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AAT4625IAS-T1

更新时间： 2024-01-20 13:41:45
品牌 Logo 应用领域
AAT 开关电源开关
页数 文件大小 规格书
15页 396K
描述
USB Single-Channel Power Switch

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AAT4625IAS-T1 技术参数

生命周期：Active零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：unknown风险等级：5.43
内置保护：TRANSIENT; OVER CURRENT; THERMAL; UNDER VOLTAGE接口集成电路类型：BUFFER OR INVERTER BASED PERIPHERAL DRIVER
JESD-30 代码：R-PDSO-G8长度：4.9 mm
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
输出电流流向：SOURCE标称输出峰值电流：1.5 A
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
座面最大高度：1.75 mm最大供电电压：5.5 V
最小供电电压：2.7 V标称供电电压：5 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL断开时间：20 µs
宽度：3.9 mmBase Number Matches：1

AAT4625IAS-T1 数据手册

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AAT4625  
USB Single-Channel Power Switch  
input power supply to drop below the AAT4625's  
under-voltage lockout threshold. This drop in voltage  
would cause the AAT4625 to turn off until the input  
power supply voltage level recovers. Since this cycle  
would be self-perpetuating, the entire circuit could be  
seen to be unstable. In the very rare case where  
capacitor cost is prohibitive and the input capacitor is  
omitted, the output load circuit should be slew rate  
limited when turned on.  
datasheet. When the AAT4625 is in the off state, the  
output is an open circuit and the device quiescent  
current consumption is reduced to less than 1µA.  
The EN threshold voltage is set to allow the  
AAT4625 to be controlled by 5V TTL levels, as well  
as CMOS-compatible levels ranging from 2.5V to 5V.  
The EN function control voltage level should not  
exceed the input supply level applied to the IN pin.  
Fault Flag Output  
Output Capacitor  
The AAT4625 features an active low fault flag out-  
put. The fault flag is provided to alert the system  
if the over-current or over-temperature circuits  
become active or if the load switch is not receiv-  
ing a sufficient voltage level to properly operate.  
If either the current limit or over-temperature cir-  
cuits in any combination are constantly active for  
more than approximately 10ms, the FAULT pin is  
pulled to ground internally through an open drain  
device. The 10ms delay on the FAULT function is  
intended to prevent capacitive loads connected to  
the load switch output from activating the FAULT  
flag when the device is turned on. The placement  
of a pull-up resistor between the FAULT pin and  
the IN pin is recommended. Reasonable values  
for the pull-up resistor should range from 10kΩ to  
100kΩ. Since the FAULT flag is an open drain ter-  
minal, it may be pulled up to any voltage that is  
not greater than the level present on the IN pin.  
This is done to allow the AAT4625 to signal ancil-  
lary circuitry that is powered by voltage levels less  
than the level on the IN pin.  
In order to insure stability while the device current  
limit is active, a small capacitance of approximately  
1µF should be used. When the AAT4625 is activat-  
ed using the ON function, there are no momentary  
current transients, as in the case when a short cir-  
cuit is suddenly applied to a device that is already  
on. Refer to the "Turn-On/Off Response" charac-  
teristics curve. Regardless of output capacitor size,  
output current is limited to the value allowed by the  
threshold determined by the internal current limiting  
circuitry. Refer to the internal current limit threshold  
specifications stated in the Electrical Characteristics  
section of this datasheet. This permits very large  
output capacitors to be used.  
For example, USB ports are specified to have at  
least 120µF of downstream capacitance from their  
controlling power switch. An output capacitance as  
large as 1000µF would not disturb the input power  
supply to an AAT4625 used to control a USB port.  
EN Input  
If a fault flag delay greater than 10ms is required,  
addition delay may be added by use of an RC filter.  
An RC filter can be added to the fault flag output,  
as shown in Figure 1.  
The AAT4625 is available in both active high and  
active low enable versions. For specific part num-  
bers, refer to the Ordering Information section of this  
V+  
100kΩ  
AAT4625  
USB Controller  
1
2
3
4
8
7
6
5
R1  
10kΩ  
EN  
OUT  
Over-Current  
Flag Input  
FLG  
IN  
GND OUT  
NC NC  
C1  
0.1μF  
Figure 1: Fault Flag Delay RC Filter.  
4625.2006.04.1.2  
9
1...6789101112...15

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