19-2018; Rev 0; 4/01
500mA, Low-Voltage Linear Regulator in µMAX
MAX1806
General Description
The MAX1806 low-dropout l...
19-2018; Rev 0; 4/01
500mA, Low-
Voltage Linear Regulator in µMAX
MAX1806
General Description
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.
Applications
Notebook Computers
Cellular and Cordless Telephones
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Features
o Guaranteed 500mA Output Current o Output Down to 0.8V o Low 175mV Dropout at 500mA 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 M...