4 Revision History

Changes from J Revision (October 2016) to K Revision

• Updated the VIN, VOUT Unit in the Electrical Characteristics tableGo

Changes from I Revision (January 2015) to J Revision

• Updated Maximum Allowable Load to Ensure Successful Startup sectionGo
• Updated Equation 6Go

Changes from H Revision (January 2014) to I Revision

• Changed the package and ordering information to the Device Comparison TableGo
• Added the I/O column to the Pin Functions table Go
• Added the ESD Ratings table and changed the CDM value From: 400V To: ±500V Go
• Replaced the Dissipation Ratings table with the Thermal Information tableGo
• Added the Detailed Description sectionGo
• Changed the PIN DESCRIPTION section to the Feature Description sectionGo
• Added the Application and Implementation section Go
• Added the Power Supply Recommendations sectionGo
• Added Figure 23Go

Changes from G Revision (May 2013) to H Revision

• Deleted minimum voltage from voltage range in the document title, features list and descriptionGo
• Added 5-A to document titleGo
• Changed listed to recognized in UL FEATURES bullet, also added specific UL numberGo
• Added SSDs, PCIE, and Fan Control to the APPLICATIONS listGo
• Added maximum-UV turn-on threshold of 2.9 V sentence to the first paragraph of the DESCRIPTIONGo
• Deleted capacitor, C_VIN, and diode from the Typical Application image. Also changed R_SET to R_RSET and C_OUT to C_LOAD. Removed voltage range and changed OUT to VOUT. Also removed note on the former C_OUT stating that this is only required in systems with lead and/or load inductanceGo
• Changed C_OUT to C_LOAD and R_SET to R_RSET throughout documentGo
• Changed current limit value of the ISET description from 125% to 150% in thePin Functions table. Also removed TPS2421 only text form this descriptionGo
• Changed C_OUT to C_VOUT for the power limit parameter in the Electrical Characteristics tableGo
• Changed R_SET = 100 kW to R_RSET = 100 kΩ in the FAULT CURRENT vs JUNCTION TEMPERATURE graphGo
• Added note for TPS2421-1 to the VIN description in the PIN DESCRIPTION sectionGo
• Changed V_IN to V_VIN in the functional block diagram, Equation 6Go
• Changed In to V_VIN in Equation 17Go

Changes from G Revision (May 2013) to H Revision

• Deleted minimum voltage from voltage range in the document title, features list and descriptionGo
• Added 5-A to document titleGo
• Changed listed to recognized in UL FEATURES bullet, also added specific UL numberGo
• Added SSDs, PCIE, and Fan Control to the APPLICATIONS listGo
• Added maximum-UV turn-on threshold of 2.9 V sentence to the first paragraph of the DESCRIPTIONGo
• Deleted capacitor, C_VIN, and diode from the Typical Application image. Also changed R_SET to R_RSET and C_OUT to C_LOAD. Removed voltage range and changed OUT to VOUT. Also removed note on the former C_OUT stating that this is only required in systems with lead and/or load inductanceGo
• Changed C_OUT to C_LOAD and R_SET to R_RSET throughout documentGo
• Changed current limit value of the ISET description from 125% to 150% in thePin Functions table. Also removed TPS2421 only text form this descriptionGo
• Changed C_OUT to C_VOUT for the power limit parameter in the Electrical Characteristics tableGo
• Changed R_SET = 100 kW to R_RSET = 100 kΩ in the FAULT CURRENT vs JUNCTION TEMPERATURE graphGo
• Added note for TPS2421-1 to the VIN description in the PIN DESCRIPTION sectionGo
• Changed V_IN to V_VIN in the functional block diagram, Equation 6Go
• Changed In to V_VIN in Equation 17Go

Changes from F Revision (April 2013) to G Revision

• Deleted I_SET, C_T Voltage from the Absolute Maximum Ratings tableGo

Changes from E Revision (September 2011) to F Revision

• Changed C_CT values From: MIN = 100 pF/µF To 0.1 nF and MAX From: 10 pF/µF To: -- in the Recommended Operating Conditions tableGo
• Added R_RSET to the Recommended Operating Conditions tableGo
• Changed the conditions statement of the Electrical Characteristics tableGo
• Changed the TEST CONDITIONS for R_ONGo
• Changed I_LIM / I_FLT To: I_LIM / I_SETGo
• Changed the PIN DESCRIPTION sectionGo
• Changed the Application Information section.Go

Changes from D Revision (August 2010) to E Revision

• Changed RFLT to RSETGo
• Changed equation 3 from RIFLT to RISET and IFAULT to ISETGo

Changes from C Revision (July 2010) to D Revision

• Added Feature: UL Listed - File Number E169910Go

Changes from B Revision (June 2010) to C Revision

• Changed T_SD (ms) column in Table 3. (the table was deleted in revision F)Go

Changes from A Revision (March 2009) to B Revision

• Added For the most current package and ordering information, see the Package Option Addendum at the end of this document, or visit the device product folder on www.ti.com.Go