MAX4881

The MAX4881/MAX4882 feature an internal 1.1A current-limited switch, while the MAX4883B/MAX4883C/ MAX4884B/MAX4884C include an internal 0.7A currentlimited switch. A current-limit flag (FLAGI)asserts to indicate a current fault condition. The MAX4881-MAX4884/MAX4893B have a control input (CB)that is used to turn on and off the internal current-limited switch. Other features include a shutdown function (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 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/MAX4893B overvoltage protection (OVP)controllers with built-in current-limited switch, protect low-voltage systems against voltages of up to 28V. When the input voltage exceeds the overvoltage trip level of 5.6V (MAX4881/MAX4883/MAX4893B)or 4.5V (MAX4882/MAX4884), the external n-channel MOSFET is turned off to prevent damage to the protected components. An undervoltage/overvoltage flag indicator (OV)notifies the processor that an undervoltage/overvoltage fault condition is present. The MAX4881MAX4884/MAX4893B are offered in a space-saving 10-pin TDFN package and operate over the extended -40°C to +85°C temperature range.

The features of MAX4881 can be summarized as (1)overvoltage protection up to 28V; (2)preset overvoltage trip level 5.6V (MAX4881/MAX4883/MAX4893B)/ 4.5V (MAX4882/MAX4884); (3)internal current-limited switch 1.1A (MAX4881/MAX4882)/ 0.7A (MAX4883/MAX4884)/ 0.9A (MAX4893B); (4)drives low-cost n-channel MOSFET; (5)internal 50ms startup delay; (6)overvoltage fault OV indicator; (7)current-limit fault FLAGI indicator; (8)undervoltage lockout; (9)thermal shutdown protection; (10)tiny 10-Pin TDFN Package.

The absolute maximum ratings of MAX4881 are (1)IN: -0.3V to +30V; (2)GATE: -0.3V to +12V; (3)EN, CB, OV, FLAGI, BTA, BTB: -0.3V to +6V; (4)continuous power dissipation (TA = +70°C)10-Pin TDFN (derate 18.5mW/°C above +70°C): 1481.5mW; (5)operating temperature range: -40°C to +85°C; (6)junction temperature:+150°C; (7)storage temperature range: -65°C to +150°C; (8)lead temperature (soldering, 10s): +300°C.