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参数资料
| 型号： | RT9173DGSP |
| 厂商： | Richtek Technology Corporation |
| 英文描述： | Cost-Effective, Peak 3A Sink/Source Bus Termination Regulator |
| 中文描述： | 成本效益，峰值3A条接收器/源总线终端稳压器 |
| 文件页数： | 10/13页 |
| 文件大小： | 233K |
| 代理商： | RT9173DGSP |
RT9173D
10
DS9173D-05 September 2007
www.richtek.com
General Regulator
The RT9173D could also serves as a general linear
regulator. The RT9173D accepts an external reference
voltage at REFEN pin and provides output voltage regulated
to this reference voltage as shown i
n Figure 3, where
V
OUT
= V
EXT
x R2/(R1+R2)
As other linear regulator, dropout voltage and thermal issue
should be special
ly considered. Figure 4 and 5 show the
R
DS(ON)
over temperature of RT9173D in PSOP-8 (Ex
posed
Pad) package. 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
.
Application Information
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.
Distributed Bus Terminating Topology
Figure 2
Figure 4
Figure 5
R0
R9
R8
R7
R6
R5
R4
R3
R2
R1
R(2N)
R(2N+1)
RT9173D
RT9173D
VOUT
VOUT
REFEN
BUS(0)
BUS(1)
BUS(2)
BUS(3)
BUS(4)
BUS(5)
BUS(6)
BUS(7)
BUS(8)
BUS(9)
BUS(2N)
BUS(2N+1)
Terminator Resistor
R
DS(ON)
vs. Temperature
0.10
0.15
0.20
0.25
0.30
0.35
0.40
-50
-25
0
25
50
75
100
125
Temperature
R
D
(
)
(
°
C)
V
CNTL
= 5V
R
DS(ON)
vs. Temperature
0.10
0.15
0.20
0.25
0.30
0.35
0.40
-50
-25
0
25
50
75
100
125
Temperature
R
D
)
(
°
C)
V
CNTL
= 3.3V
Figure 3
VCNTL
REFEN
GND
VIN
VOUT
RT9173D
V
EXT
R1
R2
V
OUT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RT9173GS | 功能描述:IC REG BUS TERMINATION 1.5A 8SOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装: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 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| RT9174PS | 制造商:Richtek Technology Corporation 功能描述: |
| RT9178-25GB | 功能描述:IC REG LDO 2.5V .2A SOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.1V 输入电压:最高 7.5V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:5A（最小值） 电流 - 限制（最小）:5.1A 工作温度:-40°C ~ 100°C 安装类型:通孔 封装/外壳:TO-220-5 供应商设备封装:TO-220-5 包装:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名称:296-15154-5 |
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