SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in

one

reportable segment that includes the design, development, marketing and sale of high-performance analog solutions for the consumer, computing and storage, industrial, automotive and communications markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company derives a majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to locations.

The Company sells its products primarily through

third

-party distributors and value-added resellers, and directly to original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. The following table summarizes those customers with sales equal to or greater than

10%

of the Company's total revenue, or with accounts receivable balances greater than

10%

of the Company’s total accounts receivable:

	Revenue												Accounts Receivable
	Three Months Ended September 30,						Nine Months Ended September 30,						September 30,			December 31,
Customer	2018			2017			2018			2017			2018			2017
A (distributor)		23	%		17	%		21	%		17	%		21	%		16	%
B (distributor)		10	%		15	%		10	%		*			16	%		*
C (value-added reseller)		*			*			*			*			*			15	%

__________________

* Represents less than

10%.

The Company’s agreements with these

third

-party distributors and value-added reseller were made in the ordinary course of business and

may

be terminated with or without cause by these customers with advance notice. Although the Company

may

experience a short-term disruption in the distribution of its products and a short-term decline in revenue if its agreement with any of these customers was terminated, the Company believes that such termination would

not

have a material adverse effect on its financial statements because it would be able to engage alternative distributors, resellers and other distribution channels to deliver its products to end customers within a short period following the termination of the agreement with the customer.

The following is a summary of revenue by geographic regions (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Country or Region	2018		2017		2018		2017
China	$	91,509	$	66,645	$	245,580	$	185,054
Taiwan		20,774		27,387		55,315		59,548
Europe		12,579		10,726		36,696		28,227
Korea		11,406		9,279		30,046		25,594
Southeast Asia		11,259		7,179		28,261		20,476
Japan		6,895		4,813		18,994		14,584
United States		5,375		2,781		13,404		7,711
Other		178		129		589		305
Total	$	159,975	$	128,939	$	428,885	$	341,499

The following is a summary of revenue by product family (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Product Family	2018		2017		2018		2017
DC to DC	$	147,727	$	119,089	$	394,492	$	312,700
Lighting Control		12,248		9,850		34,393		28,799
Total	$	159,975	$	128,939	$	428,885	$	341,499

The following is a summary of long-lived assets by geographic regions (in thousands):

	September 30,		December 31,
Country	2018		2017
China	$	92,066	$	89,472
United States		68,014		65,618
Taiwan		17,033		17,238
Bermuda		6,879		7,522
Other		810		388
Total	$	184,802	$	180,238