Datasheet

LO1
PGND
LM5112
LM5112
VCC
BST1
HO1
HS1
VIN
LM5046
LO1
PGND
VCC
BST1
HO1
HS1
VIN
LM5046
Q1
Q2
LM5046
www.ti.com SNVS703G –FEBRUARY 2011–REVISED MARCH 2013
Figure 35. Bipolar Totem Pole Arrangement
Alternatively, a low side gate driver such as LM5112 can be utilized instead of the discrete totem pole. The
LM5112 comes in a small package with a 3A source and a 7A sink capability. While driving the high-side FET,
the HS1 acts as a local ground and the boot capacitor between the BST and HS pins acts as VCC.
Figure 36. Using a Low Side Gate Driver to Augment Gate Drive Strength
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