Datasheet
DATASHEET TABLE OF CONTENTS
ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS
PTH08T255W
www.ti.com
........................................................................................................................................................................................... SLTS290 – NOVEMBER 2008
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 SECTION PAGE NUMBER
ENVIRONMENTAL AND ABSOLUTE MAXIMUM RATINGS 3
ELECTRICAL CHARACTERISTICS TABLE (PTH08T255W) 4
TERMINAL FUNCTIONS 6
TYPICAL CHARACTERISTICS (V
I
= 12V) 7
ADJUSTING THE OUTPUT VOLTAGE 8
INPUT & OUTPUT CAPACITOR RECOMMENDATIONS 9
TURBOTRANS™ INFORMATION 13
SOFT-START POWER-UP 17
REMOTE SENSE 17
OUTPUT INHIBIT 18
OVERCURRENT PROTECTION 18
OVER-TEMPERATURE PROTECTION 18
SYCHRONIZATION (SMARTSYNC) 19
AUTO-TRACK SEQUENCING 20
UNDERVOLTAGE LOCKOUT (UVLO) 23
CURRENT SHARING 24
CURRENT SHARING SOA GRAPHS 26
CURRENT SHARING LAYOUT 27
PREBIAS START-UP 27
TAPE & REEL AND SHIPPING TRAY DRAWING 29
(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.
Copyright © 2008, Texas Instruments Incorporated 3
Product Folder Link(s): PTH08T255W