描述 Description

The uP8801S is a 3A 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 uP8801Sdelivers high-current and ultra-low-drop output voltage aslow as 0.8V for applications where VOUT is very close toVIN.

The uP8801S features comprehensive control andprotection functions: a power on reset (POR) circuit formonitoring both control and power inputs for properoperation; an EN input for enabling or disabling the device,a power OK with time delay for indicating the output voltagestatus, a foldback current limit function, and a thermalshutdown function.

The uP8801S 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

? 3A Guaranteed Output Current
? 300mV @ 3A Dropout Voltage

? Very Low On-Resistance
? 100mΩ 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