AAT4620 PCMCIA Current Limit Interface and Capacitor Charger

The AAT4620 SmartSwitch is a current limited P-channel MOSFET power switch designed for high-side loadswitching applications in PCMCIA GSM/GPRS/3G modem cards. Used in conjunction with a super capacitor, the AAT4620 will ensure that the power ratings of the PCMCIA host are not exceeded at any time. Featuring two independent, programmable current limits and a power loop, the AAT4620 can ensure that the super capacitor can be charged without exceeding PCMCIA specifications. The current limit is set by two external resistors allowing a ±10% current limit accuracy over the normal operating temperature range. The switch can be controlled from either of the two enable inputs and in the off condition will block currents in both directions. The AAT4620 also incorporates a System READY function which can advise the system that the super capacitor is fully charged and ready for use. Adjustable hysteresis is provided with the addition of an external resistor. The quiescent supply current is typically a low 40μA. In shutdown mode, the supply current decreases to less than 1μA. The AAT4620 is available in a thermally enhanced, Pb-free, 12-pin TSOPJW package and is specified over the -40°C to 85°C temperature range.

技术特性

VIN Range: 3.0V to 5.5V
Dual Independent Current Limits
100mA to 1200mA
±10% Current Accuracy
20°C Temperature Band
Reverse Current Blocking Protection
Power Loop
Low Quiescent Current
40μA Typical
1.0μA Max with Switch Off
65m Typical RDS(ON) at 3V
Only 1.4V Needed for Enable Control Pin
System READY Output with Externally Programmable
Hysteresis
Under-Voltage Lockout
Temperature Range: -40°C to 85°C
12-Pin TSOPJW Package

订购信息 Ordering Information

AAT4620

应用领域 APPLICATION

CF Card Port Power Protection
Express Card GSM/GPRS/3G Modems
Hot Swap Supplies
PCMCIA Card GSM/GPRS/3G Modems
Personal Communication Devices

功能框图 Functional Block Diagram

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT4620 数据资料DataSheet下载:pdf	Rev.V2	2 页