TERMINAL FUNCTIONS (DCA) (continued)
NAME NO. I/O DESCRIPTION
VIN 32 I Input supply
VIN 33 I Input supply
VIN 34 I Input supply
GND 35 Ground pin
LX3 36, 37 O Switching node for Buck 3
VIN3 38 Input supply for Buck 3. Fit a 10-μF ceramic capacitor close to this pin.
BST3 39 I Bootstrap capacitor for Buck 3. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
EN3 40 I Enable pin for Buck 3. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
PAD Power pad. Connect to ground.
2-26
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