Analog Devices MAX4837 Product Info

• Guaranteed Minimum 500mA 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 (MAX4837)
• Low 90µA Supply Current
• Ultra-Low 0.1µA Shutdown Current
• Active-Low FLAG and Latch Off (MAX4836) or Active-Low RESET (MAX4837)
• Tiny SOT23 and TDFN (3mm x 3mm) Packages

The MAX4836/MAX4837 family of low-dropout linear regulators (LDOs) feature an accurate current-limiting switch with an integrated active-low FLAG or active-low RESET function. These devices operate from 2.5V to 5.5V and deliver up to 500mA of load current at a preset output voltage. Preset output voltage levels are 1.8V/2.5V/2.8V/3.0V/3.3V.

The MAX4836/MAX4837 offer a programmable soft-start control function to eliminate false reset during startup. The MAX4836 provides an active-low FLAG function to notify the system when the load current exceeds the limit. The MAX4837 provides an active-low RESET 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 MAX4836/MAX4837 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 250mA versions of this device, refer to the MAX4834/MAX4835.

Applications

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