XR5550(稳压LDO)

一、Features

⚫ Vin Range up to 40V

⚫ Output range:1.5V～5.0V

⚫ Maximum output current: 250mA

⚫ PSRR: 80dB @1KHz

⚫ Dropout voltage:400mV @ IOUT=100mA

⚫ Ultra low quiescent current:1.5μA Typ.

⚫ Output voltage tolerances of ±2% Overthe temperature range

⚫ Internal thermal overload protection

⚫ Built-in Short-Circuit Protection, CurrentLimiter

二、Applications

⚫ E-meters, Water Meters and Gas Meters

⚫ Cellphones, radiophone, digital cameras

⚫ Fire Alarm, Smoke Detector

⚫ Appliances and White Goods

三、General Description

The XR5550 is ultra-low quiescent currentregulator features low dropout voltage and lowcurrent in the standby mode. With less than1.5μA quiescent current at no load, the

XR5550 is ideally suited for standby microcontrol-unit systems, especially for always-onapplications like E-meters, fire alarms, smokedetectors and other battery-operated systems.

The XR5550 retains all of the features that arecommon to low dropout regulators including a