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TPS54325-Q1 Datasheet Preview

TPS54325-Q1 Datasheet

3-A Output Synchronous Step Down Switcher

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www.ti.com
TPS54325-Q1
SLVSAT1 JUNE 2011
4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER
WITH INTEGRATED FET ( SWIFT)
Check for Samples: TPS54325-Q1
FEATURES
1
23 Qualified for Automotive Applications
D-CAP2Mode Enables Fast Transient
Response
Low Output Ripple and Allows Ceramic Output
Capacitor
Wide VCC Input Voltage Range: 4.5 V to 18 V
Wide VIN Input Voltage Range: 2.0 V to 18 V
Output Voltage Range: 0.76 V to 5.5 V
Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
120 m(High Side) and 70 m(Low Side)
High Efficiency, less than 10 μA at shutdown
High Initial Bandgap Reference Accuracy
Adjustable Soft Start
Pre-Biased Soft Start
700-kHz Switching Frequency (fSW)
Cycle By Cycle Over Current Limit
Power Good Output
APPLICATIONS
Wide Range of Applications for Low Voltage
System
Digital TV Power Supply
High Definition Blue-ray DiscPlayers
Networking Home Terminal
Digital Set Top Box (STB)
DESCRIPTION
The TPS54325-Q1 is an adaptive on-time D-CAP2mode synchronous buck converter. The TPS54325-Q1
enables system designers to complete the suite of various end equipments power bus regulators with a cost
effective, low component count, low standby current solution. The main control loop for the TPS54325-Q1 uses
the D-CAP2mode control which provides a very fast transient response with no external components. The
TPS54325-Q1 also has a proprietary circuit that enables the device to adapt 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 VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The
output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable slow start
time and a power good function. The TPS54325-Q1 is available in the 14 pin HTSSOP package, and designed to
operate from 40°C to 105°C.
VOUT (50 mV / div)
100 µs / div
IOUT (2 A / div)
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.
SWIFT, D-CAP2, PowerPAD are trademarks of Texas Instruments.
2
Blue-ray Disc is a trademark of Blu-ray Disc.
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, Texas Instruments Incorporated




etcTI

TPS54325-Q1 Datasheet Preview

TPS54325-Q1 Datasheet

3-A Output Synchronous Step Down Switcher

No Preview Available !

TPS54325-Q1
SLVSAT1 JUNE 2011
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 105°C
ORDERING INFORMATION(1)
PACKAGE (2)
ORDERABLE PART NUMBER
PowerPAD
(HTSSOP) PWP
Reel of 2000
TPS54325TPWPRQ1
TOP-SIDE MARKING
54325Q1
(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.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted) (1)
VALUE
UNIT
VI Input voltage range
VIN, VCC, EN
VBST
VBST (vs SW1, SW2)
VFB, VO, SS, PG
SW1, SW2
0.3 to 20
0.3 to 26
0.3 to 6.5
0.3 to 6.5
2 to 20
V
V
V
V
V
SW1, SW2 (10 ns transient)
3 to 20
V
VO Output voltage range
Vdiff Voltage from GND to POWERPAD
ESD rating Electrostatic discharge
VREG5
PGND1, PGND2
Human Body Model (HBM)
Charged Device Model (CDM)
0.3 to 6.5
0.3 to 0.3
0.2 to 0.2
2
1000
V
V
V
kV
V
TJ Operating junction temperature
Tstg Storage temperature
40 to 150
55 to 150
°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(1)
TPS54325-Q1
PWP
UNITS
14 PINS
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
46.3
1.7
31.1
°C/W
36.6
7.2
31.4
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2 Copyright © 2011, Texas Instruments Incorporated


Part Number TPS54325-Q1
Description 3-A Output Synchronous Step Down Switcher
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