MAXIM MAX4794EUS+T

The MAX4789–MAX4794 family of switches feature internal current limiting to prevent damage to host devices due to faulty load conditions. These analog switches have a low 0.2Ω on-resistance and operate from 2.3V to 5.5V input voltage range. They are available with guaranteed 200mA, 250mA, and 300mA current limits, making them ideal for SDIO and other load switching applications. When the switch is on and a load is connected to the port, a guaranteed blanking time of 14ms ensures that the transient voltages settle down. If after this blanking time the load current is greater than the current limit, the MAX4789, MAX4791, and MAX4793 enter a latch-off state where the switch is turned off and FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin. The MAX4790, MAX4792, and MAX4794 have an autoretry feature where the switch turns off after the blanking time and then continuously checks to see if the overload condition is present. The switch remains on after the overload condition disappears. The MAX4789–MAX4794 are available in 6-pin 3mm x 3mm TDFN and tiny space-saving 4-pin SOT143 packages. The MAX4789/MAX4790/MAX4791/MAX4793 are also available in a tiny 5-pin SOT23 package.

• Guaranteed Current Limit: 200mA, 250mA, 300mA
• Thermal-Shutdown Protection
• Reverse Current Protection
• 0.2Ω On-Resistance
• 14ms Guaranteed Blanking Time
• FLAG Function (MAX4789/MAX4791/MAX4793)
• 80μA Supply Current
• 8μA Latch-Off Current (MAX4789/MAX4791/MAX4793)
• 0.01μA Shutdown Current
• 2.3V to 5.5V Supply Range
• Undervoltage Lockout
• Fast Current-Limit Response Time (5µs)
• TDFN and SOT23/SOT143 Packages

• PDAs and Palmtop Devices
• Cell Phones
• GPS Systems
• Handheld Devices
• SDIO