May 2013

Inphi Corporate UpdateJefferies 2013 Global TMT ConferenceJohn Edmunds CFO

2Inphi Proprietary and Confidential 2Inphi Proprietary and Confidential

Safe Harbor Summary

This presentation includes forward-looking statements relating to matters that are not historical facts, including, without limitation, statements regarding Inphi’s short and long term growth strategies, trends in IP traffic and technology adoption, the future sizes and anticipated growth of the networking infrastructure, cloud computing and data center markets, and the scaling of memory capacity with CPU cores. In some cases, such forward-looking statements are identified by words such as “anticipate,” “believe,” “plan,” “estimate,” “expect,” “strive,” “future,” “intend” and similar expressions. Although Inphi’s management believes that the expectations reflected in the forward-looking statements are reasonable, such statements involve known and unknown risks, uncertainties and other factors that may cause Inphi’s actual results to be different from any future results expressed or implied by these statements, including the risks and uncertainties described in the prospectus relating to the offering. We caution you that no forward-looking statement is a guarantee of future performance, and you should not place undue reliance on these forward-looking statements which reflect the view of Inphi’s management only as of the date of this presentation. We assume no obligation to, and expressly disclaim any obligation to, update any forward-looking statements contained in this presentation as a result of new information or future events or developments.

3Inphi Proprietary and Confidential 3Inphi Proprietary and Confidential

Growing Processor – Interconnect Gap

MOORE’S LAWProcessor Bandwidth

Interconnect Bandwidth

100x in 10 Years

15x in 10 Years

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…For Inphi to Address Layer 1 Interconnect Bandwidth

Optical Fiber

Optical Fiber

CPU to Memory

RDIMMLRDIMMMemory

RDIMMLRDIMMMemory

Register

Buffer

Network to CPU

CDR

SerDes

Optics to Network

High-Speed Data Transport and Signal Integrity

Amplifier

Driver

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Better Signal Detection

Better Signal Detection

Faster Throughput

Faster Throughput

Longer DistanceLonger

DistanceImproved

Error MarginImproved

Error MarginHigh Signal

IntegrityHigh Signal

Integrity

Signal With Integrity

Competitive Solution Inphi Solution

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…For Tier 1 Customers in Mission Critical Applications

Optics to Network Network to CPU CPU to Memory

Long Haul, Metro, Data Center and Cloud

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…Serving Multiple Product Cycles

Optics to Network Network to CPU CPU to Memory

Investing for Growth

2012

2014

2013

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201520142H’131H’132012

…Resulting in Growth Drivers Every Year

BackplaneLine CardCFP2Network toCPU CFP

DriverGen1 TIAOptics toNetwork Gen2 TIA

100G Metro 400G

DDR4IvyBridgeRomleyCPU to Memory Future

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Optics Interconnect Trends

Reconfigurable Colorless Networks Long Haul: Higher Bandwidth 400G

Metro: Low Power 100G Coherent

80W 32W

CFP CFP2 CFP4

12W6W

Data Centers: Low Power 100G Ethernet

12W8W

5W

CFP CFP2 CFP4

100G coherent will dominate network build out Complex modulation formats such as 16QAM

require Quad Linear Drivers

Higher density, lower cost, lower power for switches

Higher density, lower cost, lower power for core routers

10Inphi Proprietary and Confidential 10Inphi Proprietary and Confidential

LRDiMM advantage on Ivy Bridge

11Inphi Proprietary and Confidential

Still a $ 350 - $ 500 Premium - 32GB DiMM card vs (2)16’s

� May’12 -> $4100; June’12 -> $2099; Oct ‘ 12 -> $1599; Feb ’13 -> $1,399

� Projected in 6 months - > $600

(With 20% discount)= $ 250 (With 20%-30% discount) $ $850- $1000

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Today’s Investments Drive Long Term Model*

15%

32%

20%

65%

($MM) 2010 2011

12%

25%

22%

65%

Operating Margin

Effective Tax Rate

SG&A

Gross Margin

2012

7%

37%

21%

30% 32%R&D 37%

65%

$22 $25

20-22%

20%

12-14%

60-64%

LT Model

27-29%

--AggregateR&D Spend $34**

* Excludes stock-based compensation** Annual based on 12 months ended 12/31/12, excludes stock-based compensation

12

Thank you.