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TPS40055 Datasheet Preview

TPS40055 Datasheet

Wide-Input Synchronous Buck Controller

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TPS40054: Not Recommended For New Designs
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TPS40054, TPS40055, TPS40057
SLUS593I – DECEMBER 2003 – REVISED DECEMBER 2014
TPS4005x Wide-Input Synchronous Buck Controller
1 Features
1 Operating Input Voltage 8 V to 40 V
• Input Voltage Feed-Forward Compensation
• < 1% Internal 0.7-V Reference
• Programmable Fixed-Frequency up to 1-MHz
Voltage Mode Controller
• Internal Gate-Drive Outputs for High-Side and
Synchronous N-Channel MOSFETs
• 16-Pin PowerPAD™ Package (θJC = 2°C/W)
• Thermal Shutdown
• Externally Synchronizable
• Programmable High-Side Sense Short-Circuit
Protection
• Programmable Closed-Loop Soft-Start
• TPS40054 Source Only
• TPS40055 Source and Sink
• TPS40057 Source and Sink With VO Prebias
2 Applications
• Power Modules
• Networking and Telecom
• Industrial and Servers
3 Description
The TPS4005x is a family of high-voltage, wide-input
(8 V to 40 V), synchronous, step-down controllers.
The TPS4005x family offers design flexibility with a
variety of user-programmable functions, including
soft-start, UVLO, operating frequency, voltage
feed-forward, high-side current limit, and loop
compensation.
The TPS4005x uses voltage feed-forward control
techniques to provide good line regulation over the
wide (4:1) input voltage range, and fast response to
input line transients. Near-constant modulator gain
with input variation eases loop compensation. The
externally programmable current limit provides pulse-
by-pulse current limit, as well as hiccup mode
operation using an internal fault counter for longer
duration overloads.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS4005x
HTSSOP (16)
5.00 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
+
VIN
TPS4005xPWP
1 KFF
ILIM 16
2 RT
VIN 15
3 BP5
BOOST 14
4 SYNC
HDRV 13
5 SGND
SW 12
6 SS/SD
BP10 11
7 VFB
LDRV 10
8 COMP PGND 9
+
VO
UDG-03179
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.




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TPS40055 Datasheet Preview

TPS40055 Datasheet

Wide-Input Synchronous Buck Controller

No Preview Available !

TPS40054: Not Recommended For New Designs
TPS40054, TPS40055, TPS40057
SLUS593I – DECEMBER 2003 – REVISED DECEMBER 2014
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 Recommended Operating Conditions....................... 4
6.3 Thermal Information .................................................. 4
6.4 Electrical Characteristics........................................... 5
6.5 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 8
7.4 Device Functional Modes........................................ 15
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application .................................................. 20
9 Power Supply Recommendations...................... 26
10 Layout................................................................... 26
10.1 Layout Guidelines ................................................. 26
10.2 Layout Example .................................................... 26
10.3 MOSFET Packaging ............................................. 29
11 Device and Documentation Support ................. 29
11.1 Device Support .................................................... 29
11.2 Documentation Support ....................................... 29
11.3 Related Links ........................................................ 29
11.4 Trademarks ........................................................... 30
11.5 Electrostatic Discharge Caution ............................ 30
11.6 Glossary ................................................................ 30
12 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision H (July 2012) to Revision I
Page
• Added Handling 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. .............................................................. 3
Changes from Revision G (September 2011) to Revision H
Page
• Added the Thermal Information table ..................................................................................................................................... 4
Changes from Revision F (September 2008) to Revision G
Page
• Deleted errors in schematic.................................................................................................................................................... 1
• Changed ILIM to IILIM (corrected typographical error)............................................................................................................. 12
• Added clarity to Loop Compensation section ....................................................................................................................... 13
• Changed VIN(UVLO) to VIN(min) in two places (corrected typographic errors) ........................................................................... 13
• Changed corrected Equation 46........................................................................................................................................... 20
• Changed corrected reference designator values in Figure 15 ............................................................................................. 20
• Changed corrected Equation 56........................................................................................................................................... 22
• Changed corrected Equation 67........................................................................................................................................... 23
• Changed corrected Equation 69........................................................................................................................................... 23
2 Submit Documentation Feedback
Copyright © 2003–2014, Texas Instruments Incorporated
Product Folder Links: TPS40054 TPS40055 TPS40057


Part Number TPS40055
Description Wide-Input Synchronous Buck Controller
Maker etcTI
Total Page 30 Pages
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