to the noisier power signals. Noise
injected between the two grounds can degrade the
performance of the TPS54377, particularly at higher
output currents. Ground noise on an analog ground
plane can also cause problems with some of the
control and bias signals. For these reasons, separate
analog and power ground traces are recommended.
There should be an area of ground on the top layer
directly under the IC, with an exposed area for
connection to the PowerPAD. Use vias to connect
this ground area to any internal ground planes. Use
additional vias at the ground side of the input and
output filter capacitors as well. The AGND and PGND
pins should be tied to the PCB ground by connecting
them to the ground area under the device as shown.
The only components that should tie directly to the
power ground plane are the input capacitors, the
output
capacitors,
the
input
capacitor, and the PGND pins of the TPS54377. Use
a separate wide trace for the analog ground signal
path. This analog ground should be used for the
voltage set point divider, timing resistor RT, slow start
capacitor and bias capacitor grounds. Connect this
trace directly to AGND (pin 1).
The PH pins should be tied together and routed to
the output inductor. Since the PH connection is the
switching node, inductor should be located very close
to the PH pins and the area of the PCB conductor
minimized to prevent excessive capacitive coupling.
Connect the boot capacitor between the phase node
and the BOOT pin as shown. Keep the boot capacitor
close to the IC and minimize the conductor trace
lengths.
Connect the output filter capacitor(s) as shown
between the VOUT trace and PGND. It is important to
keep the loop formed by the PH pins, L
O
, C
O
and
PGND as small as practical.
Place the compensation components from the VOUT
trace to the VSENSE and COMP pins. Do not place
these components too close to the PH trace. Due to
the size of the IC package and the device pinout,
they must be routed close, but maintain as much
separation as possible while still keeping the layout
compact.
voltage
decoupling
Connect the bias capacitor from the VBIAS pin to
analog ground using the isolated analog ground
trace. The bias capacitor should be as close as
possible to the VBIAS pin and analog ground . If a
slow-start capacitor or RT resistor is used, or if the
SYNC pin is used to select 350-kHz operating
frequency, connect them to this trace.
Figure 11. TPS54377 PCB Layout
Copyright 2007, Texas Instruments Incorporated
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| TPS54377RHFR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.6 MHz 3-6V In 3A Syn. Stp Dwn SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| TPS54377RHFRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.6 MHz 3V-6V Input 3A Syn. Step Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| TPS54377RHFT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.6 MHz 3-6V In 3A Syn. Stp Dwn SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| TPS54377RHFTG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.6 MHz 3V-6V Input 3A Syn. Step Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(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 |
| TPS54380 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio |
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