The ISL80505 is a single output Low Dropout voltage regulator

(LDO) capable of sourcing up to 500mA output current. This

LDO operates from input voltages of 1.8V to 6V. The output

voltage of ISL80505 can be programmed from 0.8V to 5.5V.

A submicron BiCMOS process is utilized for this product family

to deliver the best in class analog performance and overall

value. This CMOS LDO consumes significantly lower quiescent

current as a function of load compared to bipolar LDOs, which

translates into higher efficiency and packages with smaller

footprints.

State-of-the-art internal compensation achieves a very fast

load transient response and excellent PSRR. The ISL80505

provides an output accuracy of ±1.8 VOUT accuracy over all

load, line and temperature variation (TJ = -40°C to +125°C).

An external capacitor on the soft-start pin provides an

adjustable soft starting of the output voltage ramp to control

the inrush current. The ENABLE feature allows the part to be

placed into a low quiescent current shutdown mode.

Features

• ±1.8 VOUT accuracy guaranteed over line, load and

TJ = -40°C to +125°C

• Very low 45mV dropout voltage at VOUT = 2.5V

• Stable with a 4.7µF output ceramic capacitor

• Very fast transient response

• Programmable output soft-start time

• Excellent PSRR over wide frequency range

• Current limit protection

• Thermal shutdown function

• Available in an 8 Ld DFN package

• Pb-free (RoHS compliant)

Applications

• Noise sensitive instrumentation systems

• Post regulation of switched mode power supplies

• Industrial systems

• Medical equipment

• Telecommunications and networking equipment

• Servers

• Hard disk drives (HD/HDD)