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16-Pin WQFN Pin Out
4
16-Pin WQFN Pin Out
Figure 2. 16-Pin WQFN (top view)
Table 1. Pin Descriptions 16-Pin WQFN
Pin
Name
Function
1,2
VIND
1
Power Input supply for Buck1.
11, 12
VIND
2
Power Input supply for Buck2.
15
VINC
Power Input supply for control circuitry.
4
PGND
1
Power ground pin for Buck 1.
9
PGND
2
Power ground pin for Buck 2.
14
AGND
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to pin.
6
PG
1
Power Good Indicator for Buck 1. Pin is connected through a resistor to an external supply (open
collector output).
7
PG
2
Power Good Indicator for Buck 2. Pin is connected through a resistor to an external supply (open
collector output).
5
FB
1
Feedback pin for Buck 1. Connect to external resistor divider to set output voltage.
8
FB
2
Feedback pin for Buck 2. Connect to external resistor divider to set output voltage.
3
SW
1
Output switch for Buck 1. Connect to the inductor.
10
SW
2
Output switch for Buck 2. Connect to the inductor.
16
EN
1
Enable control input. Logic high enable operation for Buck 1. Do not allow this pin to float or be
greater than VIN + 0.3V.
13
EN
2
Enable control input. Logic high enable operation for Buck 2. Do not allow this pin to float or be
greater than VIN + 0.3V.
DAP
Die Attach Pad Connect to system ground for low thermal impedance and as a primary electrical GND
connection.
3
SNVA353B – February 2009 – Revised April 2013
AN-1870 LM26420 Evaluation Board
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