AOS Semiconductor Product Reliability Report AOL1454, rev A Plastic Encapsulated Device ALPHA & OMEGA Semiconductor, Inc www.aosmd.com This AOS product reliability report summarizes the qualification result for AOL1454. Accelerated environmental tests are performed on a specific sample size, and then followed by electrical test at end point. Review of final electrical test result confirms that AOL1454 passes AOS quality and reliability requirements. The released product will be categorized by the process family and be monitored on a quarterly basis for continuously improving the product quality. Table of Contents: I. II. III. IV. Product Description Package and Die information Environmental Stress Test Summary and Result Reliability Evaluation I. Product Description: The AOL1454 uses advanced trench technology to provide excellent RDS(ON), low gate charge. It is ESD protected. This device is suitable for use as a low side switch in SMPS and general purpose applications. -RoHS Compliant -Halogen and Antimony Free Green Device Detailed information refers to datasheet. II. Die / Package Information: AOL1454 Standard sub-micron Low voltage N channel TM Package Type Ultra SO8 Lead Frame Copper Die Attach Soft solder Bonding Wire Al & Au wire Mold Material Epoxy resin with silica filler MSL (moisture sensitive level) Level 1 based on J-STD-020 Process Note * based on information provided by assembler and mold compound supplier III. Result of Reliability Stress for AOL1454 Test Item Test Condition Time Point Lot Attribution Total Sample size Number of Failures MSL Precondition 168hr 85°c /85%RH +3 cycle reflow@260°c HTGB - 3 lots 495pcs 0 JESD22A113 Temp = 150 °c, Vgs=100% of Vgsmax 168hrs 500 hrs 1000 hrs 77pcs 0 1 lot JESD22A108 Temp = 150 °c, Vds=80% of Vdsmax 168hrs 500 hrs 1000 hrs 77pcs / lot 77pcs 0 JESD22A108 130 +/- 2°°c, 85%RH, 33.3 psi, Vgs = 100% of Vgs max 121°°c, 29.7psi, RH=100% 100 hrs (Note A*) 3 lots 77pcs / lot 165pcs 0 JESD22A110 96 hrs (Note A*) 3 lots 55pcs / lot 165pcs 0 JESD22A102 -65°°c to 150°°c, air to air 250 / 500 cycles (Note A*) 3 lots 55pcs / lot 165pcs 0 JESD22A104 (Note A*) 55pcs / lot (Note A*) HTRB HAST Pressure Pot Temperature Cycle 1 lot Standard Note A: The reliability data presents total of available generic data up to the published date. IV. Reliability Evaluation FIT rate (per billion): 46 MTTF = 2478 years The presentation of FIT rate for the individual product reliability is restricted by the actual burn-in sample size of the selected product (AOL1454). Failure Rate Determination is based on JEDEC Standard JESD 85. FIT means one failure per billion hours. 2 9 9 Failure Rate = Chi x 10 / [2 (N) (H) (Af)] = 1.83 x 10 9 7 MTTF = 10 / FIT = 2.17 x 10 hrs = 2478 years / [2x2x77x500x258] = 46 Chi² = Chi Squared Distribution, determined by the number of failures and confidence interval N = Total Number of units from HTRB and HTGB tests H = Duration of HTRB/HTGB testing Af = Acceleration Factor from Test to Use Conditions (Ea = 0.7eV and Tuse = 55°C) Acceleration Factor [Af] = Exp [Ea / k (1/Tj u – 1/Tj s)] Acceleration Factor ratio list: Af 55 deg C 70 deg C 85 deg C 100 deg C 115 deg C 130 deg C 150 deg C 258 87 32 13 5.64 2.59 1 Tj s = Stressed junction temperature in degree (Kelvin), K = C+273.16 Tj u = The use junction temperature in degree (Kelvin), K = C+273.16 -5 K = Boltzmann’s constant, 8.617164 x 10 eV / K