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參數(shù)資料
| 型號： | AAT3218IJS-1.25-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 150mA MicroPower⑩ High Performance LDO |
| 中文描述： | 150mA的微功耗高性能的LDO⑩ |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 384K |
| 代理商： | AAT3218IJS-1.25-T1 |
AAT3218
150mA MicroPower High Performance LDO
8
3218.2006.04.1.8
Functional Description
The AAT3218 is intended for LDO regulator appli-
cations where output current load requirements
range from no load to 150mA. The advanced cir-
cuit design of the AAT3218 has been specifically
optimized for very fast start-up and shutdown tim-
ing. This proprietary CMOS LDO has also been
tailored for superior transient response characteris-
tics. These traits are particularly important for
applications that require fast power supply timing,
such as GSM cellular telephone handsets.
The high-speed turn-on capability of the AAT3218
is enabled through the implementation of a fast-
start control circuit, which accelerates the power-
up behavior of fundamental control and feedback
circuits within the LDO regulator.
Fast turn-off response time is achieved by an
active output pull-down circuit, which is enabled
when the LDO regulator is placed in shutdown
mode. This active fast shutdown circuit has no
adverse effect on normal device operation.
The AAT3218 has very fast transient response
characteristics, which is an important feature for
applications where fast line and load transient
response are required. This rapid transient
response behavior is accomplished through the
implementation of an active error amplifier feed-
back control. This proprietary circuit design is
unique to this MicroPower LDO regulator.
The LDO regulator output has been specifically
optimized to function with low-cost, low-ESR
ceramic capacitors. However, the design will allow
for operation over a wide range of capacitor types.
A bypass pin has been provided to allow the addi-
tion of an optional voltage reference bypass
capacitor to reduce output self noise and increase
power supply ripple rejection. Device self noise
and PSRR will be improved by the addition of a
small ceramic capacitor to this pin. However,
increased C
BYPASS
values may slow down the LDO
regulator turn-on time.
This LDO regulator has complete short-circuit and
thermal protection. The integral combination of
these two internal protection circuits gives the
AAT3218 a comprehensive safety system to guard
against extreme adverse operating conditions.
Device power dissipation is limited to the package
type and thermal dissipation properties. Refer to
the Thermal Considerations section of this
datasheet for details on device operation at maxi-
mum output current loads.
Functional Block Diagram
Error
Amplifier
Over-Current
Protection
Over-
Temperature
Protection
Voltage
Reference
+
-
IN
EN
BYP
OUT
GND
Active
Feedback
Control
Fast-
Start
Control
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3218IJS-2.0-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IJS-2.3-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IJS-2.5-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IJS-2.6-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IJS-2.7-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
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