SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012
4.5V to 18V Input, 3-A SYNCHRONOUS STEP DOWN CONVERTER
Check for Samples:
1
FEATURES
•
D-CAP2™ Mode Enables Fast Transient
Response
Low Output Ripple and Allows Ceramic Output
Capacitor
Wide V
IN
Input Voltage Range: 4.5 V to 18 V
Output Voltage Range: 0.76 V to 7.0 V
Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 100 mΩ (High Side) and 74 mΩ (Low Side)
High Efficiency, Less Than 10
μA
at Shutdown
High Initial Bandgap Reference Accuracy
Adjustable Soft Start
Pre-Biased Soft Start
650-kHz Switching Frequency (f
SW
)
Cycle By Cycle Over Current Limit
DESCRIPTION
The TPS54329 is an adaptive on-time D-CAP2™
mode synchronous buck converter. TheTPS54329
enables system designers to complete the suite of
various end equipment’s power bus regulators with a
cost effective, low component count, low standby
current solution. The main control loop for the
TPS54329 uses the D-CAP2™ mode control which
provides a fast transient response with no external
compensation components. The TPS54329 also has
a proprietary circuit that enables the device to adopt
to both low equivalent series resistance (ESR) output
capacitors, such as POSCAP or SP-CAP, and ultra-
low ESR ceramic capacitors. The device operates
from 4.5-V to 18-V VIN input. The output voltage can
be programmed between 0.76 V and 7 V. The device
also features an adjustable soft start time. The
TPS54329 is available in the 8-pin DDA package,
and designed to operate from –40°C to 85°C.
23
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
•
Wide Range of Applications for Low Voltage
System
– Digital TV Power Supply
– High Definition Blu-ray Disc™ Players
– Networking Home Terminal
– Digital Set Top Box (STB)
V
OUT
(50 mV/div)
TPS54329DDA
I
OUT
(1 A/div)
100 μs/div
G006
1
2
3
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.
D-CAP2 is a trademark of Texas Instruments.
Blu-ray Disc is a trademark of Blu-ray Disc Association.
Copyright © 2011–2012, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
