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

Diodes Inc. announced the launch of a new 300mA fast transient response LDO, which combines low quiescent current and adjustable regulation down to 1.0V 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 2 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 1uF ceramic output capacitor, reducing the size and cost of this external component. The company claims that this is achieved with a quiescent current of half of what is typical for a device of this performance. The AP133 is suitable 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 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.

"The introduction of AP133 extends our traditional LDO product range and marks the first of several new high performance LDOs planned for introduction this year," remarked Mark King, Senior Vice President, Sales and Marketing of Diodes Incorporated. "Targeting performance oriented applications requiring the flexibility of adjustable output voltage down to an industry leading 1.0V effectively opens our LDO product line to the portable consumer electronic market."

Providing an adjustable output voltage from 5 down to 1.0V, approximately 20% 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 % accuracy, the AP133 is said to help to ensure accurate, reliable system operation from -40 to +85°C ambient temperature range.

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