Low-Dropout, Low-I, 1A Linear Regulator

The MAX1793 low-dropout linear regulator (LDO) operates from +2.5V to +5.5V and delivers a guaranteed 1A load current with a low 210mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see the Ordering Information in the full data sheet) or can be adjusted from 1.25V to 5.0V with an external resistor-divider.

An internal pMOS pass transistor allows a low 125µA supply current, making the MAX1793 ideal for battery-operated portable equipment. Other features include a built-in reset output, low-power shutdown, and short-circuit and thermal-overload protection. The MAX1793 is available in a 1.5W, 16-pin power TSSOP package, which is 30% smaller than a SOT223 package and only 1.1mm high.

Applications

* Docking Stations * Notebook Computers * PDAs * USB Hubs * Wireless Base Stations

* Guaranteed 1A Output Current

* Low 210mV Dropout at 1A

* Up to ±1% Output Voltage Accuracy

* Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V

* Adjustable from 1.25V to 5.0V

* Reset Output (4ms Delay)

* Low 125µA Ground Current

* 0.1µA Shutdown

* Low 115µVRMS Output Noise

* Thermal-Overload Protection

* Output Current Limit

* Tiny TSSOP Power Package (1.5W) 30% Smaller than SOT223 (only 1.1mm high)