uP8808P/Q数据手册uPI(UBIQ)中文资料规格书

描述 Description

The uP8808P/Q is an ultra low noise, fast response, highpower supply rejection ratio (PSRR) low dropout regulatorspecifically designed to continuously deliver up to 1.5Aoutput current. Designed with a P-channel MOSFET seriespass transistor, the uP8808P/Q yields extremely lowdropout voltage (e.g. 240mV at 1A) and maintains verylow ground current (200uA).

The uP8808P/Q is designed and optimized to work withlow-value, low-cost ceramic capacitors. Only a 4.7uFceramic output capacitor is required for stable operationfor any load conditions, ideal suitable for portable RF andwireless applications where PCB size are speciallyconcerned. A bypass pin is provided to reduce output noisevoltage and improve PSRR to 35dB at 100kHz.

Other features include foldback overcurrent protection,quick soft start, and overtemperature protection. TheuP8808P/Q is available in fixed output voltage from 0.8Vto 3.3V with 0.1V per step. The device comes in SOT223-3L and TO252-3L packages.

特性 Features

• Wide Input Voltage Range from 2.2 to 5.5V
• Ultra Low Dropout Voltage: 240mV @ 1A
• High Power Supply Rejection Ratio
• 60dB at 100Hz
• 35dB at 100kHz
• Ultra Low Output Noise Voltage: 50uV(RMS)
• Ultra Fast Response to Line/Load Transient
• Stable with 4.7uF Ceramic Output Capacitor
• Low Ground Current: 200uA
• Low Shutdown Current: < 1uA
• Foldback Output Current Limit
• High Output Accuracy
• 1.5% Initial Accuracy
• Fixed Output Voltages: 0.8V to 3.3V with 0.1V Per Step

• Over-Temperature Protection
• RoHS Compliant and Halogen Free

应用 Application

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