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參數(shù)資料
| 型號： | RT9194 |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Low-Dropout Linear Regulator Controller with PGOOD Indication |
| 中文描述： | 低壓差線性穩(wěn)壓器控制器PGOOD指示 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 232K |
| 代理商： | RT9194 |
RT9194
9
DS9194-08 March 2007
www.richtek.com
Figure 3
Figure 6
Layout Considerations
There are three critical layout considerations. One is the divider resistors should be located to RT9194 as possible to
avoid inducing any noise. The second is capacitors place. The C
IN
and C
OUT
have to put at near the NMOS for improve
performance. The third is the copper area for pass element. We have to consider when the pass element operating
under high power situation that could rise the junction temperature. In addition to the package thermal resistance limit,
we could add the copper area to improve the power dissipation. As show in Figure 5 and Figure 6.
Figure 5
PNP Transistor Selection
The RT9194 could driver the PNP transistor to sink output current. PNP transistor selection criteria include DC current
gain h
FE
, threshold voltage V
EB
, collector-emitter voltage V
CE
, maximum continues collector current I
C
, package thermal
resistance
θ
(JA).
For example, the PNP transistor operates sink current up to 0.5A when the input voltage is 1.5V and set the output
voltage is 1.2V. As show in Figure 3. A KSB772 PNP transistor, the V
CE
= 1.2V, V
BE
= -1V, I
C
= 0.5A, I
B
= 0.5/160
]
3.125mA, when the DRI pin voltage is 0.2V could sink 6.8mA
(MAX)
is a close match.
Sink Current vs. DRI Voltage
0
5
10
15
20
25
0
0.5
1
DRI Voltage (V)
1.5
2
2.5
3
S
T
A
= 25
°
C
Figure 4
V
IN
V
CC
EN
PGOOD
FB
V
OUT
GND
GND
+
+
+
V
CC
V
IN
PGOOD
V
OUT
C
OUT
C
IN
Ccc
R
PGOOD
R1
R2
Q1
VCC
GND
EN
DRI
PGOOD
FB
RT9194
Chip Enable
Q2
V
CC
V
IN
PGOOD
V
OUT
C
OUT
C
IN
Ccc
R
PGOOD
R1
R2
Q1
VCC
GND
EN
DRI
PGOOD
FB
RT9194
Chip Enable
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PDF描述 |
|---|---|
| RT9194GE | Low-Dropout Linear Regulator Controller with PGOOD Indication |
| RT9194PE | Low-Dropout Linear Regulator Controller with PGOOD Indication |
| RT9198A-15GB | 300mA, Low Noise, Ultra-Fast CMOS LDO Regulator |
| RT9198-15GQW | 300mA, Low Noise, Ultra-Fast CMOS LDO Regulator |
| RT9198-15GU5 | 300mA, Low Noise, Ultra-Fast CMOS LDO Regulator |
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|---|---|
| RT9194GE | 功能描述:IC REG CTRLR SGL POS ADJ SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性晶體管驅(qū)動器 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) |
| RT9194PE | 制造商:Richtek 功能描述:LDO |
| RT9198-15GBG | 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:1 系列:anyCAP® 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.23V @ 1.5A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:1.5A 電流 - 限制（最?。?- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-261-4，TO-261AA 供應(yīng)商設(shè)備封裝:SOT-223-3 包裝:Digi-Reel® 其它名稱:ADP3339AKCZ-3.3-RLDKR |
| RT9198-15GBR | 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:1 系列:anyCAP® 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.23V @ 1.5A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:1.5A 電流 - 限制（最?。?- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-261-4，TO-261AA 供應(yīng)商設(shè)備封裝:SOT-223-3 包裝:Digi-Reel® 其它名稱:ADP3339AKCZ-3.3-RLDKR |
| RT9198-15GU5 | 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:1 系列:anyCAP® 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.23V @ 1.5A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:1.5A 電流 - 限制（最?。?- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-261-4，TO-261AA 供應(yīng)商設(shè)備封裝:SOT-223-3 包裝:Digi-Reel® 其它名稱:ADP3339AKCZ-3.3-RLDKR |
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