STEP-DOWN CONVERTER. TPS54329 Datasheet

TPS54329 CONVERTER. Datasheet pdf. Equivalent

TPS54329 Datasheet
Recommendation TPS54329 Datasheet
Part TPS54329
Description 3-A SYNCHRONOUS STEP-DOWN CONVERTER
Feature TPS54329; TPS54329 www.ti.com SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012 4.5V to 18V Input, 3-A SYNCHRO.
Manufacture etcTI
Datasheet
Download TPS54329 Datasheet





Texas Instruments TPS54329
TPS54329
www.ti.com
SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012
4.5V to 18V Input, 3-A SYNCHRONOUS STEP DOWN CONVERTER
Check for Samples: TPS54329
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
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.
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)
TPS54329DDA
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 is a trademark 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



Texas Instruments TPS54329
TPS54329
SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
TA
–40°C to 85°C
ORDERING INFORMATION(1)
PACKAGE(2) (3)
ORDERABLE PART NUMBER
DDA
TPS54329DDA
TPS54329DDAR
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)
VIN, EN
VBST
VBST (10 ns transient)
Input voltage range
VBST (vs SW)
VFB, SS
SW
SW (10 ns transient)
Output voltage range
VREG5
GND
Voltage from GND to thermal pad, Vdiff
Human Body Model (HBM)
Electrostatic discharge
Charged Device Model (CDM)
Operating junction temperature, TJ
Storage temperature, Tstg
VALUE
MIN MAX
–0.3 20
–0.3 26
–0.3 28
–0.3 6.5
–0.3 6.5
–2 20
–3 22
–0.3 6.5
–0.3 0.3
–0.2 0.2
2
500
–40 150
–55 150
UNIT
V
V
V
V
V
V
V
V
V
V
kV
V
°C
°C
(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
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
TPS54329
DDA (8 PINS)
42.1
50.9
31.8
5
13.5
7.1
UNITS
°C/W
2 Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS54329



Texas Instruments TPS54329
TPS54329
www.ti.com
SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
VIN Supply input voltage range
VI Input voltage range
VO Output voltage range
IO Output Current range
TA Operating free-air temperature
TJ Operating junction temperature
VBST
VBST (10 ns transient)
VBST(vs SW)
SS
EN
VFB
SW
SW (10 ns transient)
GND
VREG5
IVREG5
MIN MAX UNIT
4.5 18 V
–0.1 24
-0.1 27
–0.1 5.7
–0.1 5.7
–0.1 18 V
–0.1 5.5
–1.8 18
–3 21
–0.1 0.1
–0.1 5.7 V
0 10 mA
–40 85 °C
–40 150 °C
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SUPPLY CURRENT
IVIN
Operating - non-switching supply current
VIN current, TA = 25°C, EN = 5 V,
VFB = 0.8 V
IVINSDN
Shutdown supply current
VIN current, TA = 25°C, EN = 0 V
LOGIC THRESHOLD
VENH
EN high-level input voltage
VENL
EN low-level input voltage
REN EN pin resistance to GND
VFB VOLTAGE AND DISCHARGE RESISTANCE
VFBTH
VFB threshold voltage
IVFB VFB input current
VREG5 OUTPUT
VVREG5
VREG5 output voltage
IVREG5
Output current
MOSFET
RDS(on)h High side switch resistance
RDS(on)l
Low side switch resistance
CURRENT LIMIT
Iocl Current limit
EN
EN
VEN = 12 V
TA = 25°C, VO = 1.05 V, continuous mode
VFB = 0.8 V, TA = 25°C
TA = 25°C, 6.0 V < VIN < 18 V,
0 < IVREG5 < 5 mA
VIN = 6 V, VREG5 = 4.0 V, TA = 25°C(1)
25°C, VBST - SW = 5.5 V(1)
25°C (1)
L out = 1.5 μH(1)
(1) Not production tested.
MIN TYP MAX UNIT
800 1200
4.3 10
μA
μA
1.6 V
0.45 V
220 440 880 kΩ
749 765 781 mV
0 ±0.1 μA
5.5 V
60 mA
100 m
74 m
3.5 4.2 5.7 A
Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS54329
3





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