TPS54334 Converter Datasheet

TPS54334 Datasheet PDF, Equivalent


Part Number

TPS54334

Description

3-A Output Current Synchronous Step-Down Voltage Converter

Manufacture

etcTI

Total Page 30 Pages
PDF Download
Download TPS54334 Datasheet PDF


TPS54334
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS54334
SLUSC26A – MAY 2015 – REVISED FEBRUARY 2016
TPS54334 4.2-V to 28-V Input Voltage, 3-A Output Current Synchronous
Step-Down Voltage Converter
1 Features
1 Two 128mΩ/84mΩ MOSFETs for 3A Continuous
Output Current
• Power Good
• Low 2 µA Shutdown Quiescent Current
• 0.8 V Internal Voltage Reference with ±1.5%
Accuracy Over Temperature
• Fixed-Frequency Current Mode Control
• Pulse Skipping Boosts Efficiency at Light Loads
• Overcurrent Protection for Both MOSFETs with
Hiccup Mode for Severe Fault Conditions
• Thermal and Overvoltage Transient Protection
• Available in Easy-to-Use 8-Pin SOIC
PowerPAD™ and 10-Pin SON
• Monotonic Start-Up into Pre-biased Outputs
2 Applications
• Consumer Applications such as a Digital TV
(DTV), Set Top Box (STB, DVD/Blu-ray Player),
LCD Display, CPE (Cable Modem, WiFi Router),
DLP Projectors, Smart Meters
• Battery Chargers
• Industrial and Car Audio Power Supplies
• 5V,12 and 24V Distributed Power Bus Supply
3 Description
The TPS54334 is a 28-V, 3-A, low quiescent supply
current (IQ), synchronous monolithic buck converter
with integrated MOSFETs.
The TPS54334 enables small designs by integrating
the MOSFETs and implementing current mode
control to reduce external component count.
Efficiency is maximized through the integrated
128m/84mMOSFETs, low quiescent supply
current and pulse skipping at light loads. Using the
enable pin, shutdown supply current is reduced to
2 µA by entering a shutdown mode.
The TPS54334 provides accurate regulation for a
variety of loads with an accurate 1.5% voltage
reference over temperature.
Cycle by cycle current limiting on the high-side fet
protects the TPS54334 in overload situations and is
enhanced by a low-side sourcing current limit which
prevents current runaway. There is also a low-side
sinking current limit which turns off the low-side
MOSFET to prevent excessive reverse current.
Hiccup protection will be triggered if the overcurrent
condition has persisted for longer than the preset
time. Thermal hiccup protection disables the part
when die temperature exceeds thermal shutdown
temperature and enables the part again after the
built-in thermal hiccup time.
PART NUMBER
TPS54334
Device Information(1)
PACKAGE
BODY SIZE (NOM)
SO (8 Pin)
4.89 mm × 3.90 mm
VSON (10 Pin)
3.0 mm × 3.0 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
VIN=4.2 V to 24 V
VIN
R1
C1 C2 221 kΩ
10µF 0.1µF
R2
84.5 kΩ
C5
150 pF
Simplified Schematic
R3
2.05 kΩ
C4
0.015 µF
U1
TPS54334DRC
1 VIN
10
PGOOD
BOOT 9
R7 100 kΩ
VDD
C3 L1 6.8 µH
8 EN
0.1 µF
SW 2
7 COMP
VSENSE 6
3,4,5
GND
C6
22 µF
VOUT= 3.3 V
VOUT
C7 R4
22 µF
51.1 Ω
C8
200 pF
R5
31.6 kΩ
R6
10 kΩ
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS54334
TPS54334
SLUSC26A – MAY 2015 – REVISED FEBRUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information ................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Applications ................................................ 16
9 Power Supply Recommendations...................... 24
10 Layout................................................................... 24
10.1 Layout Guidelines ................................................. 24
10.2 Layout Example .................................................... 25
11 Device and Documentation Support ................. 26
11.1 Device Support...................................................... 26
11.2 Documentation Support ........................................ 26
11.3 Community Resources.......................................... 26
11.4 Trademarks ........................................................... 26
11.5 Electrostatic Discharge Caution ............................ 26
11.6 Glossary ................................................................ 26
12 Mechanical, Packaging, and Orderable
Information ........................................................... 26
4 Revision History
DATE
May 2015
REVISION
*
NOTES
Initial release.
Changes from Original (May 2015) to Revision A
Page
• Deleted SWIFT™ from the data sheet title............................................................................................................................. 1
2 Submit Documentation Feedback
Product Folder Links: TPS54334
Copyright © 2015–2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS54334 SLUSC26A – MAY 20 15 – REVISED FEBRUARY 2016 TPS54334 4 .2-V to 28-V Input Voltage, 3-A Output Current Synchronous Step-Down Voltage C onverter 1 Features •1 Two 128mΩ/84 mΩ MOSFETs for 3A Continuous Output Cu rrent • Power Good • Low 2 µA Shut down Quiescent Current • 0.8 V Intern al Voltage Reference with ±1.5% Accura cy Over Temperature • Fixed-Frequency Current Mode Control • Pulse Skippin g Boosts Efficiency at Light Loads • Overcurrent Protection for Both MOSFETs with Hiccup Mode for Severe Fault Cond itions • Thermal and Overvoltage Tran sient Protection • Available in Easy- to-Use 8-Pin SOIC PowerPAD™ and 10-Pi n SON • Monotonic Start-Up into Pre-b iased Outputs 2 Applications • Consum er Applications such as a Digital TV (D TV), Set Top Box (STB, DVD/Blu-ray Play er), LCD Display, CPE (Cable Modem, WiF i Router), DLP Projectors, Smart Meters • Battery Chargers • Industrial and Car Audio Power Sup.
Keywords TPS54334, datasheet, pdf, etcTI, 3-A, Output, Current, Synchronous, Step-Down, Voltage, Converter, PS54334, S54334, 54334, TPS5433, TPS543, TPS54, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)