MAX4829:50mA/100mA Current-Limit Switches with NO-LOAD Flag in ?DFN

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 50mA and 100mA current limits, making them ideal for load-switching applications. In addition to the current-limit fault flag (active-low FFLG), an open-drain no-load flag indicator (active-low NOLD) notifies the system when the current through the switch is less than 10mA (MAX4826–MAX4829), 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 MAX4826/MAX4828/MAX4830 enter a latchoff 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 (active-low 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 tiny space-saving, 1mm x 1.5mm, 6-pin ?DFN package.

Key Features
  • Guaranteed Current Limit: 50mA, 100mA
  • Thermal Shutdown Protection
  • Reverse-Current Protection
  • 0.7Ω On-Resistance (MAX4826–MAX4831)
  • 14ms Guaranteed Blanking Time
  • Fault Flag (Active-Low FFLG)
  • No-Load Flag (Active-Low NOLD)
  • 65?A Supply Current
  • 8?A Latchoff Current
  • 0.01?A Shutdown Current
  • +2.3V to +5.5V Supply Range
  • Undervoltage Lockout
  • Fast Current-Limit Response Time
  • 6-Pin ?DFN Package (1mm x 1.5mm)
MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831: Typical Operating Circuit
MAX4826, MAX4827, MAX4828, MAX4829, MAX4830, MAX4831: Typical Operating Circuit
  • Cell Phones
  • Digital Still Cameras
  • Global Positioning Systems (GPS)
  • MP3 Players
  • PDAs and Palmtop Devices
titleDownload file
MAX4826-MAX4831?Data SheetMAX4826-MAX4831.pdf
Part NumberPower SwitchesCurrent Limit
Current Limit
Fault IndicatorCurrent Limit Accuracy
Current Limit Set ByRON
Oper. Temp.
minmaxtypminmaxSee Notes
MAX482615050Yes41Preset0.72.35.5-40 to +85?DFN/6-
MAX48291001000.7?DFN/6$1.13 @1k
MAX483050501.4?DFN/6$1.06 @1k
MAX483150501.4?DFN/6$2.57 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4829ELT+Active?DFN,;6 pin;1.6 mm?-40°C to +85°CLead Free
MAX4829ELT+TActive?DFN,;6 pin;1.6 mm?-40°C to +85°CLead Free
MAX4829ELT-TNo Longer AvailableMAX4829ELT+T?DFN,;6 pin;1.6 mm?-40°C to +85°CNo
MAX4826-MAX4831.pdf MAX4831
MAX4826-MAX4831_cn.pdf MAX4831
MAX4826-MAX4831_cn.pdf MAX4831
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