Datasheet

TPS54226
www.ti.com
SLVSA14E OCTOBER 2009REVISED JULY 2011
REVISION HISTORY
Changes from Original (October 2009) to Revision A Page
Changed the device from Product Preview to Production .................................................................................................... 1
Changes from Revision A (October 2009) to Revision B Page
Changed the title to include Eco-Mode ................................................................................................................................. 1
Changed features bullet to reference Eco-Mode .................................................................................................................. 1
Added Eco-Mode text to the DESCRIPTION ....................................................................................................................... 1
Added the QFN package to the DESCRIPTION .................................................................................................................. 1
Added the QFN package to the ORDERING INFORMATION table .................................................................................... 2
Added the RGT PACKAGE drawing ..................................................................................................................................... 5
Added the RGT 16 pin column to the PIN FUNCTIONS table ............................................................................................. 5
Updated the FUNCTIONAL BLOCK DIAGRAM ................................................................................................................... 6
Added text Note to the FUNCTIONAL BLOCK DIAGRAM ................................................................................................... 6
Added Eco-Mode text to the OVERVIEW section ................................................................................................................ 6
Changed section title From: Light Load Mode Control To: Light Load Eco-Mode Control ................................................... 7
Added Eco-Mode to text in the Light Load Eco-Mode Control section ................................................................................. 7
Added Note 1 to Table 1 ..................................................................................................................................................... 14
Added text to the THERMAL INFORMATION section for the QFN package ..................................................................... 15
Deleted figure "Thermal Pad Dimensions" ......................................................................................................................... 15
Changes from Revision B (June 2010) to Revision C Page
Changed TPS54226PWPR tape and reel quantity From: 3000 To: 2000 ............................................................................ 2
Added V
CC
,V
IN
= 12V to the conditions statement in the Electrical Characteristics table ..................................................... 3
Changes from Revision C (October 2010) to Revision D Page
Changed 45°C to 85°C to 40°C to 85°C in Ordering Information ..................................................................................... 2
Deleted quantities from Transport Media column ................................................................................................................. 2
Added Thermal Information table ......................................................................................................................................... 2
Changed EN low-level input voltage max from 0.4 V to 0.48 V ........................................................................................... 3
Changed Functional Block Diagram ..................................................................................................................................... 6
Changed section title From: Light Load Eco-Mode Control To: Auto-Skip Eco-Mode Control ............................................. 7
Added Auto-Skip to text in Auto-Skip Eco-Mode Control section ......................................................................................... 7
Changed Equation 1 ............................................................................................................................................................. 7
Changed Power Good section text ....................................................................................................................................... 7
Changed Current Protection section text .............................................................................................................................. 8
Changed Design Guide information .................................................................................................................................... 13
Changed C4 values in Table 1 ........................................................................................................................................... 14
Changes from Revision D (February 2011) to Revision E Page
Changed EN high-level input voltage min from 2 V to 1.5 V ................................................................................................ 3
Changed EN low-level input voltage max from 0.48 V to 0.4 V ........................................................................................... 3
Copyright © 20092011, Texas Instruments Incorporated 17
Product Folder Link(s): TPS54226