Datasheet

PTH08T250W
www.ti.com SLTS278G –NOVEMBER 2010–REVISED MARCH 2009
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see
the TI website at www.ti.com.
DATASHEET TABLE OF CONTENTS
DATASHEET SECTION PAGE NUMBER
ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS 3
ELECTRICAL CHARACTERISTICS TABLE (PTH08T250W) 4
TERMINAL FUNCTIONS 6
TYPICAL CHARACTERISTICS (V
I
= 12V) 7
TYPICAL CHARACTERISTICS (V
I
= 5V) 8
ADJUSTING THE OUTPUT VOLTAGE 9
INPUT & OUTPUT CAPACITOR RECOMMENDATIONS 11
TURBOTRANS™ INFORMATION 15
SOFT-START POWER-UP 19
REMOTE SENSE 19
OUTPUT INHIBIT 20
OVERCURRENT PROTECTION 20
OVER-TEMPERATURE PROTECTION 20
SYCHRONIZATION (SMARTSYNC) 21
AUTO-TRACK SEQUENCING 23
UNDERVOLTAGE LOCKOUT (UVLO) 26
CURRENT SHARING 27
CURRENT SHARING LAYOUT 30
PREBIAS START-UP 30
TAPE & REEL AND TRAY DRAWINGS 32
ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS
(Voltages are with respect to GND)
UNIT
V
track
Track pin voltage –0.3 to V
I
+ 0.3 V
T
A
Operating temperature range Over V
I
range –40 to 85
Surface temperature of module body or pins
T
wave
Wave soldering temperature AD suffix 260
(5 seconds maximum)
AS suffix 235
(1)
°C
T
reflow
Solder reflow temperature Surface temperature of module body or pins
AZ suffix 260
(1)
T
stg
Storage temperature Storage temperature of module removed from shipping package –55 to 125
T
pkg
Packaging temperature Shipping Tray or Tape and Reel storage or bake temperature 45
Mechanical shock Per Mil-STD-883D, Method 2002.3 1 msec, 1/2 AD suffix 500
sine, mounted
AS and AZ suffix 125 G
Mechanical vibration Mil-STD-883D, Method 2007.2 20-2000 Hz 20
Weight 16.7 grams
Flammability Meets UL94V-O
(1) During reflow of surface mount package version do not elevate peak temperature of the module, pins or internal components above the
stated maximum.
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