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TPS54328 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS54328
Description  4.5V to 18V Input, 3-A Synchronous Step-Down SWIFT??Converter with Eco-Mode?
Download  21 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54328 Fiches technique(HTML) 1 Page - Texas Instruments

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V = 50 mV / div (-950 mV dc offset)
O
I = 1 A / div (0.75 to 2.25 A load step,
slew rate = 1 A / µsec)
O
Time = 50 µsec / div
TPS54328
www.ti.com
SLVSAN2 – NOVEMBER 2010
4.5V to 18V Input, 3-A Synchronous Step-Down SWIFT™ Converter with Eco-Mode™
Check for Samples: TPS54328
1
FEATURES
DESCRIPTION
23
D-CAP2™ Mode Enables Fast Transient
Response
The TPS54328 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54328
Low Output Ripple and Allows Ceramic Output
enables system designers to complete the suite of
Capacitor
various end-equipment power bus regulators with a
Wide VIN Input Voltage Range: 4.5 V to 18 V
cost effective, low component count, low standby
Output Voltage Range: 0.76 V to 7.0 V
current solution. The main control loop for the
TPS54328 uses the D-CAP2™ mode control that
Highly Efficient Integrated FETs Optimized
provides a fast transient response with no external
for Lower Duty Cycle Applications
compensation components. The adaptive on-time
– 100 m
Ω (High Side) and 70 mΩ (Low Side)
control supports seamless transition between PWM
High Efficiency, less than 10 mA at shutdown
mode at higher load conditions and Eco-mode™
High Initial Bandgap Reference Accuracy
operation at light loads. Eco-mode™ allows the
TPS54328 to maintain high efficiency during lighter
Adjustable Soft Start
load conditions. The TPS54328 also has a proprietary
Pre-Biased Soft Start
circuit that enables the device to adopt to both low
700-kHz Switching Frequency (fSW)
equivalent series resistance (ESR) output capacitors,
such as POSCAP or SP-CAP, and ultra-low ESR
Cycle By Cycle Over Current Limit
ceramic capacitors. The device operates from 4.5-V
Auto-Skip Eco-mode™ for High Efficiency at
to 18-V VIN input. The output voltage can be
Light Load
programmed between 0.76 V and 7.0 V. The device
also features an adjustable soft start time. The
APPLICATIONS
TPS54328 is available in the 8-pin DDA package,
Wide Range of Applications for Low Voltage
and designed to operate from –40°C to 85°C.
System
Digital TV Power Supply
High Definition Blu-ray Disc™ Players
Networking Home Terminal
Digital Set Top Box (STB)
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.
2
D-CAP2, Eco-mode are trademarks of Texas Instruments.
3
Blu-ray Disc is a trademark of Blu-ray Disc Association.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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