Datasheet

TPS51220A
SLUS897E –DECEMBER 2008–REVISED JANUARY 2013 www.ti.com
Table 9. Current Mode, DCR Sensing, 5-V/5-A, 3.3-V/5-A, 300-kHz
SYMBOL SPECIFICATION MANUFACTURER PART NUMBER
C11 2 × 120 μF, 6.3V, 15 mΩ Panasonic EEFCX0J121R
C12 2 × 10 μF, 25 V Murata GRM32DR71E106K
C21 2 × 220 μF, 4.0 V, 15 mΩ Panasonic EEFCX0G221R
C22 2 × 10 μF, 25 V Murata GRM32DR71E106K
L1 4.0 μH, 10.3 A, 6.6 mΩ Sumida CEP125-4R0MC-H
L2 4.0 μH, 10.3 A, 6.6 mΩ Sumida CEP125-4R0MC-H
Q11, Q21 30 V, 13.6 A, 9.5 mΩ IR IRF7821
Q12, Q22 30 V, 13.8 A, 5.8 mΩ IR IRF8113
REVISION HISTORY
Changes from Original (December 2008) to Revision A Page
• Changed t
(SSDYL)
- SoftStart Delay Typical value From: 140 To: 200 ................................................................................... 5
• Changed t
(SS)
- SoftStart Delay Typical value From: 800 To 960 ......................................................................................... 5
Changes from Revision A (March 2009) to Revision B Page
• Changed SW1 and SW2 Abs Max range From: –5 to 34 To: –7 to 34 ................................................................................ 3
• Changed DRVH1, DRVH2 Abs Max range From: –5 to 39 To: –7 to 39 ............................................................................. 3
• Added a row to the Recommended Operating Conditions table - DRVH1, DRVH2 (negative overshoot -6 V for t <
20% duration of the switching period) .................................................................................................................................. 3
• Added a row to the Recommended Operating Conditions table - SW1, SW2 (negative overshoot -6 V for t < 20%
duration of the switching period ............................................................................................................................................ 3
• Changed the legend of Figure 22 From: V
I
= 12 V To: Auto-Skip ...................................................................................... 14
• Changed the legend of Figure 27 From R
GV
= 1 kΩ To: R
GV
= 10 k .................................................................................. 16
• Changed the time scale of Figure 36 From: 1 mec/div To: 10msec/div ............................................................................. 19
• Changed the time scale of Figure 37 From: 1 mec/div To: 10msec/div ............................................................................. 19
• Added subsection: 180 Degrees Phase Shift and Blanking Time ...................................................................................... 23
Changes from Revision B (October 2009) to Revision C Page
• Added RSN dissipation rating information ............................................................................................................................ 3
• Added RSN package ordering information ........................................................................................................................... 4
• Added RSN package electrical specifications ...................................................................................................................... 6
• Added the RSN package pinout ........................................................................................................................................... 8
Changes from Revision C (November 2009) to Revision D Page
• Changed the device number in the pin package drawings From: TPS51120A To: TPS51220A ......................................... 8
Changes from Revision D (FEBRUARY 2010) to Revision E Page
• Added DRVH1 and DRVH2 parameters to ABSOLUTE MAXIMUM RATINGS table. ......................................................... 3
• Added DRVL1 and DRVL2 parameters to ABSOLUTE MAXIMUM RATINGS table. .......................................................... 3
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