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參數(shù)資料
| 型號： | AME8841IEHA |
| 廠商： | AME, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 600mA CMOS LDO |
| 中文描述： | 600毫安的CMOS LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 79K |
| 代理商： | AME8841IEHA |
Analog Microelectronics, Inc.
5
AME8841
600mA CMOS LDO
n
Detailed Description
The AME8841 family of CMOS regulators contain a
PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
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 600mA. During thermal
shutdown, the output voltage remains low. Normal op-
eration is restored when the junction temperature drops
below 110
o
C.
The AME8841 switches from voltage mode to current mode
when the load exceeds the rated output current. This
prevents over-stress. The AME8841 also incorporates
current foldback to reduce power dissipation 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.
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External Capacitors
The AME8841 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 comparatively expen-
sive. One option is to parallel a 0.1
μ
F ceramic capacitor
with a 10
μ
F Aluminum Electrolytic. The benefit is low
ESR, high capacitance, and low overall cost.
A second capacitor is recommended between the input
and ground to stabilize Vin. 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.
n
Enable
The Enable pin normally floats high. When actively,
pulled low, the PMOS pass transistor shuts off, and all
internal circuits are powered down. In this state, the
quiescent current is less than 1
μ
A. This pin behaves
much like an electronic switch.
相關PDF資料 |
PDF描述 |
|---|---|
| AME8841KEHA | 600mA CMOS LDO |
| AME8841OEHA | Safety Sign; Legend:Caution Do Not Enter; External Height:10"; External Width:14"; Body Material:Aluminum; Color:Yellow/Black RoHS Compliant: NA |
| AME8841REHA | 600mA CMOS LDO |
| AME8841CEHA | 600mA CMOS LDO |
| AME8841LEHA | 600mA CMOS LDO |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AME8853-AET330 | 制造商:AME 功能描述:High PSRR 60dB LDO,IQ 60 uA,300mA ,FIX 3.3V,SOT23,3K/REEL |
| AME8855-AET330 | 制造商:AME 功能描述:600mA,FIX 3.3V,SOT23,60dB,IN G O,3K/REEL |
| AME8855-AGT250 | 制造商:AME 功能描述:PSRR 60dB LDO,IQ 60 uA,600mA ,FIX 2.5V,SOT223,IGO,2.5K/Reel |
| AME8855-BET330 | 制造商:AME 功能描述:600mA,FIX 3.3V,SOT23,60dB,G O IN ,3K/REEL |
| AME8855-BGT250 | 制造商:AME 功能描述:PSRR 60dB LDO,IQ 60 uA,600mA ,FIX 2.5V,SOT223,GOI,2.5K/Reel |
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