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Page 70


www.us- tech.com


June, 2019


Plano, TX — Diodes Incorporated has introduced AP7345D family of low- dropout (LDO) voltage regulators that offer high power supply rejec- tion ratio (PSRR) and low quiescent current, making them suitable for applications powered by primary cells, such as AA or AAA batteries. The AP7345D offers independ-


Diodes Incorporated Intros New Dual LDOs


ent voltage input with an enable pin for controlling the output. This pro- vides for more flexibility when designing the power source for appli- cations. Each channel switches off or on within approximately 10 µs of the EN pin changing state, while the EN pin on each channel can also be tied high if output control is not required. The AP7345D family has an


excellent PSRR of 75 dB at 1 kHz, across the full output voltage range. The input voltage range extends from 1.7 to 5.25V and each of the two channels can deliver up to 300 mA, guaranteed. The inclusion of short- circuit protection ensures the LDO does not sustain damage in the event of a short circuit on either of the out- put voltage rails.


AP7345D dual low-dropout voltage regulators.


The family comprises 22 devices


covering a range of fixed dual- input/dual-output voltages between 1.2 and 3.6V, with an accuracy of ±1 percent. With such a comprehensive range, the AP7345D family can address a wide variety of battery-pow- ered applications. The addition of an LDO enables more of the primary cells’ voltage to be used, extending the useful


lifetime between battery


changes. In addition, choosing an LDO with high PSRR ensures a steady and regulated supply voltage to sensitive


integrated circuits. Contact: Diodes, Inc., 4949


Hedgcoxe Road, Suite 200, Plano, TX 75024 % 972-385-6292 E-mail: glen_wynn@diodes.com Web: www.diodes.com


Plessey Develops Method for Green LED Mfg.


Plymouth, UK — Plessey has devel- oped a proprietary 2D planar gallium nitride on silicon (GaN-on-Si) to emit green light, without the need for color conversion techniques. To pro- duce green light, LED manufacturers typically apply phosphors or quan- tum dot conversion materials to native blue LEDs. These materials then convert short wavelength, typi- cally 450 nm, blue light to red or green wavelengths with roughly 10 to 30 percent efficiency. Plessey’s native green LEDs are


formed using its proprietary GaN-on- Si epitaxial growth process similar to the native blue LEDs with the princi- pal difference coming in the amount of indium that is incorporated in the quantum well structures of the LED. With no color conversion losses, the native green emission is orders of magnitude times brighter than color


converted process for microLEDs. Contact: Plessey Semicon -


ductors, Ltd., Tamerton Road, Roborough, Plymouth, Devon, PL6 7BQ, UK % +44-1752-693000 E-mail: customer.care@plesseysemi.com Web: ww.plesseysemiconductors.com


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