The AAT4620 SmartSwitch is a current limited P-channel MOSFET power switch designed for high-side load-switching 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.
The AAT4620 SmartSwitch is a current‑limited P‑channel MOSFET power switch designed for high‑side load‑switching in PCMCIA GSM/GPRS/3G modem cards. It provides two independent programmable current limits, a power‑loop for super‑capacitor charging, and a System READY output.
The document includes pin descriptions, absolute maximum ratings, thermal and electrical characteristics, typical performance curves, and ordering information for the 12‑pin TSOPJW package.
| Operating Voltage (VCC) | 3.0 V to 5.5 V |
|---|---|
| Temperature Range | -40 °C to 85 °C |
| Maximum Continuous Switch Current | 2.5 A |
| Maximum Power Dissipation | 625 mW |
| Shutdown Supply Current | < 1 pA |
The device operates from 3.0 V to 5.5 V.
It is specified for operation between –40 °C and 85 °C.
The maximum continuous switch current is 2.5 A.