LX8821
TM ®
DUAL CHANNEL 2.5A LOW DROPOUT REGULATOR
P RODUCTION
DATA
S HEET
DESCRIPTION
KEY FEATURES Two Independe...
LX8821
TM ®
DUAL CHANNEL 2.5A LOW DROPOUT REGULATOR
P RODUCTION
DATA
S HEET
DESCRIPTION
KEY FEATURES Two Independent Regulated Outputs Wide DC Supply
Voltage of 3.0V to 10.0V Accurate Output
Voltages Low Tolerance Line (0.5%) and Load (0.5%) Regulation Max. Dropout of 0.6V at Rated Current Independent Thermal and Current Limit Protection Loop Stability Independent of Output Capacitor Type SMT Power Package APPLICATIONS/BENEFITS 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...