Intersil LDOs Utilise Bicmos Technology

Intersil has introduced the ISL80102 and ISL80103, a pair of low-voltage, high-current, low dropout linear regulators (LDOs), specified at 2A and 3A output current respectively. The parts utilise Bicmos technology, providing a fast transient response, which ensures that the output voltage is properly regulated under varying load current changes. They also feature 120mV dropout at 3A and 81mV dropout at 2A.

Operating from input voltages of 2.2V to 6V, the ISL80102 and ISL80103 are capable of providing supply output voltages of 0.8V to 5V on the adjustable versions. Fixed output voltages of 0.8V, 1.2V, 1.8V, 2.5V, 3.3V and 5V are also available, along with custom voltage options. Initial VOUT accuracy is +/- 0.5 per cent, and the devices provide +/- 1.8 per cent guaranteed VOUT accuracy for the junction temperature range of -40C to +125C, assuring point-of-load voltage regulation in critical applications.

Shutdown current is less than 1microA, and PSRR is 60dB over full-rated load current. The two LDOs also include an enable feature, so they can be placed into a low quiescent current shutdown mode. Additional capabilities, including 'power good' status indicator, soft-start, over-current protection and thermal shutdown, ensure the LDOs are reliable and customisable for various applications.

This combination of features are said to make the ISL80102 and ISL80103 ideal for a range of applications including core power supplies for microprocessors, DSPs and FPGAs, as well as instrumentation applications, industrial medical equipment, servers and networking equipment. The devices are manufactured using a Bicmos process, meaning that they consume lower quiescent current as a function of load, compared with LDOs manufactured using older bipolar processes. The ISL80102 and ISL80103 are available in compact 3 x 3 10-lead DFN packages.

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