Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- DEVICE INFORMATION
- OVERVIEW
- DETAILED DESCRIPTION
- PWM Operation
- PWM Frequency and Adaptive On-Time Control
- Auto-Skip Eco-Mode Controlsection title From: Light Load Eco-Mode Control To: Auto-Skip Eco-Mode ControlChanged section title From: Light Load Mode Control To: Light Load Eco-Mode Control
- Soft Start and Pre-Biased Soft Start
- Power Good
- Output Discharge Control
- Current Protection
- Over/Under Voltage Protection
- UVLO Protection
- Thermal Shutdown
- TYPICAL CHARACTERISTICS
- Revision History

TPS54226
www.ti.com
SLVSA14E –OCTOBER 2009–REVISED 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 © 2009–2011, Texas Instruments Incorporated 17
Product Folder Link(s): TPS54226