Datasheet

PTH08T230W, PTH08T231W
SLTS265L –NOVEMBER 2005– REVISED AUGUST 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T
A
=25°C, V
I
= 5 V, V
O
= 3.3 V, C
I
= 330 µF, C
O
1 = 200 µF ceramic, and I
O
= I
O
max (unless otherwise stated)
PARAMETER TEST CONDITIONS PTH08T231W
MIN TYP MAX UNIT
C
I
External input capacitance 300
(7)
µF
without
Capacitance value Ceramic 200
(8)
5000 µF
TurboTrans
C
O
External output capacitance see table
Capacitance value Ceramic 5000
(10)
μF
with
(9)
Turbotrans
Capacitance × ESR product (C
O
× ESR) 100 1000 μF×mΩ
Per Telcordia SR-332, 50% stress,
MTBF Reliability 6.7
10
6
Hr
T
A
= 40°C, ground benign
(7) 300 µF of ceramic or 330 µF of electrolytic input capacitance is required for proper operation. Electrolytic capacitance must be rated for
a minimum of 450 mA rms of ripple current. An additional 22-μF ceramic input capacitor is recommended to reduce rms ripple current.
(8) 200 µF ceramic external output capacitance is required for basic operation. The required ceramic output capacitance can be made up of
2 × 100 µF or 4 × 47 µF. The minimum output capacitance requirement increases when TurboTrans™ (TT) technology is used. See the
Application Information for more guidance.
(9) 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 TurboTrans application notes for further guidance.
(10) This is the calaculated maximum when using the TurboTrans feature. Additionally, low ESR capacitors are required for proper operation.
See the TurboTrans application notes for further guidance.
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