AME5250A

Reliability Report
for
AME5250A Cu Wire Series Product
______________________________________________________________________
Prepared by Jess Lin, Supervisor of Quality & Reliability Dept.
Approved by Amy Shen, Manager of Production Management Dept.
REL-AME5250A-Cu-A
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
REL-AME5250A-Cu-A
Ⅰ、General Description:
The AME5250A 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.
Supply current with no load is 400µA and drops to<1µA in shutdown.The 2.5V to 5.5V input Voltage
range makes the AME5250A ideally suited for single Li-Ion batterypowered applications. 100% duty cycle
provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode
operation provides very low output ripple voltage for noise sensitive applications. At very light load, the
AME5250A will automatically skip pulses in pulse skip mode operation to maintain output regulation.
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 AME5250A
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.
REL-AME5250A-Cu-A
Ⅱ、Product Information:
Pin Configuration &
Special Feature
A
(DFN-6D)
A
(QFN-16C)
1. NC
2. EN
3. IN
4. SW
5. GND
6. FB/OUT
Package Type
V: DFN
W: QFN
Number of Pins
Y: 6
E: 16
Output Voltage
100: 1.0V
120: 1.2V
150: 1.5V
160: 1.6V
180: 1.8V
250:2.5V
330:3.3V
ADJ: Adjustable
1. GND
2. GND
3. GND
4. FB/OUT
5. GND
6. NC
7. EN
8. NC
9. IN
10. IN
11. IN
12. IN
13. SW
14. SW
15. SW
16. NC
REL-AME5250A-Cu-A
Ⅲ、Failures In Time Calculation:
Use HTOL test information mentioned in section
FIT = ( x 2 (ν ,
CL )
Ⅳ, FIT (Failures In Time) can be calculated as below:
× 10 9 ) /( 2 × S × H × AF ) = ( 4 .61 × 10 9 ) /( 2 × 45 × 1000 × 280 .59 )
9
=182.36 (pieces per 10 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
Test Condition
Sample Size / Failures
Result
HTOL
TSTRESS=125
45 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
℃
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
REL-AME5250A-Cu-A
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
Temp.=150
NOTE 1
℃
Duration=1000 hours
Unbiased, Read at
1000 hours
THT
Precondition
NOTE 1
℃
Temp.=85 , R.H.=85%
Duration=1000 hours
Unbiased,
Read at 1000 hours
PCT
Precondition
Temp.=121
NOTE 1
℃, R.H.=100%
15PSIG, Unbiased
Duration=168 hours
Read at 168 hours
TCT
Precondition
-65
NOTE 1
℃ ~ 150℃
500 cycles Unbiased,
Read at 500 cycles
Solderability
Temp.=260
℃ (lead-free)
Duration=5sec
NOTE 1: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 260
℃
REL-AME5250A-Cu-A
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
C
C
Sn-Pb Eutectic Assembly
Pb-Free Assembly
3° /second max.
3° /second max.
C
C
C
100°
150°
60~120 seconds
C
C
C
C
C
150°
200°
60~180 seconds
C
C
183°
60~150 seconds
245°
217°
60~150 seconds
260°
10~30 seconds
20~40 seconds
C
6° /second max.
6 minutes max.
C
6° /second max.
8 minutes max.
REL-AME5250A-Cu-A
The 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 product
will still meet AME’s reliability standard in the future.
REL-AME5250A-Cu-A