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參數(shù)資料
| 型號： | AME8811OEFT |
| 廠商： | AME, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 300mA CMOS LDO |
| 中文描述： | 300mA的CMOS低壓 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 132K |
| 代理商： | AME8811OEFT |
AME, Inc.
13
AME8800 / 8811
300mA CMOS LDO
n
Detailed Description
The AME8800/8811 family of CMOS regulators con-
tain a PMOS pass transistor, voltage reference, error
amplifier, over-current protection, and thermal shut-
down.
The P-channel pass transistor receives data from the
error amplifier, over-current shutdown, and thermal pro-
tection circuits. During normal operation, the error am-
plifier compares the output voltage to a precision refer-
ence. Over-current and Thermal shutdown circuits be-
come active when the junction temperature exceeds
150
o
C, or the current exceeds 300mA. During thermal
shutdown, the output voltage remains low. Normal op-
eration is restored when the junction temperature drops
below 120
o
C.
The AME8800/8811 switches from voltage mode to cur-
rent mode when the load exceeds the rated output cur-
rent. This prevents over-stress. The AME8800/8811
also incorporates current foldback to reduce power dis-
sipation when the output is short circuited. This feature
becomes active when the output drops below 0.8 volts,
and reduces the current flow by 65%. Full current is
restored when the voltage exceeds 0.8 volts.
n
External Capacitors
The AME8800/8811 is stable with an output capacitor
to ground of 2.2
μ
F or greater. Ceramic capacitors have
the lowest ESR, and will offer the best AC performance.
Conversely, Aluminum Electrolytic capacitors exhibit
the highest ESR, resulting in the poorest AC response.
Unfortunately, large value ceramic capacitors are com-
paratively expensive. One option is to parallel a 0.1uF
ceramic capacitor with a 10uF Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low over-
all cost.
A second capacitor is recommended between the input
and ground to stabilize V
IN
. The input capacitor should
be at least 0.1
μ
F to have a beneficial effect.
All capacitors should be placed in close proximity to
the pins. A "Quiet" ground termination is desirable.
This can be achieved with a "Star" connection.
相關(guān)PDF資料 |
PDF描述 |
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| AME8800GEET | 300mA CMOS LDO |
| AME8800GEEV | 300mA CMOS LDO |
| AME8800IEET | 300mA CMOS LDO |
| AME8800KEAT | CAPACITOR, BESTCAP 33 MILLI FARAD 9V CAPACITOR, BESTCAP 33 MILLI FARAD 9V; CAPACITANCE:33MF; VOLTAGE RATING, DC:9V; CAPACITOR DIELECTRIC TYPE:ELECTRONIC; SERIES:BESTCAP; TEMP, OP. MAX:75(DEGREE C); TEMP, OP. MIN:-20(DEGREE C); RoHS Compliant: Yes |
| AME8800KEET | CAPACITOR, BESTCAP 22 MILLI FARAD 12VCAPACITOR, BESTCAP 22 MILLI FARAD 12V; Capacitance:22mF; Voltage rating, DC:12V; Capacitor dielectric type:Electronic; Series:BestCap; Temp, op. max:75(degree C); Temp, op. min:-20(degree C); |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AME8812MEEVZ | 制造商:Analog Microelectronic Inc (AME) 功能描述:AME8812 Series 1.8 V 300 mA CMOS Low Dropout Regulator - SOT-25 制造商:AME 功能描述:AME8812 Series 1.8 V 300 mA CMOS Low Dropout Regulator - SOT-25 |
| AME8815AECS500 | 制造商:MISCELLANEOUS 功能描述: |
| AME8815AEGT250 | 制造商:AME 功能描述:_ |
| AME8818AEET330Z | 制造商:AME 功能描述:AME8818AEET330Z 300mA 3.3V Low Dropout CMOS Regulator / GOI |
| AME8819AEFT150Z | 制造商:AME 功能描述:600mA CMOS LDO SOT89 FIX 1.5V 1K/REEL |
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