參數(shù)資料
型號(hào)： RT9173BPS
廠商： Richtek Technology Corporation
英文描述： 2A Bus Termination Regulator
中文描述： 甲總線終端穩(wěn)壓器
文件頁(yè)數(shù)： 10/13頁(yè)
文件大?。?/td> 273K
代理商： RT9173BPS
RT9173B
10
DS9173B-09 March 2007
www.richtek.com
General Regulator
The RT9173B could also serves as a general linear
regulator. The RT9173B accepts an external reference
voltage at REFEN pin and provides output voltage regulated
to this reference voltage as shown in Figure 6, where
V
OUT
= V
REF
x R1/(R1+R2)
R
DS(ON)
vs. Temperature
0.23
0.25
0.27
0.29
0.31
0.33
0.35
0.37
0.39
0.41
0.43
0.45
-50
-25
0
25
50
75
100
125
Temperature
R
D
)
(
°
C)
SOP-8
V
CNTL
= 3.3V
Internal parasitic diode
Avoid forward-bias internal parasitic diode, V
OUT
to V
CNTL
,
and V
OUT
to V
IN
, the V
OUT
should not be forced some
voltage respect to ground on this pin while the V
CNTL
or
V
IN
is disappeared.
Consideration while designs the resistance of voltage
divider
Make sure the sinking current capability of pull-down NMOS
if the lower resistance was chosen so that the voltage on
V
REFEN
is below 0.2V.
In addition, the capacitor and voltage divider form the low-
pass filter. There are two reasons doing this design; one is
for output voltage soft-start while another is for noise
immunity.
How to reduce power dissipation on Notebook PC or
the dual channel DDR SDRAM application
In notebook application, using RichTek
’
s Patent
“
D
istributed Bus Terminator Topology
”
with choosing
RichTek
’
s product is encouraged.
VCNTL
REFEN
GND
VIN
VOUT
RT9173B
V
REFEN
R1
R2
Make sure that V
CNTL
>= V
IN
in all conditions including
power on and off. As other linear regulator, dropout voltage
and thermal issue should be specially considered. Figure
6 and 7 show the R
DS(ON)
over temperature of RT9173B in
SOP-8 and TO-252 packages respectively. The minimum
dropout voltage could be obtained by the product of R
DS(ON)
and output current. For thermal consideration, please refer
to the relative sections.
R
DS(ON)
vs. Temperature
0.24
0.27
0.30
0.33
0.36
0.39
0.42
0.45
0.48
-50
-25
0
Temperature
25
50
(
°
C)
75
100
125
R
D
)
TO-252
V
CNTL
= 3.3V
Application Information
Distributed Bus Terminating Topology
Terminator Resistor
R0
R9
R8
R7
R6
R5
R4
R3
R2
R1
RN
R(N+1)
RT9173B
RT9173B
VOUT
VOUT
REFEN
BUS(0)
BUS(1)
BUS(2)
BUS(3)
BUS(4)
BUS(5)
BUS(6)
BUS(7)
BUS(8)
BUS(9)
BUS(N)
BUS(N+1)
Figure 6
相關(guān)PDF資料
PDF描述
RT9174GS Triple Linear Regulator Controllers
RT9174PS Triple Linear Regulator Controllers
RT9176 5.0 AMP POSITIVE VOLTAGE REGULATOR
RT9176-15GG 5.0 AMP POSITIVE VOLTAGE REGULATOR
RT9176-15GL 5.0 AMP POSITIVE VOLTAGE REGULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RT9173CGSP 功能描述:IC REG BUS TERMINATION 2A 8SOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR)
RT9173DGSP 功能描述:IC REG BUS TERMINATION 3A 8SOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR)
RT9173GS 功能描述:IC REG BUS TERMINATION 1.5A 8SOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
RT9173PS 制造商:RICHTEK 功能描述:REGULATOR
RT9174GS 功能描述:IC REG CTRLR TRPL POS ADJ 8SOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性晶體管驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:正，固定式 輸出數(shù):2 輸出電壓:2.8V，3.3V 電流 - 電源:12mA 輸入電壓:5 V ~ 22 V 工作溫度:0°C ~ 70°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*