LDO regulators for sensitive loads

Intersil has unveiled two new high performance, single output low-dropout (LDO) voltage regulators that provide enhanced dropout and transient performance for noise sensitive loads.

The ISL80510 and ISL80505 are able to deliver 1A and 0.5A of continuous output current and ultra-low dropout of 130mV and 45mV at full load, respectively.

The ISL80510/05 LDOs also provide improved transient performance which together with DC accuracy of 1.8% safeguards against voltage undershoots and overshoots to deliver clean point-of-load voltage to CPUs, DSPs and MCUs, which require tight voltage accuracy and low noise.

The ISL80510/05's compensation loop also provides noise filtering by maintaining a flat power supply rejection ratio (PSRR) response over a wide range of frequencies.

The ISL80510 operates from input voltages of 2.2V to 6V, and the ISL80505 supports 1.8V to 6V. The output voltage of both can be adjusted from 0.8V to 5.5V, which enables designers to cover a broad range of applications including low power RF amplifiers, communications equipment, industrial process control systems, test instruments, medical equipment, and consumer network routers.

An adjustable soft-start feature allows designers to control the input inrush current and program the startup time to accommodate any power-up sequencing requirement.