MAX4828 Datasheet | Maxim Integrated

19-3672; Rev 0; 5/05 50m A/100m A Current-Limit Switches with NO-LOAD Flag in µDFN General Description The MAX4826- MAX4831 family of switches has internal current limiting to prevent host devices from being damaged due to faulty load conditions. These analog switches have a low 0.7Ω on-resistance and operate from a +2.3V to +5.5V input voltage range. These devices are available with guaranteed 50m A and 100m A current limits, making them ideal for loadswitching applications. In addition to the current-limit fault flag (FFLG), an open-drain no-load flag indicator (NOLD) notifies the system when the current through the switch is less than 10m A (MAX4826- MAX4829), or 5m A (MAX4830/MAX4831). 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 MAX4826/MAX4828/MAX4830 enter a latch-off state where the switch is turned off, and FFLG is issued to the microprocessor. The switch can be turned on again by cycling the power or ON. The MAX4827/MAX4829/MAX4831 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 current-limit fault flag (FFLG) is issued and remains low until after the fault condition is removed. The switch remains on after the overload condition disappears. The MAX4826- MAX4831 operate over the extended -40°C to +85°C temperature range, and are available in a tiny space-saving, 1mm x 1.5mm, 6-pin µDFN package. .. Features - Guaranteed Current Limit: 50m A, 100m A - Thermal Shutdown Protection - Reverse-Current Protection - 0.7Ω On-Resistance (MAX4826- MAX4831) - 14ms Guaranteed Blanking Time - Fault Flag (FFLG) - No-Load Flag (NOLD) - 65µA Supply Current - 8µA Latch-Off Current - 0.01µA Shutdown Current - +2.3V to +5.5V Supply Range - Undervoltage Lockout - Fast Current-Limit...