MAX1589A

19-3664; Rev 0; 4/05 Low-Input-Voltage, 500mA LDO Regulator with RESET in SOT and TDFN General Description The MAX1589A 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 MAX1589A 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. o o o o o o o o o o o Features Low 1.62V Minimum Input Voltage Guaranteed 500mA Output Current ±0.5% Initial Accuracy Low 175mV Dropout at 500mA Load 70ms 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, 1.3V, 1.5V, 1.8V, 2.5V, and 3.0V) Tiny 6-Pin Thin SOT23 Package (