參數(shù)資料
型號： MAX1816ETM
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Replaced by TMS320VC5506 : Digital Signal Processors 144-LQFP
中文描述： DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CQCC48
封裝： 7 X 7 MM, 0.80 MM HEIGHT, THIN, QFN-48
文件頁數(shù)： 47/49頁
文件大小： 983K
代理商： MAX1816ETM
M
Dual Step-Down Controllers Plus Linear-
Regulator Controller for Notebook Computers
______________________________________________________________________________________
47
Layout Procedure
1) Place the power components first, with ground ter-
minals adjacent (low-side MOSFET sources, C
IN_
,
C
OUT
_, D1/D2 anodes). If possible, make all these
connections on the top layer with wide, copper-
filled areas.
2) Mount the controller IC adjacent to the low-side MOS-
FET, preferably on the backside in order to keep LX_,
PGND_, and the DL_ drive lines short and wide. The
DL_ gate traces must be short and wide, measuring
10 to 20 squares (50 mils to 100 mils wide if the
MOSFET is 1in from the controller IC).
3) Group the gate-drive components (BST_ diodes
and capacitors, V
DD
bypass capacitor) together
near the controller IC.
4) Make the MAX1816/MAX1994 controllers
’
ground
connections as shown in Figure 13. This diagram
can be viewed as having three separate ground
planes: input/output ground, where all the high-
power components go; the power ground plane,
where the PGND pin and V
DD
bypass capacitors
go; and an analog ground plane where sensitive
analog components go. The analog ground plane
and power ground plane must meet only at a single
point close to the IC. These two planes are then
connected to the high-power output ground with a
short connection from PGND to the source of the
low-side MOSFET (the middle of the star ground).
This point must also be very close to the output
capacitor ground terminal.
5) Connect the output power planes (V
CORE
and sys-
tem ground planes) directly to the output filter
capacitor positive and negative terminals with multi-
ple vias. Place the entire DC-DC converter circuit
as close to the CPU as is practical.
Chip Information
TRANSISTOR COUNT: 13,313
Figure 13. Power-Stage PC Board Layout Example
POWER GROUND
BOTTOM LAYER
POWER GROUND
TOP LAYER
INPUT (V+)
L1
L2
C
OUT1
C
OUT1
C
OUT1
C
OUT1
C
OUT2
C
OUT2
C
IN
C
IN
C
IN
C
IN
C
IN
C
IN
V
OUT2
V
OUT1
POWER GROUND
VIA TO POWER GROUND
ANALOG
GROUND
MAX1816
MAX1994
LX1
LX2
LX1
LX2
V
DD
CAP
V
CC
CAP
REF CAP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1816ETM+ 功能描述:DC/DC 開關(guān)控制器 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
MAX1816ETM+T 功能描述:DC/DC 開關(guān)控制器 NULL 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
MAX1816ETM-T 功能描述:DC/DC 開關(guān)控制器 NULL 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
MAX1816XR31+ 制造商:Maxim Integrated Products 功能描述:
MAX1817EUB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual-Output Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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