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MAX1806：500mA, Low-Voltage Linear Regulator in µMAX

Low Input and Output Voltage Linear Regulator Delivers Up to 500mA in a Tiny Power µMAX Package

The MAX1806 low-dropout linear regulator operates from a +2.25V to +5.5V supply and delivers a guaranteed 500mA load current with low 175mV 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 comes in a miniature 1.3W, 8-pin power-µMAX® package with a metal pad on the underside of the package.

Key Features Guaranteed 500mA Output Current Output Down to 0.8V Low 175mV Dropout at 500mA ±1% Output Voltage Accuracy Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V Adjustable from 0.8V to 4.5V Power-OK Output Low 210µA Ground Current 0.02µA Shutdown Current Thermal Overload Protection Output Current Limit Tiny 1.3W, 8-Pin Power-µMAX Package

MAX1806: Typical Operating Circuit Applications/Uses Cell Phones/Cordless Phones Docking Stations Notebook Computers Palmtop Computers PDAs USB Hubs Wireless Base Stations

DataSheet

Parametrics

Quality and Environmental Data

• MAX1806.pdf

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