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TPS54329E Datasheet Preview

TPS54329E Datasheet

3-A SYNCHRONOUS STEP DOWN CONVERTER

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www.ti.com
TPS54329E
SLVSAZ5A – SEPTEMBER 2011 – REVISED MARCH 2012
4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-Mode™
Check for Samples: TPS54329E
FEATURES
1
23 D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide VIN 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 m(High Side) and 74 m(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 (fSW)
• Cycle By Cycle Over Current Limit
• Auto-Skip Eco-mode™ for High Efficiency at
Light Load
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)
DESCRIPTION
The TPS54329E is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54329E
enables system designers to complete the suite of
various end-equipment power bus regulators with a
cost effective, low component count, low standby
current solution. The main control loop for the
TPS54329E uses the D-CAP2™ mode control that
provides a fast transient response with no external
compensation components. The adaptive on-time
control supports seamless transition between PWM
mode at higher load conditions and Eco-mode™
operation at light loads. Eco-mode™ allows the
TPS54329E to maintain high efficiency during lighter
load conditions. The TPS54329E 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
TPS54329E is available in the 8-pin DDA package,
and designed to operate from –40°C to 85°C.
TPS54329EDDA
VOUT (50 mV/div)
IOUT (1 A/div)
100 μs/div
G006
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.
D-CAP2, Eco-mode are trademarks of Texas Instruments.
2
Blu-ray Disc is a trademark of Blu-ray Disc Association.
3
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 © 2011–2012, Texas Instruments Incorporated




etcTI

TPS54329E Datasheet Preview

TPS54329E Datasheet

3-A SYNCHRONOUS STEP DOWN CONVERTER

No Preview Available !

TPS54329E
SLVSAZ5A – SEPTEMBER 2011 – REVISED MARCH 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TA
–40°C to 85°C
ORDERING INFORMATION(1)
PACKAGE(2) (3)
ORDERABLE PART NUMBER
DDA
TPS54329EDDA
TPS54329EDDAR
PIN
8
TRANSPORT
MEDIA
Tube
Tape and Reel
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(3) All package options have Cu NIPDAU lead/ball finish.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
VALUE
MIN MAX
UNIT
VIN, EN
–0.3 20
VBST
–0.3 26
VBST (10 ns transient)
–0.3 28
Input voltage range
VBST (vs SW)
–0.3 6.5 V
VFB, SS
–0.3 6.5
SW –2 20
SW (10 ns transient)
–3 22
Output voltage range
VREG5
GND
–0.3 6.5
V
–0.3 0.3
Voltage from GND to thermal pad, Vdiff
Electrostatic discharge
Human Body Model (HBM)
Charged Device Model (CDM)
–0.2 0.2 V
2 kV
500 V
Operating junction temperature, TJ
Storage temperature, Tstg
–40 150
°C
–55 150
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL INFORMATION
THERMAL METRIC(1)
θJA
θJCtop
θJB
ψJT
ψJB
θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
TPS54329E
DDA (8 PINS)
42.1
50.9
31.8
5
13.5
7.1
UNITS
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2 Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s) :TPS54329E


Part Number TPS54329E
Description 3-A SYNCHRONOUS STEP DOWN CONVERTER
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