- 您现在的位置：买卖IC网 > PDF目录385772 > RT9173CPSP (Richtek Technology Corporation) Cost-Effective, 2A Sink/Source Bus Termination Regulator PDF资料下载
参数资料
| 型号： | RT9173CPSP |
| 厂商： | Richtek Technology Corporation |
| 英文描述： | Cost-Effective, 2A Sink/Source Bus Termination Regulator |
| 中文描述： | 成本效益，甲汇/源总线终端稳压器 |
| 文件页数： | 10/13页 |
| 文件大小： | 235K |
| 代理商： | RT9173CPSP |
RT9173C
10
DS9173C-12 September 2007
www.richtek.com
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
R0
R9
R8
R7
R6
R5
R4
R3
R2
R1
R(2N)
R(2N+1)
RT9173C
RT9173C
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
= 3.3V
Figure 3
General Regulator
The RT9173C could also serves as a general linear
regulator. The RT9173C 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)
For sourcing 2A output applications, the RT9173C could
works with low-ESR ceramic capacitors as a general linear
regulator. It offers significant cost and space savings for
power applications, especially for hand-held wireless
devices and notebooks application. The recommended
input and output capacitors must be 10
μ
F or greater X7R/
X5R ceramic capacitors. The input and output capacitors
should be located as close as possible to the IC.
It
’
s not recommended for sinking application while using
ceramic capacitors. When the sinking function is used with
ceramic capacitors, the system may be unstable. If the
current sinking function is necessary for this regulator,
please refer to the RT9173C Typical Application Circuit as
shown on page 2 for component selection.
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 RT9173C 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
.
VCNTL
REFEN
GND
VIN
VOUT
RT9173C
V
EXT
R1
R2
V
OUT
相关PDF资料 |
PDF描述 |
|---|---|
| RT9173D | Cost-Effective, Peak 3A Sink/Source Bus Termination Regulator |
| RT9173DGSP | Cost-Effective, Peak 3A Sink/Source Bus Termination Regulator |
| RT9173DPSP | Cost-Effective, Peak 3A Sink/Source Bus Termination Regulator |
| RT9182EGES | Dual, Low-Noise, 200mA LDO Regulator |
| RT9182EPES | Dual, Low-Noise, 200mA LDO Regulator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RT9173DGSP | 功能描述:IC REG BUS TERMINATION 3A 8SOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| 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: |
发布紧急采购，3分钟左右您将得到回复。