Datasheet
PTH12040W
SLTS237G – DECEMBER 2004 – REVISED MARCH 2009 ...............................................................................................................................................
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ELECTRICAL CHARACTERISTICS (continued)
T
A
= 25 ° C, V
I
= 12 V, V
O
= 3.3 V, C
I
= 1000 µ F, C
O
= 660 µ F, and I
O
= I
O
max (unless otherwise stated)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Nonceramic 660
(9)
14000
(10)
Capacitance value µ F
C
O
External output capacitance Ceramic 400
Equivalent series resistance (non-ceramic) 2
(11)
m Ω
2.5
MTBF Reliability Per Bellcore TR-332 50% stress, T
A
= 40 ° C, ground benigh
10
6
Hrs
(9) A minimum value of output capacitance is required for proper operation. Adding additional capacitance at the load further improves
transient response.
(10) This is the calculated maximum. The minimum ESR requirement often results in a lower value. See the Application Information section
for further guidance.
(11) This is the typcial ESR for all the electrolytic (nonceramic) output capacitance. Use 4 m Ω as the minimum when using max-ESR values
to calculate.
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