SAN FRANCISCO/FRANKFURT (Reuters) - Apple Inc AAPL.O is taking control over the power-management technology at the heart of its iPhones in a $600 million deal with Dialog Semiconductor DLGS.DE that also secures the German-listed company's role as a supplier to the U.S. tech giant.

The agreement to license technology and take on people from the Anglo-German chip designer is not only unusual, but also the largest of its kind by Apple, whose last sizeable acquisition was the $350 million purchase of Face ID creator PrimeSense in 2013.

Dialog shares surged as much as 34 percent on Thursday, their most since 2002, as the deal bought the company time to reduce its dependence on Apple - which it expects to account for three-quarters of this year’s sales.

Dialog’s shares had tumbled earlier this year when it said Apple planned to use chips from another supplier.

Dialog Chief Executive Jalal Bagherli told Reuters he could now lead a “managed, smooth” transformation of the business as Dialog seeks new opportunities in areas such as the Internet of Things that includes connected devices like home speakers, fitness trackers or smart watches.

LONG-STANDING RELATIONSHIP

Since the first iPhones a decade ago, Apple has used Dialog power-management chips to extend their battery life. Under the deal, Apple is buying patents, taking on a 300-strong engineering team, most of whom already worked on chips for Apple devices, and Dialog offices in Britain, Italy and Germany.

Dialog said its 2018 revenue would not be affected and it would continue shipments of existing main power management integrated circuits (PMICs) to Apple. It expects to sell current and future generations of so-called sub-PMICs to Apple.

Bagherli said that Apple increasingly viewed main PMICs, which are central to the operation of its devices, as a strategic element that it wanted to control directly. This was not the case for sub-PMICs that manage features such as on-board cameras, he told Reuters.

A customer stands underneath an illuminated Apple logo as he looks out the window of the Apple store located in central Sydney, Australia, May 28, 2018. REUTERS/David Gray

After the deal, Dialog expects Apple to account for 35-40 percent of its total revenues in 2022. That is down from around 75 percent in the current year. Headcount will fall to 1,800.

The chipmaker also said it would begin a share buyback program for up to 10 percent of its stock following its next quarterly trading update. The $600 million windfall will add to Dialog’s already-healthy net cash position of $525 million, analysts said.

Other chip designers in Europe have struggled to manage their relationship with Apple due to its sheer scale. Britain’s Imagination Technologies ended up being sold to a Chinese-backed fund last year after losing Apple as a client.

“Dialog has bought itself much more than just time,” said Karsten Iltgen, an analyst at Bankhaus Lampe, which rates the stock ‘buy’. “Its Apple business has been clearly defined and put on a sound long-term footing.”

EUROPE PUSH

Half of the deal’s value, or about $300 million, is cash for the Dialog engineers and offices and the other $300 million is pre-payment to Dialog for supplying chips over the next three years, the companies said.

Dialog said it would continue to deliver chips to other customers, focusing on the automotive and internet-of-things markets, among others.

It forecast that its sub-PMIC business would achieve compound annual growth rates of 30-35 percent between 2018 and 2022. Its AMS, Connectivity and Automotive & Industrial business would grow at a 10-15 percent rate.

The deal represents an expansion of Apple’s chip design operations, which kicked into high gear in 2010 when the company released its first custom processor for the iPad and iPhone.

Apple is buying about 16 percent of Dialog’s workforce. Apple said these employees would stay in Europe and would report to Johny Srouji, the company’s senior vice president of hardware technologies who oversees Apple’s chip design efforts.

“Our relationship with Dialog goes all the way back to the early iPhones, and we look forward to continuing this long-standing relationship with them,” Srouji said. Apple has added around 20,000 employees in Europe since 2000. It already has a chip design centers in Munich, Germany, where it employs 1,000 staff, and St Albans, Britain. The deal will give Apple four more from Dialog, in Livorno in Italy, Swindon in Britain, and Nabern and Neuaubing in Germany.

The transaction is expected to close in the first half of 2019, subject to customary closings and regulator approvals, Dialog said. It expects annual operational savings of $35 million from the deal, but declined to give more detail on its financial impact ahead of an investor presentation on Nov. 1.

Dialog said Qatalyst Partners acted as its financial adviser and Linklaters as its legal counsel.