MAX16922 Datasheet, PDF (15/16 Pages) Maxim Integrated Products – 2.2MHz, Dual, Step-Down DC-DC Converters, Dual LDOs, and RESET

2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and RESET
PCB Layout
High-switching frequencies and relatively large peak
currents make PCB layout a very important aspect of
design. Good design minimizes excessive EMI on the
feedback paths and voltage gradients in the ground
plane, both of which can result in instability or regula-
tion errors. Connect the input capacitors as close as
possible to the PV_ and ground. Connect the inductor
and output capacitors as close as possible to the
device and keep the traces short, direct, and wide to
minimize the current loop area.
The OUTS_ feedback connections are sensitive to
inductor magnetic field interference so route these
traces away from the inductors and noisy traces such
as LX_.
Connect GND_ and PGND2 to the ground plane.
Connect the exposed paddle to the ground plane
with multiple vias to help conduct heat away from
the device.
Refer to the MAX16922 evaluation kit for a PCB layout
example.
Selector Guide
MAX16922 ATP x /V +
MAX16922 AUP x /V +
LEAD FREE
AEC Q100 QUALIFIED
OUTPUT VOLTAGES RESET THRESHOLD, RESET TIMEOUT
-40°C TO +125°C OPERATION, TQFN, 20 PINS
LEAD FREE
AEC Q100 QUALIFIED
OUTPUT VOLTAGES RESET THRESHOLD, RESET TIMEOUT
-40°C TO +125°C OPERATION, TSSOP, 20 PINS
PART
NUMBER
SUFFIX*
OUT1
VOLTAGE
(V)
OUT2
VOLTAGE
(V)
OUT3
VOLTAGE
(V)
OUT4
VOLTAGE
(V)
A
5.00
2.70
3.30
1.0
B
5.00
1.20
1.80
3.3
C
5.00
3.30
1.20
3.0
D
3.6
1.2
3.3
3.3
E
5.00
3.30
2.50
1.80
F
5.00
1.20
3.15
3.00
G
3.30
Off
2.80
1.80
H
3.30
1.20
2.50
1.80
*Other standard versions may be available. Contact factory for availability.
OUT1 RESET
THRESHOLD
(%)
90
90
90
90
90
90
90
90
RESET
TIMEOUT
(ms)
14.9
14.9
14.9
14.9
14.9
14.9
14.9
14.9
BST
REFRESH
LOAD
ENABLE
On
On
On
Off
On
On
On
Off
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