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參數(shù)資料
| 型號(hào)： | AAT4280 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | Slew Rate Controlled Load Switch |
| 中文描述： | 擺率控制的負(fù)荷開關(guān) |
| 文件頁數(shù)： | 9/14頁 |
| 文件大小： | 423K |
| 代理商： | AAT4280 |
Functional Description
The AAT4280 is a family of flexible P-channel
MOSFET power switches designed for high-side
load-switching applications. There are three ver-
sions of AAT4280 with different turn-on and turn-off
characteristics to choose from, depending upon the
specific requirements of an application. The first
AAT4280-1 version has a moderate turn on slew
rate feature, which reduces in-rush current when
the MOSFET is turned on. This function allows the
load switch to be implemented with a small input
capacitor, or no input capacitor at all. During turn
on slewing, the current ramps linearly until it reach-
es the level required for the output load condition.
The proprietary turn on current control method
works by careful control and monitoring of the
MOSFET gate voltage. When the device is
switched ON, the gate voltage is quickly increased
to the threshold level of the MOSFET. Once at this
level, the current begins to slew as the gate voltage
is slowly increased until the MOSFET becomes
fully enhanced. Once it has reached this point, the
gate is quickly increased to the full input voltage
and R
DS(ON)
is minimized. The second device ver-
sion, the AAT4280-2 is a very fast switch intended
for high speed switching applications. This version
has no turn on slew rate control and no special out-
put discharge features. The final switch version,
the AAT4280-3 has the addition of a minimized
slew rate limited turn on function and a shutdown
output discharge circuit to rapidly turn off a load
when the load switch is disabled through the
ON/OFF pin.
All versions of the AAT4280 operate with input volt-
ages ranging from 1.8V to 5.5V. All versions of this
device have extremely low operating current, mak-
ing them ideal for battery-powered applications. In
cases where the input voltage drops below 1.8V,
the AAT4280 MOSFET device is protected from
entering into the saturation region of operation by
automatically shutting down through an under volt-
age lockout control circuit. The ON/OFF control pin
is TTL compatible and will also function with 2.5
volt to 5 volt logic systems, making the AAT4280 an
ideal level shifting load-switch.
AAT4280
Slew Rate Controlled Load Switch
4280.2002.2.0.92
9
Functional Block Diagram
Under
Voltage
Lockout
Level
Shift
IN
ON/OFF
OUT
GND
Turn-On
Slew Rate
Control
*
*AAT4280-3 only
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT4280-1 | Slew Rate Controlled Load Switch |
| AAT4280-2 | RAC30-SA(-E)(-ST) Series - Powerline Regulated AC-DC Converters; Output Voltage (Vdc): 15V; Features: AC-DC Power Supply; 30 Watt PCB Mount Package; Universal Input Voltage Range; 3000VAC Isolation; Low Output Ripple and Noise; Short Circuit Protected; UL Certified |
| AAT4280-3 | Slew Rate Controlled Load Switch |
| AAT4280IJS-3-T1 | Slew Rate Controlled Load Switch |
| AAT4280IGU-2-T1 | Slew Rate Controlled Load Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT4280_06 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Slew Rate Controlled Load Switch |
| AAT4280-1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Slew Rate Controlled Load Switch |
| AAT4280-2 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Slew Rate Controlled Load Switch |
| AAT4280-3 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Slew Rate Controlled Load Switch |
| AAT4280A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Slew Rate Controlled Load Switch |
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