AME5250

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.