Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFN

The MAX1589 low-dropout linear regulator operates from a +1.62V to +3.6V supply and delivers a guaranteed 500mA continuous load current with a low 175mV dropout. The high-accuracy (±0.5%) output voltage is preset to internally trimmed voltages from +0.75V to +3.0V. An active-low, open-drain reset output remains asserted for at least 70ms after the output voltage reaches regulation. This device is offered in 6-pin thin SOT23 and 6-pin 3mm x 3mm thin DFN packages.

An internal PMOS pass transistor maintains low supply current, independent of load and dropout voltage, making the MAX1589 ideal for portable battery-powered equipment such as personal digital assistants (PDAs), digital still cameras, cell phones, cordless phones, and notebook computers. Other features include logic-controlled shutdown, short-circuit protection, and thermal-overload protection.

Applications

* CD and MP3 Players * Cellular and PCS Phones * Digital Still Cameras * Handheld Computers * Notebook Computers * PCMCIA Cards * PDAs and Other Handheld Devices

* Low 1.62V Minimum Input Voltage

* Guaranteed 500mA Output Current

* ±0.5% Initial Accuracy

* Low 175mV Dropout at 500mA Load

* 70ms Active-Low RESET Output Flag

* Supply Current Independent of Load and Dropout Voltage

* Logic-Controlled Shutdown

* Thermal-Overload and Short-Circuit Protection

* Preset Output Voltages (0.75V, 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, and 3.0V)

* Tiny 6-Pin Thin SOT23 Package (< 1.1mm High)

* Thin 6-Pin TDFN Package (< 0.8mm High)