參數(shù)資料
型號(hào)： TPS5211
廠商： Texas Instruments, Inc.
英文描述： HIGH FREQUENCY PROGRAMMABLE HYSTERETIC REGULATOR CONTROLLER
中文描述： 可編程滯高頻穩(wěn)壓控制器
文件頁(yè)數(shù)： 30/32頁(yè)
文件大小： 469K
代理商： TPS5211
TPS5211
HIGH FREQUENCY PROGRAMMABLE HYSTERETIC
REGULATOR CONTROLLER
SLVS243 – SEPTEMBER 1999
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
layout guidelines
Good power supply results will only occur when care is given to proper design and layout. Layout will affect noise
pickup and generation and can cause a good design to perform with less than expected results. With a range
of currents from milliamps to tens or even hundreds of amps, good power supply layout is much more difficult
than most general PCB design. The general design should proceed from the switching node to the output, then
back to the driver section, and, finally, to placing the low-level components. Below are several specific points
to consider beforelayout of a TPS5211 design begins.
1.
All sensitive analog components should be referenced to ANAGND. These include components connected
to SLOWST, DROOP, IOUT, OCP, VSENSE, VREFB, VHYST, BIAS, and LOHIB.
2.
Analog ground and drive ground should be isolated as much as possible. Ideally, analog ground will connect
to the ground side of the bulk storage capacitors on V
O
, and drive ground will connect to the main ground
plane close to the source of the low-side FET.
3.
Connections from the drivers to the gate of the power FETs, should be as short and wide as possible to
reduce stray inductance. This becomes more critical if external gate resistors are not being used.
4.
The bypass capacitor for the DRV regulator should be placed close to the TPS5210 and be connected to
DRVGND.
5.
The bypass capacitor for V
CC
should be placed close to the TPS5210 and be connected to DRVGND.
When configuring the high-side driver as a floating driver, the connection from BOOTLO to the power FETs
should be as short and as wide as possible. The other pins that also connect to the power FETs, LOHIB
and LOSENSE, should have a separate connection to the FETS since BOOTLO will have large peak
currents flowing through it.
6.
7.
When configuring the high-side driver as a floating driver, the bootstrap capacitor (connected from BOOT
to BOOTLO) should be placed close to the TPS5210.
8.
When configuring the high-side driver as a ground-referenced driver, BOOTLO should be connected to
DRVGND.
9.
The bulk storage capacitors across V
I
should be placed close to the power FETS. High-frequency bypass
capacitors should be placed in parallel with the bulk capacitors and connected close to the drain of the
high-side FET and to the source of the low-side FET.
10. High-frequency bypass capacitors should be placed across the bulk storage capacitors on V
O
.
11. HISENSE and LOSENSE should be connected very close to the drain and source, respectively, of the
high-side FET. HISENSE and LOSENSE should be routed very close to each other to minimize
differential-mode noise coupling to these traces. Ceramic decoupling capacitors should be placed close to
where HISENSE connects to Vin, to reduce high-frequency noise coupling on HISENSE.
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TPS5211PWPR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
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TPS5300 制造商:TI 制造商全稱:Texas Instruments 功能描述:MOBILE CPU POWER SUPPLY CONTROLLER
TPS5300DAP 功能描述:DC/DC 開關(guān)控制器 Mobile CPU DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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