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參數(shù)資料
| 型號： | AAT4650IHS-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 5V/3V PC Card Power Switch |
| 中文描述： | 5V/3V PC卡電源開關(guān) |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 428K |
| 代理商： | AAT4650IHS-T1 |
Functional Description
The AAT4650 is a single channel power switch that
can be used in any application where dual power
supply multiplexing is required. Typical applications
for this include PC card applications not requiring a
12 volt power supply, or applications where power is
switched, for example, between 5 volts for operation
and 3.3 volts for standby mode. The AAT4650 oper-
ates with input voltages ranging from 2.7 to 5.5 volts
in any combination and automatically powers its
internal circuitry off of whichever input voltage is
higher. Two identical low R
DS
P-channel MOSFETS
serve as the power multiplexing circuit with a com-
mon drain as the Vcc output and independent
sources as the two Vcc3 and Vcc5 inputs. A two bit
parallel interface determines the state of the multi-
plexer: Vcc=Vcc3, Vcc=Vcc5, Vcc with resistive pull
down to ground, or Vcc hi-impedance. When the
state is set to either of the two inputs, the multiplex-
ing circuit will slowly slew the V
CC
output to the new
voltage level which protects the upstream power
supply from sudden load transients. When the
resistive pull down is chosen for V
CC
, the V
CC
output
is quickly discharged by the resistive pull down.
The AAT4650 always serves as an electronic fuse
by limiting the load current if it exceeds the current
limit threshold. During power up into a short, the
current will gradually increase until the current limit
is reached. During a sudden short circuit on the out-
put, the current limit will respond in 1 μs to isolate
and protect the upstream power supply from the
load short circuit. In most applications, because the
response time is so fast, a short circuit to V
CC
will
not affect the upstream supply, so system function-
ality will not be affected. In the case of an over cur-
rent condition, an open drain FAULT flag output will
signal the event. The FAULT output is also active
during output voltage slew, and becomes inactive
once the output is within regulation.
AAT4650
5V/3V PC Card Power Switch
4650.2001.
10
.0.9
3
7
Functional Block Diagram
Body Ctl
5K
V
CC
3
V
CC
5
V
CC
CTL0
CTL1
FAULT
GND
Over
Temperature
Over
Current
Over
Current
Control
Logic
Slew
Rate
Slew
Rate
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT4650 | 5V/3V PC Card Power Switch |
| AAT4650IHS-B1 | 5V/3V PC Card Power Switch |
| AAT4670IAS-T1 | Dual-Input, Dual-Output Load Switches |
| AAT4670IHS-T1 | Dual-Input, Dual-Output Load Switches |
| AAT4670 | Dual-Input, Dual-Output Load Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT4651 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:5V/3V PC Card Power Switch |
| AAT4651IAS-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:5V/3V PC Card Power Switch |
| AAT4651IHS-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:5V/3V PC Card Power Switch |
| AAT4670 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Dual-Input, Dual-Output Load Switches |
| AAT4670_06 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Dual-Input, Dual-Output Load Switch |
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