PTH08000WAZT Datasheet, PDF (1/20 Pages) Texas Instruments – 2.25-A, WIDE INPUT, ADJUSTABLE SWITCHING REGULATOR WITH AUTO-TRACK SEQUENCING

www.ti.com
PTH08000W
SLTS248B – JUNE 2005 – REVISED FEBRUARY 2008
2.25-A, WIDE INPUT, ADJUSTABLE SWITCHING REGULATOR
WITH AUTO-TRACK™ SEQUENCING
FEATURES
1
•2 Up to 2.25-A Output Current at 85°C
• 4.5-V to 14-V Input Voltage Range
• Wide-Output Voltage Adjust
(0.9 V to 5.5 V)
• Efficiencies Up to 94%
• On/Off Inhibit
• Undervoltage Lockout (UVLO)
• Output Overcurrent Protection
(Nonlatching, Auto-Reset)
• Overtemperature Protection
• Ambient Temperature Range: –40°C to 85°C
• Surface-Mount Package
• Safety Agency Approvals:
UL/CUL 60950, EN60950
APPLICATIONS
• Telecommunications, Instrumentation,
and General-Purpose Circuits
DESCRIPTION
The PTH08000W is a highly integrated, low-cost switching regulator module that delivers up to 2.25 A of output
current. The PTH08000W sources output current at a much higher efficiency than a TO-220 linear regulator IC,
eliminating the need for a heatsink. The small size (0.75 inch × 0.5 inch) and flexible operation creates value for
a variety of applications.
The input voltage range of the PTH08000W is 4.5 V to 14 V, allowing operation from either a 5-V or 12-V input
bus. Using state-of-the-art switched-mode power-conversion technology, the PTH08000W can step down to
voltages as low as 0.9 V from a 5-V input bus, with less than 1 W of power dissipation. The output voltage can
be adjusted to any voltage over the range, 0.9 V to 5.5 V, using a single external resistor. This series includes
Auto-Track™ sequencing. This feature simplifies the task of supply voltage sequencing in a power system by
enabling modules to track each other, or any external voltage, during power up and power down. Operating
features include an undervoltage lockout (UVLO), on/off inhibit, overcurrent protection, and overtemperature
protection. Target applications include telecommunications, test and measurement applications, and high-end
consumer products. This product is available in both through-hole and surface-mount package options, including
tape and reel. The PTH08000W is compatible with TI's roadmap for RoHS and lead-free compliance.
STANDARD APPLICATION
Track
1
2
V_I
3
C_I*
100 µF
+
4
Inhibit
(Required)
GND
PTH08000W
(Top View)
R_SET#
1%, 0.05 W
(Required)
6
V_O
5
+ ^CO^*
100 µF
(Optional)
GND
* See the Application Information section for capacitor recommendations.
# See the Application Information section for R_SET values.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Auto-Track, POLA, TMS320 are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2008, Texas Instruments Incorporated