Simplified Block Diagram
- Cell Phones
- Digital Still Cameras
- MP3 Players
- PDAs and Palmtop Devices
The MAX4881/MAX4882 feature an internal 1.1A current-limited switch, while the MAX4883B/MAX4883C/MAX4884B/MAX4884C include an internal 0.7A current-limited switch. When the load current is at the current limit for longer than the blanking time, the switch of the MAX4881/MAX4882/MAX4883B/MAX4884B latches off and does not turn back on until Active-Low EN, CB, or IN is cycled. A current-limit flag (Active-Low FLAGI) asserts to indicate a current fault condition.
The MAX4883C/MAX4884C limit the current to 0.7A indefinitely until the thermal protection trips. An overcurrent flag output asserts to indicate a current fault condition after the blanking time has elapsed.
The MAX4881MAX4884 have a control input (CB) that is used to turn on and off the internal current-limited switch. Other features include a shutdown function (Active-Low EN) to disable the external n-channel MOSFET, and a built-in startup delay to allow the adapter voltage to settle down before turning on the MOSFET.
The MAX4881MAX4884 is offered in a space-saving 10-pin TDFN package and is specified for operation over the extended -40°C to +85°C temperature range.