MAX4880 Datasheet | Maxim Integrated

Description The MAX4880 is an overvoltage-protection controller with an internal current-limited switch that can be configured as a low-cost battery charger. When the input voltage exceeds the overvoltage trip level (5.7V), or drops below the undervoltage-lockout level (4.2V), the MAX4880 turns off the external n-channel MOSFET and asserts an undervoltage/overvoltage flag indicator (FLAGV) low to notify the processor. The MAX4880 internal current-limited switch limits the charge current flowing to the battery to 525m A. The switch opens when the battery voltage reaches its fullcharged state (4.2V), and a flag (BAT_OK) asserts to notify the processor. The MAX4880 includes a switchcontrol input (CB) to turn off the internal current-limited switch, regardless of the battery voltage. The MAX4880 also features a built-in startup delay that allows the adapter voltage to settle down before turning on the MOSFET. Other features include 15k V ESD protection for the input and a shutdown function (EN) to turn off the external n-channel MOSFET. The MAX4880 is available in a space-saving 10-pin TDFN package and is specified for operation over the .. extended -40°C to +85°C temperature range. - Overvoltage Protection Up to 28V - Preset 5.6V Overvoltage Trip Level - Internal 525m A Current-Limited Switch - ±1.2% Accurate Battery Disconnect (4.2V) - Drives Low-Cost n-Channel MOSFET - Internal 50ms Startup Delay - Overvoltage/Undervoltage-Fault FLAGV Indicator - Battery-Voltage-Trip BAT_OK Indicator - Undervoltage Lockout - Thermal Shutdown Protection - Tiny 10-Pin TDFN Package Features Ordering Information PART MAX4880ETB TEMP RANGE -40°C to +85°C PINPACKAGE 10 TDFN-EP- TOP MARK APJ Applications Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players - EP = Exposed Pad Typical Operating Circuit AC-DC ADAPTER 5.25V IN GATE BTA Pin Configuration BAT_OK FLAGV TOP VIEW BTB_SNS DC-DC CONVERTER Li+...