TPS5431 Converter Datasheet

TPS5431 Datasheet PDF, Equivalent


Part Number

TPS5431

Description

3-A Wide Input Range Step-Down Converter

Manufacture

etcTI

Total Page 30 Pages
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TPS5431
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TPS5430, TPS5431
SLVS632I – JANUARY 2006 – REVISED APRIL 2017
TPS543x 3-A, Wide Input Range, Step-Down Converter
1 Features
1 Wide Input Voltage Range:
– TPS5430: 5.5 V to 36 V
– TPS5431: 5.5 V to 23 V
• Up to 3-A Continuous (4-A Peak) Output Current
• High Efficiency up to 95% Enabled by 110-m
Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down to
1.22 V with 1.5% Initial Accuracy
• Internal Compensation Minimizes External Parts
Count
• Fixed 500 kHz Switching Frequency for Small
Filter Size
• Improved Line Regulation and Transient
Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting,
Overvoltage Protection and Thermal Shutdown
• –40°C to 125°C Operating Junction Temperature
Range
• Available in Small Thermally Enhanced 8-Pin SO
PowerPAD™ Package
• Create a Custom Design Using the TPS5430 With
the WEBENCH® Power Designer
2 Applications
• Consumer: Set-top Box, DVD, LCD Displays
• Industrial and Car Audio Power Supplies
• Battery Chargers, High Power LED Supply
• 12-V/24-V Distributed Power Systems
3 Description
The TPS543x is a high-output-current PWM converter
that integrates a low-resistance, high-side N-channel
MOSFET. Included on the substrate with the listed
features are a high-performance voltage error
amplifier that provides tight voltage regulation
accuracy under transient conditions; an undervoltage-
lockout circuit to prevent start-up until the input
voltage reaches 5.5 V; an internally set slow-start
circuit to limit inrush currents; and a voltage feed-
forward circuit to improve the transient response.
Using the ENA pin, shutdown supply current is
reduced to 18 μA typically. Other features include an
active-high enable, overcurrent limiting, over-voltage
protection and thermal shutdown. To reduce design
complexity and external component count, the
TPS543x feedback loop is internally compensated.
The TPS5431 is intended to operate from power rails
up to 23 V. The TPS5430 regulates a wide variety of
power sources including 24 V bus.
The TPS543x device is available in a thermally
enhanced, easy to use 8-pin SOIC PowerPAD™
package. TI provides evaluation modules and the
Designer software tool to aid in quickly achieving
high-performance power supply designs to meet
aggressive equipment development cycles.
Device Information(1)
PART NUMBER
PACKAGE
INPUT VOLTAGE
TPS5430
TPS5431
HSOP (8)
5.5 V to 36 V
5.5 V to 23 V
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Efficiency vs Output Current
VIN
VIN PH
TPS5430/31
NC BOOT
NC
ENA VSENSE
GND
VOUT
100
95
90
85
80
75
70
65 VI = 12 V
VO = 5 V
60 fs = 500 kHz
55 TA = 25oC
50
0 0.5 1 1.5 2 2.5 3 3.5
IO - Output Current - A
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.

TPS5431
TPS5430, TPS5431
SLVS632I – JANUARY 2006 – REVISED APRIL 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 7
6.6 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 12
8 Application and Implementation ........................ 13
8.1 Application Information............................................ 13
8.2 Typical Applications ................................................ 14
9 Power Supply Recommendations...................... 26
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................. 26
10.2 Layout Example .................................................... 27
11 Device and Documentation Support ................. 28
11.1 Device Support...................................................... 28
11.2 Related Links ........................................................ 28
11.3 Trademarks ........................................................... 28
11.4 Electrostatic Discharge Caution ............................ 28
11.5 Glossary ................................................................ 28
12 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
Changes from Revision H (April 2016) to Revision I
Page
• Added WEBENCH® Model ................................................................................................................................................... 1
• Changed Absolute Maximum Ratings PH (transient < 10 ns) spec MIN voltage from "–1.2" to "–4" .................................... 5
Changes from Revision G (February 2015) to Revision H
Page
• Deleted "Recommended Land Pattern" figure from core data sheet. New drawings are furnished in the Mechanical,
Packaging, and Orderable Information section. ................................................................................................................... 27
Changes from Revision F (December 2014) to Revision G
Page
• Fixed typo error TPS5430x to TPS513x ................................................................................................................................ 1
Changes from Revision E (September 2013) to Revision F
Page
• Added ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 4
Changes from Revision D (January 2013) to Revision E
Page
• Deleted SWIFT from the data sheet Title, Features, and Description.................................................................................... 1
Changes from Revision C (November 2006) to Revision D
Page
• Replaced the DISSIPATION RATINGS with the THERMAL INFORMATION table............................................................... 5
2 Submit Documentation Feedback
Copyright © 2006–2017, Texas Instruments Incorporated
Product Folder Links: TPS5430 TPS5431


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity Reference Design TPS5430, TPS5 431 SLVS632I – JANUARY 2006 – REVIS ED APRIL 2017 TPS543x 3-A, Wide Input R ange, Step-Down Converter 1 Features 1 Wide Input Voltage Range: – TPS54 30: 5.5 V to 36 V – TPS5431: 5.5 V to 23 V • Up to 3-A Continuous (4-A Pea k) Output Current • High Efficiency u p to 95% Enabled by 110-mΩ Integrated MOSFET Switch • Wide Output Voltage Range: Adjustable Down to 1.22 V with 1 .5% Initial Accuracy • Internal Compe nsation Minimizes External Parts Count • Fixed 500 kHz Switching Frequency f or Small Filter Size • Improved Line Regulation and Transient Response by In put Voltage Feed Forward • System Pro tected by Overcurrent Limiting, Overvol tage Protection and Thermal Shutdown –40°C to 125°C Operating Junction Temperature Range • Available in Sma ll Thermally Enhanced 8-Pin SO PowerPAD ™ Package • Create a Custom Design Using the TPS5430 With the WEBENCH® Power Designer 2 Applicati.
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