Datasheet
TPS54340
SLVSBK0B –OCTOBER 2012–REVISED MARCH 2014
www.ti.com
Table of Contents
8.2 Functional Block Diagram ....................................... 11
1 Features.................................................................. 1
8.3 Feature Description................................................. 11
2 Applications ........................................................... 1
8.4 Device Functional Modes........................................ 22
3 Description ............................................................. 1
9 Application and Implementation ........................ 24
4 Simplified Schematic............................................. 1
9.1 Application Information............................................ 24
5 Revision History..................................................... 2
9.2 Typical Application .................................................. 24
6 Terminal Configuration and Functions................ 3
10 Power Supply Recommendations ..................... 34
7 Specifications......................................................... 4
11 Layout................................................................... 35
7.1 Absolute Maximum Ratings ..................................... 4
11.1 Layout Guidelines ................................................. 35
7.2 Handling Ratings....................................................... 4
11.2 Layout Example .................................................... 35
7.3 Recommended Operating Conditions....................... 4
12 Device and Documentation Support ................. 36
7.4 Thermal Information.................................................. 4
12.1 Trademarks........................................................... 36
7.5 Electrical Characteristics........................................... 5
12.2 Electrostatic Discharge Caution............................ 36
7.6 Timing Requirements................................................ 6
12.3 Glossary................................................................ 36
7.7 Typical Characteristics.............................................. 6
13 Mechanical, Packaging, and Orderable
8 Detailed Description ............................................ 10
Information ........................................................... 36
8.1 Overview ................................................................. 10
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (February 2013) to Revision B Page
• Changed the data sheet to the new TI layout ........................................................................................................................ 1
• Changed the Application List From: 12 V, 24 V and 48 V Industrial To: 12 V, 24 V Industrial.............................................. 1
• Added the Device Information table ....................................................................................................................................... 1
• Added the Handling Ratings table.......................................................................................................................................... 4
• Added the Recommended Operating Conditions table.......................................................................................................... 4
• Added the Thermal Information table inside the document ................................................................................................... 4
• Changed the Operating: nonswitching supply current TEST CONDITIONS From: FB = 0.83 V To: FB = 0.9 V ................. 5
• Changed RT/CLK high threshold MAX value From: 1.7 V To: 2 V ....................................................................................... 5
• Changed Figure 7 title From: HIGH FREQUENCY RANGE To: LOW FREQUENCY RANGE............................................. 6
• Changed Figure 8 title From: LOW FREQUENCY RANGE To: HIGH FREQUENCY RANGE............................................. 7
• Added the Power Supply Recommendations section .......................................................................................................... 34
Changes from Original (October 2012) to Revision A Page
• Changed Figure 12 From: I
EN
(µV) To: I
EN
(µA) ..................................................................................................................... 7
• Changed Figure 13 From: I
EN
(µV) To: I
EN
(µA) ..................................................................................................................... 7
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