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AAT4650 PDF预览

AAT4650

更新时间: 2024-09-23 22:49:55
品牌 Logo 应用领域
ANALOGICTECH 开关电源开关PC
页数 文件大小 规格书
12页 430K
描述
5V/3V PC Card Power Switch

AAT4650 数据手册

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AAT4650  
5V/3V PC Card Power Switch  
SmartSwitch  
General Description  
Features  
The AAT4650 SmartSwitch™ is a single channel PC  
Card (PCMCIA) power switch. It is used to select  
between two different voltage inputs, each between  
2.7V and 5.5V. An internal switch powers the cir-  
cuitry from whichever input voltage is higher. The  
device's output, VCC, is slew rate controlled and cur-  
rent limited, in compliance with PC Card specifica-  
tions. The current limit response time to a short cir-  
cuit is typically 1µs. The internal P-Channel MOS-  
FET switches are configured to break before make,  
that is, both switches cannot be closed at the same  
time. Controlled by a 2 bit parallel interface, the four  
states for VCC are VCC5, VCC3, Hi-impedance, or  
Ground. When in the ground state, VCC is pulled to  
ground by a 5kresistor. An open drain FAULT out-  
put is asserted during over-current conditions.  
During power up slewing, FAULT also signals that  
2.7V to 5.5V Input voltage range  
85m(5V) typical RDS(ON)  
Low quiescent current 15µA (typ)  
Reverse-blocking switches  
Short-circuit protection  
Over-temperature protection  
FAULT flag output  
Temp range -40 to 85°C  
8 pin SOP or TSSOP package  
Applications  
Notebook Computer  
PDA, Subnotebook  
Power Supply Multiplexer Circuit  
VCC is out of tolerance. An internal over temperature  
sensor forces VCC to a high impedance state when  
an over-temperature condition exists. Quiescent  
current is typically a low 15µA, as long as ICC is less  
than approximately 500mA. Above this load current,  
the quiescent current increases to 200µA.  
The AAT4650 is available in 8-pin SOP and  
TSSOP packages specified over -40 to 85°C.  
Typical Application  
8
VCC5  
VCC5  
VCC3  
5
3
2
4
1
VCC3  
CTL1  
CTL0  
FAULT  
GND  
6,7  
VCC  
VCC  
CTL1  
CTL0  
FAULT  
AAT4650  
CIN5  
CIN3  
COUT  
1µF  
1µF  
0.1µF  
GND  
GND  
4650.2001.10.0.93  
1

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