Datasheet

VIAS to
GND PLANE
VIN
VOUT
C
IN1
C
IN2
C
OUT
L1
R1
R2
R3
1
VIA to
GND PLANE
VIAS to
GND PLANE
VIN
VOUT
C
IN1
C
IN2
C
OUT
L1
R1
R2
R3
1
VIA to
GND PLANE
VIAS to
GND PLANE
TPS62736
TPS62737
www.ti.com SLVSBO4B –OCTOBER 2012–REVISED JULY 2013
In order to maximize efficiency at light load, the use of voltage level setting resistors > 1MΩ is recommended.
However, during board assembly, contaminants such as solder flux and even some board cleaning agents can
leave residue that may form parasitic resistors across the physical resistors and/or from one end of a resistor to
ground, especially in humid, fast airflow environments. This can result in the voltage regulation and threshold
levels changing significantly from those expected per the installed resistor values. Therefore, it is highly
recommended that no ground planes be poured near the voltage setting resistors. In addition, the boards must
be carefully cleaned, possibly rotated at least once during cleaning, and then rinsed with de-ionized water until
the ionic contamination of that water is well above 50 MOhm. If this is not feasible, then it is recommended that
the sum of the voltage setting resistors be reduced to at least 5X below the measured ionic contamination.
Figure 74. Recommended Layout, TPS62736 Figure 75. Recommended Layout, TPS62737
REVISION HISTORY
Changes from Original (October 2012) to Revision A Page
• Changed the device From: Preview To: Active .................................................................................................................... 1
Changes from Revision A (March 2013) to Revision B Page
• Added the TPS62737 Pinout information ............................................................................................................................. 6
• Added the TPS62737 Application Circuit, Figure 2 .............................................................................................................. 9
• Added graphs for TPS62737 to the Typical Characteristics ............................................................................................... 17
• Changed Figure 74 ............................................................................................................................................................. 27
• Added Figure 75 ................................................................................................................................................................. 27
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Product Folder Links: TPS62736 TPS62737