V

IN

V

OUT

t-Time-5ms/div

ENA

V

OUT

t-Time-5ms/div

TPS54331

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SLVS839D

– JULY 2008 – REVISED JANUARY 2012

Figure 25. TPS54331 Start Up

Figure 26. TPS54331 Start-up Relative to Enable

SPACER

REVISION HISTORY

Changes from Original (July 2008) to Revision A

Page

•

Changed the Elect Char - Shutdown supply current test condition From: -40

°C to 25°C To: From: -40°C to 85°C and

the MAX value from 10

µA to 4µA ......................................................................................................................................... 3

Changes from Revision A (August 2008) to Revision B

Page

•

Added 25

°C to the Switching frequency test condition in the Elect Char table. ................................................................... 3

•

Changed the Switching frequency Max value From: 740kHz To: 684kHz, and the Min value From: 400kHz To:

456kHz .................................................................................................................................................................................. 3

•

Added 25

°C to the Minimum controllable on time test condition in the Elec Char table. ..................................................... 3

•

Changed the Minimum controllable on time TYP value From: 110ns To: 105ns, and the Max value From: 160ns to

130ns .................................................................................................................................................................................... 3

•

Changed Rsense = 1

Ω/11 To: 1Ω/12 in Equation 18 legend ............................................................................................. 15

•

Changes from Revision B (October 2008) to Revision C

Page

•

Added a new table to the Description - For additional design needs ................................................................................... 2

•

Changed the ABSOLUTE MAXIMUM RATINGS table, Input Voltage - EN pin max value From: 5V to 6V ........................ 2

Changes from Revision C (March 2010) to Revision D

Page

•

Added TPS54331DDA option to the Ordering Information table .......................................................................................... 2

•

Added the DDA Package to the Pin Assignments ................................................................................................................ 4

•

Changed Figure 10 ............................................................................................................................................................... 7

•

Added Figure 13 ................................................................................................................................................................... 7

Copyright

© 2008–2012, Texas Instruments Incorporated

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