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參數(shù)資料
| 型號(hào)： | US3018 |
| 廠商： | Unisem Group |
| 英文描述： | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD |
| 中文描述： | 5位可編程同步降壓普樂士LDO控制器和200mA LDO的船上 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大?。?/td> | 108K |
| 代理商： | US3018 |
US3018
4-15
Rev. 1.4
12/8/00
8) Place the 2.5V output capacitor, C18 close to the
pin13 of the IC and the 1.5V output capacitor, C17 close
to the Q2 MOSFET. Note: It is better to place the
1.5V linear regulator components close to the 3018 and
then run a trace from the output of the regulator to the
load. However, if this is not possible then the trace from
the linear drive output pin, pin 16
must be run away
from any high frequency data signals.
It is critical, to place high frequency ceramic ca-
pacitors close to the clock chip and termination
resistors to provide local bypassing.
9) Place R12 and C10 close to pin 20.
10) Place C9 close to pin 9.
Component connections:
Note : It is extremely important that no data bus
should be passing through the switching regulator
section specifically close to the fast transition nodes
such as PWM drives or the inductor voltage.
Using the 4 layer board, dedicate on layer to GND, an-
other layer as the power layer for the 5V, 3.3V, Vcore,
1.5V and if it is possible for the 2.5V.
Connect all grounds to the ground plane using di-
rect vias to the ground plane.
Use large low inductance/low impedance plane to con-
nect the following connections either using component
side or the solder side.
a) C14 to Q3 Drain
b) Q3 Source to Q4 Drain
c) Q4 drain to L3
d) L3 to the output capacitors, C16
e) C16 to the load, slot 1
f) Input filter L1 to the C16 and C3
g) C1 to Q2 drain
h) C17 to the Q2 source
I) A minimum of 0.2 inch width trace from the C18 ca-
pacitor to pin 13
Connect the rest of the components using the shortest
connection possible
相關(guān)PDF資料 |
PDF描述 |
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| US3018CW | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD |
| US3021B | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021BCW | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021M | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021MCW | 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| US3018CW | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD |
| US3021B | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021BCW | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021M | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
| US3021MCW | 制造商:UNISEM 制造商全稱:UNISEM 功能描述:5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS TRIPPLE LDO CONTROLLER |
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