500mA Low-Dropout Linear Regulator in UCSP

The MAX1819 low-dropout linear regulator operates from a 2.5V to 5.5V supply and delivers a guaranteed 500mA load current with low 120mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see the Selector Guide in the full data sheet) or can be adjusted from 1.25V to 5V with an external resistive-divider.

An internal PMOS pass transistor allows the low 125µA supply current to remain independent of load, making this device ideal for portable battery-operated equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, base stations, and notebook computers.

Other features include an active-low, open-drain reset output that indicates when the output is out of regulation, a 0.1µA shutdown, short-circuit protection, and thermal shutdown protection. The device is available in a miniature 6-pin UCSP™ package.

Applications

* Base Stations * Cellular and Cordless Telephones * Docking Stations * Notebook Computers * Palmtop Computers * Personal Digital Assistants (PDAs) * USB Hubs

* Guaranteed 500mA Output Current

* Low 90mV Dropout at 500mA

* ±1% Initial Output Accuracy

* Preset Output at 1.5V, 1.8V, 2V, 2.5V, 3.3V, 5V

* Adjustable Output from 1.25V to 5V

* Power-OK Output

* Low 125µA Ground Current

* 0.1µA Shutdown Current

* Thermal Overload Protection

* Output Current Limit

* Tiny 840mW 6-Pin UCSP Package