LX8821

LX8821 TM ® DUAL CHANNEL 2.5A LOW DROPOUT REGULATOR P RODUCTION DATA S HEET DESCRIPTION KEY FEATURES ƒ Two Independent Regulated Outputs ƒ Wide DC Supply Voltage of 3.0V to 10.0V ƒ Accurate Output Voltages ƒ Low Tolerance Line (0.5%) and Load (0.5%) Regulation ƒ Max. Dropout of 0.6V at Rated Current ƒ Independent Thermal and Current Limit Protection ƒ Loop Stability Independent of Output Capacitor ƒ Type SMT Power Package APPLICATIONS/BENEFITS ƒ ƒ ƒ ƒ ƒ ƒ ASIC, Memory, I/O Low Voltage Logic Supplies Active SCSI Terminators Battery Charging Circuits PC Peripherals Instrumentation The LX8821 is a positive-voltage linear regulator with one fixed and one adjustable output featuring lowdropout and high accuracy. To maximize efficiency, the LX8821 accepts two supply voltage inputs for the VCONTROL and VPOWER sections. This configuration reduces power dissipation by operating the www.DataSheet4U.com regulator near dropout (VPWR-VOUT = VDO = 0.4V @ 2A) while providing sufficient operating headroom for the control logic. Each channel can supply up to 2.5A independently with a regulator design optimized for system efficiency by consuming minimal ground current and directing quiescent current to the load The internal voltage reference is trimmed at wafer level, enabling precise output voltages, typically ±1% of its specified value. Power sequencing logic ensures proper startup regardless of the level of VCTRL or VPWR. The LX8821 outputs remain off while VPWR < 2.2V. Thermal and Sh...