Datasheet
PTH08T240W , PTH08T241W
www.ti.com
................................................................................................................................................... SLTS264J – NOVEMBER 2005 – REVISED JUNE 2009
ELECTRICAL CHARACTERISTICS (continued)
PTH08T240W
T
A
= 25 ° C, V
I
= 5 V, V
O
= 3.3 V, C
I
= 220 µ F, C
O
= 220 µ F, and I
O
= I
O
max (unless otherwise stated)
PARAMETER TEST CONDITIONS PTH08T240W UNIT
MIN TYP MAX
Nonceramic 220
(5)
C
I
External input capacitance µ F
Ceramic 22
(5)
Nonceramic 220
(6)
5000
(7)
Capacitance Value µ F
w/o TurboTrans Ceramic 500
Equivalent series resistance (non-ceramic) 7 m Ω
C
O
External output capacitance
see table
Capacitance Value µ F
(6) (8)
w/ TurboTrans
Capacitance × ESR product (C
O
× ESR) 1000 10000
(8)
µ F × m Ω
Per Telcordia SR-332, 50% stress,
MTBF Reliability 6.1
10
6
Hr
T
A
= 40 ° C, ground benign
(5) A 220 µ F electrolytic input capacitor is required for proper operation. The electrolytic capacitor must be rated for a minimum of 500 mA
rms of ripple current.
(6) For V
O
≤ 3.45V, a 220 µ F external output capacitor is required for basic operation. When V
O
> 3.45V the minimum output capacitance
increase to 330 µ F. The minimum output capacitance requirement increases when TurboTrans™ (TT) technology is utilized. See related
Application Information for more guidance.
(7) This is the calculated maximum disregarding TurboTrans™ technology. When the TurboTrans™ feature is utilized, the minimum output
capacitance must be increased.
(8) When using TurboTrans™ technology, a minimum value of output capacitance is required for proper operation. Additionally, low ESR
capacitors are required for proper operation. See the application notes for further guidance.
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