REL-1283-G-B Reliability Report for AME5250 Series Product Approved by Prepared by Arthur Rong Jess Lin Quality & Reliability Dept. Director Quality & Reliability Dept. Supervisor Conclusion: The AME5250 series product has successfully met AME’s reliability standard that is required on all AME, Inc products. Furthermore, QRA Dept. of AME, Inc monitors the reliability continuously to make sure that all AME5250 series product will still meet AME’s reliability standard in the future. Table of Contents: Ⅰ、General Description Ⅱ、Product Information Ⅲ、Failures In Time Calculation Ⅳ、Product Reliability Test Result Ⅴ、Package Reliability Test Result Ⅵ、IR-reflow Test Result Ⅰ、General Description: The AME5250 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the AME5250 is ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Under light load conditions, the AME5250 operates in a power saving mode that consumes just around 20µA of supply current, maximizing battery life in portable applications. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The AME5250 is available in small DFN-6D & QFN-16C packages. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection. Ⅱ、Product Information: Ⅲ、Failures In Time Calculation: Use HTOL test information mentioned in sectionⅣ, FIT (Failures In Time) can be calculated as below: FIT = ( x 2 (ν , CL ) × 10 9 ) /( 2 × S × H × AF ) = ( 4 .61 × 10 9 ) /( 2 × 77 × 1000 × 280 .59 ) =106.69 (pieces per 109 hours) @ 40℃ with 90% Confidence Level. Where AF is acceleration factor setting activation energy to 1.0eV as zero failure. Ⅳ、Product Reliability Test Result: Test Item HTOL Test Condition Precondition NOTE 1 Sample Size / Failures Result 77 pcs / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass 3 pcs package pair / 0 pcs Pass 3 pcs per pin pair / 0 pcs Pass TSTRESS=125℃ Duration=1000hrs Biased, Read at 168/504/1000 hours ESD Human Body Model Pin-to-Pin test Class 2, 2kV minimum Machine Model Pin-to-Pin test Class B, 200V minimum Charged Device Model Class II, 200V minimum Latch-up Level A, 100mA minimum NOTE 1: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 260℃ Ⅴ、Package Reliability Test Result: Test Item Test Condition Sample Size / Failures Result MSL 85/85 168 hours 22 pcs / 0 pcs Level 1 77 pcs / 0 pcs Pass 77 pcs / 0 pcs Pass 77 pcs / 0 pcs Pass 77 pcs / 0 pcs Pass 5 pcs / 0 pcs Pass IR-reflow 3 cycles Peak Temp.= 260℃ IPC/JEDEC J-STD-020C HTS Precondition NOTE 2 Temp.=150℃ Duration=1000 hours Unbiased, Read at 1000 hours THT Precondition NOTE 2 Temp.=85℃, R.H.=85% Duration=1000 hours Unbiased, Read at 1000 hours PCT Precondition NOTE 2 Temp.=121℃, R.H.=100% 15PSIG, Unbiased Duration=168 hours Read at 168 hours TCT Precondition NOTE 2 -65℃ ~ 150℃ 500 cycles Unbiased, Read at 500 cycles Solderability Temp.=260℃ (lead-free) Duration=5sec NOTE 2: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 260℃ Ⅵ、IR-reflow Test Result: Test Item Test Condition Sample Size / Failures Result IR-reflow See IR reflow Profile 22 pcs / 0 pcs Pass Perform 3 cycles test IR reflow Profile: Profile Feature Average Ramp-Up Rate (Tsmax to Tp) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (tsmin to tsmax) Time maintained above - Temperature (TL) - Time (tL) Peak/Classification Temperature (Tp) Time within 5℃ of actual Peak Temperature (tp) Ramp-Down Rate Time 25℃ to Peak Temperature Pb-Free Assembly 3℃/second max. 150℃ 200℃ 60~180 seconds 217℃ 60~150 seconds 260℃ 20~40 seconds 6℃/second max. 8 minutes max.