Diodes Introduces Fast Transient Response LDO for Low Power and Portable Applications

(Product News, 27 Apr 2007)

Diodes Inc., a global manufacturer and supplier of high-quality application specific standard products within the broad discrete and analog semiconductor markets, has launched the 300mA fast transient response LDO, which combines low quiescent current and adjustable regulation down to 1V, making it optimized for portable and low-power applications such as mobile phones, digital media players, Bluetooth headsets and handheld GPS.

Designed for simple integration into a wide variety of low-power circuits, the new LDO can deliver up to 300mA from a 2V to 6V input range and provides the faster transient response required increasingly by today's high speed logic, DSPs, and micro-controllers, while still requiring only a standard 1µF ceramic output capacitor, reducing the size and cost of this external component. And it achieves this with a quiescent current half of what is typical for a device of this performance. The AP133 is ideal to power the latest fast-clock low-voltage core ICs currently used in many low power portable applications. With a low quiescent current of 40µA, the AP133 requires only a small amount of current to maintain regulation from 0mA load to full load, thereby significantly extending battery run-time; and the AP133 only sees an output voltage sag during fast load transients of less than one-third that of its closest competitors.

Providing an adjustable output voltage from 5V down to 1.0V, approximately 20 percent lower than comparable devices, this LDO also features circuit-protection capabilities such as over-current protection, short-circuit protection, and thermal shutdown preventing system failures. With highly accurate output-voltage regulation, including ±2 percent accuracy, the AP133 helps to ensure accurate, reliable system operation from –40°C to 85°C ambient temperature range.

The adjustable LDO, AP133, is offered in the small SOT-25 package and in a 35 percent smaller package option, the micro 2x2mm DFN2020-6 package, ideal for both industrial and portable applications.

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