250mA LDO Linear Regulators with Current-Limiting Switch

The MAX4834/MAX4835 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 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 soft-start control function to eliminate false reset during startup. The MAX4834 provides an active-low FLAG function to notify the system when the load current exceeds the limit. The MAX4835 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 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.

Applications

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

* 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

* Active-Low FLAG and Latch Off (MAX4834) or Active-Low RESET (MAX4835)

* Tiny SOT23 and TDFN (3mm x 3mm) Packages