Datasheet
PTH04T260W , PTH04T261W
www.ti.com
.................................................................................................................................................. SLTS273E – SEPTEMBER 2006 – REVISED JULY 2009
ELECTRICAL CHARACTERISTICS (continued)
PTH04T260W
T
A
=25 ° C, V
I
= 5 V, V
O
= 3.3 V, C
I
= 330 µ F, C
O
1 = 100 µ F ceramic, C
O
2 = 150 µ F non-ceramic, and I
O
= I
O
max (unless
otherwise stated)
PARAMETER TEST CONDITIONS PTH04T260W UNIT
MIN TYP MAX
V
SYNCL
SYNC Low-Level Input Voltage 0.8 V
t
SYNC
SYNC Minimum Pulse Width 200 ns
C
I
External input capacitance 330
(7)
µ F
Nonceramic 150
(8)
5000
(9)
Capacitance value µ F
without
Ceramic 100
(8)
500
TurboTrans
Equivalent series resistance (non-ceramic) 7 m Ω
C
O
External output capacitance
see table
Capacitance value 5,000
(11)
µ F
with
(10)
Turbotrans
Capacitance × ESR product (C
O
× ESR) 1000 10,000 µ F × m Ω
Per Telcordia SR-332, 50% stress,
MTBF Reliability 5.6
10
6
Hr
T
A
= 40 ° C, ground benign
(7) A 330 µ F input capacitor is required for proper operation. The capacitor must be rated for a minimum of 400 mA rms of ripple current.
An additional 22- µ F ceramic input capacitor is recommended to reduce rms ripple current.
(8) 100 µ F ceramic and 150 F non-ceramic external output capacitance is required for basic operation. The minimum output capacitance
requirement increases when TurboTrans™ (TT) technology is used. See the Application Information for more guidance.
(9) This is the calculated maximum disregarding TurboTrans™ technology. When the TurboTrans feature is used, the minimum output
capacitance must be increased. See the TurboTrans application notes for further guidance.
(10) 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.
(11) 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.
Copyright © 2006 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): PTH04T260W PTH04T261W