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參數(shù)資料
| 型號(hào)： | RT9188-K8PB |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Dual, Ultra-Low Quiescent, 100mA CMOS LDO Regulator |
| 中文描述： | 雙路，超低靜態(tài)，100mA的LDO穩(wěn)壓器的CMOS |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 168K |
| 代理商： | RT9188-K8PB |
RT9188
Preliminary
9
DS9188-08 March 2007
www.richtek.com
Thermal Considerations
The RT9188 is a dual channel CMOS regulator designed
to provide two output voltage from one package. Each
output pin the RT9188 can deliver a current of up to
100mA over the full operating junction temperature range.
However, the maximum output current must be derated
at higher ambient temperature to ensure the junction
temperature does not exceed 125
°
C. With all possible
conditions, the junction temperature must be within the
range specified under operating conditions. Each
regulator contributes power dissipation to the overall
power dissipation of the package. Power dissipation can
be calculated based on the output current and the voltage
drop across each regulator.
P
D
= (V
DD
V
OUT1
) I
OUT1
+ (V
DD
V
OUT2
) I
OUT2
+ V
IN
I
GND
Each output is rated for 100mA of output current, but the
application may limit the amount of output current based
on the total power dissipation and the ambient
temperature. The final operating junction temperature for
any set of conditions can be estimated by the following
thermal equation:
P
D(MAX)
= ( T
J(MAX)
- T
A
) /
θ
JA
Where T
J (MAX)
is the maximum junction temperature of
the die (125
°
C) and T
A
is the maximum ambient
temperature. The junction to ambient thermal resistance
(
θ
JA
)
for SOT-23-5 package at recomm-ended minimum
footprint is 250
°
C/W (
θ
JA
is layout dependent). Visit our
website in which
“
Recommended Footprints for Soldering
Surface Mount Packages
”
for detail.
PCB Layout
Good board layout practices must be used or instability
can be induced because of ground loops and voltage
drops. The input and output capacitors
MUST
be directly
connected to the input, output, and ground pins of the
device using traces which have no other currents flowing
through them.
The best way to do this is to layout C
IN
and C
OUT
near
the device with short traces to the V
DD
, V
OUT
, and ground
pins.
The regulator ground pin should be connected to the
external circuit ground so that the regulator and its
capacitors have a
“
single point ground
”
.
It should be noted that stability problems have been seen
in applications where vias to an internal ground plane
were used at the ground points of the device and the
input and output capacitors. This was caused by varying
ground potentials at these nodes resulting from current
flowing through the ground plane. Using a single point
ground technique for the regulator and it's capacitors fixed
the problem. Since high current flows through the traces
going into V
IN
and coming from V
OUT
, Kelvin connect the
capacitor leads to these pins so there is no voltage drop
in series with the input and output capacitors.
Optimum performance can only be achieved when the
device is mounted on a PC board according to the
diagram below:
SOT-23-5 Board Layout
GND
VDD
VOUT1
VOUT2
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|---|---|
| RT9193-15GB | 功能描述:IC REG LDO 1.5V .3A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:2.5 V ~ 5.5 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:300mA（最小值） 電流 - 限制（最?。?360mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 供應(yīng)商設(shè)備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| RT9193-15GU5 | 功能描述:IC REG LDO 1.5V .3A SC70-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:2.5 V ~ 5.5 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:300mA（最小值） 電流 - 限制（最?。?360mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 供應(yīng)商設(shè)備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| RT9193-15PB | 制造商:Richtek Technology Corporation 功能描述: |
| RT9193-16GB | 功能描述:IC REG LDO 1.6V .3A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:2.5 V ~ 5.5 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:300mA（最小值） 電流 - 限制（最?。?360mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 供應(yīng)商設(shè)備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| RT9193-18GB | 功能描述:IC REG LDO 1.8V .3A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 其它有關(guān)文件:LM317M View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，可調(diào)式 輸出電壓:1.2 V ~ 37 V 輸入電壓:- 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最?。?500mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-252-3，DPak（2 引線+接片），SC-63 供應(yīng)商設(shè)備封裝:D-Pak 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1190 (CN2011-ZH PDF) 其它名稱:497-1574-1 |
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