描述 Description

The uP8805P is an ultra low noise, fast response, highpower supply rejection ratio (PSRR) low dropout regulatorspecifically designed to continuously deliver up to 500mAoutput current. Designed with a P-channel MOSFET seriespass transistor, the uP8805P yields extremely low dropoutvoltage (e.g. 180mV at 300mA, 300mV at 500mA) andmaintains very low ground current.

The uP8805P does not require a bypass capacitor, henceachieving the smallest PCB area. This device reducesoutput voltage noise to 100uV(RMS) and improves PSRR to40dB at 100kHz.

The uP8805P is designed and optimized to work with lowvalue,low-cost ceramic capacitors. Only a 1uF ceramicoutput capacitor is required for stable operation for any loadconditions.

Other features include foldback overcurrent protection, quicksoft start, and overtemperature protection. The uP8805Pis available in adjustable voltage from 0.8V to 3.3V with0.1V per step. The device comes in SOT23 - 5L andTSOT23-5L packages.

特性 Features

·Wide Input Voltage Range from 2.4 to 5.5V.
·Ultra Low Dropout Voltage: 180mV @ 300mA.
·High Power Supply Rejection Ratio
·70dB at 1kHz.
·40dB at 100kHz.

·Ultra Low Output Noise Voltage 100uV(RMS).
·Ultra Fast Response in Line/Load Transient.
·Stable with 1uF Ceramic Output Capacitor.
·Low Ground Current: 70uA.
·Low Shutdown Current: < 1uA.
·Foldback Output Current Limit.
·High Output Accuracy.
·1.5% Initial Accuracy.
·Adjustable Output Voltage from 0.8V to (VIN - Dropout Voltage).

·Over-Temperature Protection.
·RoHS Compliant and Halogen Free.

應(yīng)用 Application

·Cellular and Cordless Phones.
·Bluetooth Portable Radios and Accessaries.
·Battery-Powered Equipment.
·Laptop, Palmtops, Notebook Computers.
·Hand-Held Instruments.
·PCMCIA Cards.
·Portable Information Appliances.