描述 Description

The uP8803 is a 2A ultra low dropout linear regulatorspecifically designed for motherboard, notebook and graphiccard applications. This device works with dual supplies, acontrol input for the control circuitry and a power input aslow as 1.2V for providing current to output. The uP8803delivers high-current and ultra-low-drop output voltage aslow as 0.8V for applications where VOUT is very close toVIN.

The uP8803 features comprehensive control and protectionfunctions: a power on reset (POR) circuit for monitoringboth control and power inputs for proper operation; an ENinput for enabling or disabling the device, a power OK withtime delay for indicating the output voltage status, afoldback current limit function, and a thermal shutdownfunction.

The uP8803 is available in PSOP - 8L or WDFN3x3 - 10Lpackages with very low thermal resistance.

特性 Features

·Works with 1.2V~5.5V VIN
·Adjustable Output Voltage, Down to 0.8V.
·1.5% Initial Accuracy.
·Excellent Line and Load Regulation.

·2A Guaranteed Output Current.
·300mV @ 2A Dropout Voltage.

·Very Low On-Resistance.
·150mΩ typical.

·VOUT Pull Low Resistance when Disabled.
·VOUT Power OK Signal.
·Fast Transient Response.
·Low External Component Count.
·Low Cost and Easy to Use.
·Over Current and Over Temperature Protection.
·RoHS Compliant and Halogen Free.

應用 Application

·Desktop PCs, Notebooks, and Workstations.
·Graphic Cards.
·Low Voltage Logic Supplies.
·Microprocessor and Chipset Supplies.
·Split Plane Microprocessor Supplies.
·Advanced Graphics Cards Supplies.
·SoundCards and Auxiliary Power Supplies.
·SMPS Post Regulators.