MAX1806 Datasheet | Maxim Integrated

Description The MAX1806 low-dropout linear regulator operates from a +2.25V to +5.5V supply and delivers a guaranteed 500m A load current with low 175m V dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see Selector Guide) or can be adjusted from +0.8V to +4.5V with an external resistive-divider. An internal PMOS pass transistor allows low 210µA supply current, making this device ideal for portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, and other equipment, including base stations and docking stations. Other features include an active-low, power-OK output that indicates when the output is out of regulation, a 0.02µA shutdown mode, short-circuit protection, and thermal shutdown protection. The MAX1806 es in a miniature 1.3W, 8-pin power-µMAX package with a metal pad on the underside of the package. Applications Notebook puters Cellular and Cordless Telephones PDAs Palmtop puters Base Stations USB Hubs Docking Stations Features o Guaranteed 500m A Output Current o Output Down to 0.8V o Low 175m V Dropout at 500m A o ±1% Output Voltage Accuracy Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V Adjustable from 0.8V to 4.5V o Power-OK Output o Low 210µA Ground Current o 0.02µA Shutdown Current o Thermal Overload Protection o Output Current Limit o Tiny 1.3W, 8-Pin Power-µMAX Package Ordering Information PART MAX1806EUA_ _ TEMP. RANGE -40°C to +85°C PIN-PACKAGE 8 Power-µMAX PART AND SUFFIX MAX1806EUA33 MAX1806EUA25 MAX1806EUA18 MAX1806EUA15 MAX1806EUA08 Selector Guide VOUT (V) 3.3 2.5 1.8 1.5 0.8 TOP MARK AAAG AAAH AAAI AAAJ AAAK Typical Operating Circuit Pin Configuration VIN +2.25V TO +5.5V CIN 1µF NINC ON SHDN SET GND VOUT 0.8V TO 4.5V COUT 10µF RPOK 100kΩ TO µC TOP VIEW IN 1 IN 2 POK 3 SHDN 4 8 OUT 7 OUT 6 SET 5 GND µMAX ________________________________________________________________ Maxim Integrated Products...