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MAX4834, MAX4835
250mA LDO Linear Regulators with Current-Limiting Switch


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Description
FULL DATA SHEET (PDF, 360kB)
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The MAX4834/MAX4835 family of low-dropout linear regulators (LDOs) feature an accurate current-limiting switch with an integrated FLAG-bar or RESET-bar function. These devices operate from 2.5V to 5.5V and deliver up to 250mA of load current at a preset output voltage. Preset output voltage levels are 1.8V/2.5V/2.8V/3.0V/3.3V.

The MAX4834/MAX4835 offer a programmable softstart control function to eliminate false reset during startup. The MAX4834 provides a FLAG-bar function to notify the system when the load current exceeds the limit. The MAX4835 provides a RESET-bar function to notify the system when the output drops below the threshold. Additionally, reverse-current protection prevents current flowing from the output to the input. Other features include a low 90µA quiescent current, a 0.1µA shutdown current.

The MAX4834/MAX4835 are available in space-saving 6-pin SOT23 and TDFN packages. Each device is specified over the -40°C to +85°C extended temperature range. Contact factory for other programmed output voltage versions from 1.5V to 3.3V in 100mV increments.

For pin-compatible 100mA versions of this device, refer to the MAX4832/MAX4833. For pin-compatible 500mA versions of this device, refer to the MAX4836/MAX4837.

Key Features   Applications/Uses
  • Guaranteed Minimum 250mA Load Current
  • Accurate Current Limit
  • Preset Output Voltages: 1.8V/2.5V/2.8V/3.0V/3.3V
  • 2.5V to 5.5V Supply Voltage Range
  • Adjustable Soft-Start
  • Low Dropout Voltage
  • Thermal Shutdown
  • Reverse-Current Protection
  • Shutdown Output Discharge (MAX4835)
  • Low 90µA Supply Current
  • Ultra-Low 0.1µA Shutdown Current
  • FLAG-bar and Latch Off (MAX4834) or RESET-bar (MAX4835)
  • Tiny SOT23 and TDFN (3mm x 3mm) Packages

     
  • Cell Phones
  • Global Positioning Systems (GPS)
  • Notebook Computers
  • PDAs and Palmtop Devices
  • SDIO Ports and Devices
  • USB Ports and Devices

    Key Specifications:   Current Limit Switches
    Part Number Current Limit (mA) Functions Max. Load Current (A) RON (typ) (Ω) Switch Op. Voltage Range (V) Fault Indicator RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C)
    MAX4834  250
    FLAG function
    Fault Blanking
    0.25 0.4 2.5 to 5.5 Yes No TDFN-EP/6 10 -40 to +85
    MAX4835 
    Reset
    No See Data Sheet See Data Sheet  - 
    See All Current Limit Switches (27)

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    Document Ref.: 19-3373; Rev 0; 2004-08-04
    This page last modified: 2004-08-10


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