Features: ` Guaranteed Current Limit: 50mA, 100mA
` Thermal Shutdown Protection
` Reverse-Current Protection
` 0.7 On-Resistance (MAX4826MAX4831)
` 14ms Guaranteed Blanking Time
` Fault Flag (FFLG)
` No-Load Flag (NOLD)
` 65A Supply Current
` 8A Latch-Off Current
` 0.01A Shutdown Current
` +2.3V to +5.5V Supply Range
` Undervoltage Lockout
` Fast Current-Limit Response Time
` 6-Pin DFN Package (1mm x 1.5mm)ApplicationGPS Systems
Cell Phones
Digital Still Cameras
PDAs and Palmtop Devices
MP3 PlayersPinout
SpecificationsIN, ON, FFLG, NOLD, OUT to GND .........................-0.3V to +6V
OUT Short Circuit to GND ..............................Internally Limited
Continuous Power Dissipation (TA = +70°C)
6-Pin DFN (derate 2.1mW/C above +70°C)...............168mW
Operating Temperature Range .....................-40°C to +85°C
Junction Temperature..................................................+150°C
Storage Temperature Range .......................-65°C to +150°C
Lead Temperature (soldering, 10s) .............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional peration of the device at these or any other conditions beyond those ndicated in the operational sections of the specifications is not implied. Exposure to bsolute maximum rating onditions for extended periods may affect device reliability.
DescriptionThe MAX4826MAX4831 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 0.7 on-resistance and operate from a +2.3V to +5.5V input voltage range. These devices are available with guaranteed 50mA and 100mA 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 10mA (MAX4826MAX4829), or 5mA (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 MAX4826MAX4831 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 MAX4826MAX4831 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 MAX4826MAX4831 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 DFN package.
MAX4826MAX4831 Data Sheet
