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PTH08T260W Datasheet(PDF) 5 Page - Texas Instruments

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No. de Pieza. PTH08T260W
Descripción  3-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans
Descarga  36 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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PTH08T260W Datasheet(HTML) 5 Page - Texas Instruments

 
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PTH08T260W, PTH08T261W
SLTS272A – DECEMBER 2006 – REVISED MAY 2007
ELECTRICAL CHARACTERISTICS (continued)
T
A =25°C, VI = 5V, VO = 3.3V, CI = 330µF, CO1 = 100µF ceramic, CO2 = 100µF, IO = IOmax (unless otherwise stated)
PARAMETER
TEST CONDITIONS
PTH08T260W
MIN
TYP
MAX
UNIT
fSYNC
Synchronization (SYNC) frequency
240
400
kHz
VSYNCH
SYNC High-Level Input Voltage
2
5.5
V
SmartSync Control
VSYNCL
SYNC Low-Level Input Voltage
0.8
V
tSYNC
SYNC Minimum Pulse Width
200
nSec
CI
External input capacitance
330 (7)
µF
Nonceramic
100 (8)
5000 (9)
Capacitance value
µF
without
Ceramic
100 (8)
500
TurboTrans
Equivalent series resistance (non-ceramic)
7
m
CO
External output capacitance
see table
10,000
Capacitance value
µF
with
(10)
(11)
Turbotrans
Capacitance
× ESR product (C
O× ESR)
1000
10,000
µF×mΩ
Per Telcordia SR-332, 50% stress,
MTBF
Reliability
6.7
106 Hr
TA = 40°C, ground benign
(7)
A 330 µF electrolytic input capacitor is required for proper operation. The capacitor 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. When operating at V
I > 8V, the
minimum required CI may be reduced to a 220-µF electrolytic plus a 22-µF ceramic.
(8)
100 µF ceramic & 100
µF non-ceramic external output capacitance is required for basic operation. The 100 µF required ceramic output
capacitance can be made up of 2
× 47 µF. 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.
5
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