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TPS54310 Datasheet

3-A Output Synchronous-Buck PWM Switcher

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TPS54310
SLVS412F – DECEMBER 2001 – REVISED APRIL 2019
TPS54310 3-V to 6-V Input, 3-A Output Synchronous-Buck PWM Switcher
With Integrated FETs
1 Features
1 60-mMOSFET switches for high efficiency at 3-
A continuous output source or sink current
• Adjustable output voltage down to 0.9 V With 1%
accuracy
• Externally compensated for design flexibility
• Fast transient response
• Wide PWM frequency: fixed 350 kHz, 550 kHz, or
adjustable 280 kHz to 700 kHz
• Load protected by peak current limit and thermal
shutdown
• Integrated solution reduces board area and total
cost
2 Applications
• Low-voltage, high-density systems with power
distributed at 5 V or 3.3 V
• Point-of-load regulation for high
performance DSPs, FPGAs, ASICs, and
microprocessors
• Broadband, networking and optical
communications infrastructure
• Portable computing/notebook PCs
3 Description
As a member of one of TI's families of dc/dc
regulators, the TPS54310 low-input-voltage high-
output-current synchronous-buck PWM converter
integrates all required active components. Included
on the substrate with the listed features are a true,
high performance, voltage error amplifier that
provides high performance under transient conditions;
an undervoltage-lockout circuit to prevent start-up
until the input voltage reaches 3 V; an internally and
externally set slow-start circuit to limit in-rush
currents; and a power good output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54310 device is available in a thermally
enhanced 20-pin HTSSOP (PWP) PowerPAD™
package, which eliminates bulky heatsinks. TI
provides evaluation modules to aid in quickly
achieving high- performance power supply designs to
meet aggressive equipment development cycles.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS54310
HTSSOP
PowerPAD (20)
6.40 mm × 6.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Input
Simplified Schematic
VIN
PH
TPS54310
BOOT
PGND
VBIAS VSENSE
AGND COMP
Output
Efficiency vs Load Current
96
94
92
90
88
86
84
TA = 25°C
82 VI = 5 V
VO = 3.3 V
80
0 0.5 1 1.5 2 2.5 3
Load 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.




etcTI

TPS54310 Datasheet Preview

TPS54310 Datasheet

3-A Output Synchronous-Buck PWM Switcher

No Preview Available !

TPS54310
SLVS412F – DECEMBER 2001 – REVISED APRIL 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Dissipation Ratings .................................................. 5
7.6 Electrical Characteristics........................................... 5
7.7 Typical Characteristics .............................................. 7
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9
8.4 Device Functional Modes........................................ 12
9 Application and Implementation ........................ 13
9.1 Application Information............................................ 13
9.2 Typical Application ................................................. 13
10 Power Supply Recommendations ..................... 18
11 Layout................................................................... 18
11.1 Layout Guidelines ................................................. 18
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1 Related DC/DC Products ...................................... 20
12.2 Receiving Notification of Documentation Updates 20
12.3 Community Resources.......................................... 20
12.4 Trademarks ........................................................... 20
12.5 Electrostatic Discharge Caution ............................ 20
12.6 Glossary ................................................................ 20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
Changes from Revision E (November 2014) to Revision F
Page
• Editorial updates only; no technical changes ........................................................................................................................ 1
Changes from Revision D (February 2007) to Revision E
Page
• Added Pin Configuration and Functions section, ESD Ratings 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 .............................. 1
2
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Product Folder Links: TPS54310
Copyright © 2001–2019, Texas Instruments Incorporated


Part Number TPS54310
Description 3-A Output Synchronous-Buck PWM Switcher
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