ADP2107-1.8-EVALZ Analog Devices Inc, ADP2107-1.8-EVALZ Datasheet - Page 27

• Manufacturer Part Number: ADP2107-1.8-EVALZ
• Description: BOARD EVAL FOR ADP2107-1.8
• Manufacturer: Analog Devices Inc

Specifications of ADP2107-1.8-EVALZ

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.8V
• Current - Output: 2A
• Voltage - Input: 2.7 ~ 5.5V
• Regulator Topology: Buck
• Frequency - Switching: 1.2MHz
• Board Type: Fully Populated
• Utilized Ic / Part: ADP2107
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

CIRCUIT BOARD LAYOUT RECOMMENDATIONS
Good circui
performance from the ADP2105/ADP2106/ADP21
circui
electromagnetic i terfer
compatibility (E
Figure 54 and F
the ADP2105/A
performance. R
the suggested la
•
•
•
•
Use separa
the ground feren
compensat
analog gro
components (such a
ground. In a ition
exposed pa
For each P
PWIN pin
power grou
Place the 0
pin and t
Ensure t
as possib
L, C
To accom
capacitors s re a c
t layout degrades t
OUT
, a
t board layout is essential to obtaining the best
hat th
he PW
le. Ma
nd th
plish
igu
efer
und
WI
as p
you
te a
d o
ion and output
.1 μ
DP2106/ADP2
MC
nd
re
dd
ha
n
re 55
f the
N pi
e PG
nalo
e hig
ossib
t are n
F, 10
; con
plan
) pe
to t
ke th
this
IN
n, place
he follo
ADP210
g and p
1 pin, as close to the IN pin as po
, connec
ND pla
rforma
ce of se
, ensure
he o
ence (E
le and c
h curre
s input
e.
show t
ommo
nect th
Ω low
e high
eeded
utp
-pas
ne ba
wing
nce.
he id
ower
n PG
nsitiv
107 t
and o
nt lo
voltage divider co
e gro
onn
ut ripple, a
MI)
an i
:
t both
5/A
curr
that
s input fil
ect the ot
DP2106/A
nput capa
eal circui
ck to C
ops are as short and as
and elec
o achiev
ent path f
ND plan
guidelin
und refe
ground
e analog
utput ca
the inpu
the gro
s w
IN
her e
trom
pacit
e the hig
plan
ter b
es if adj
und
as sh
renc
e.
t bo
cito
t an
circ
ell as the
DP
rom
2107.
nd to th
ard layo
es. Con
ors) to p
r as clos
d outpu
planes t
etween
agnetic
uitry (s
mpone
e of pow
ort as p
C
07. Poor
ustm
IN
hes
thr
t
nts) to
o the
e closest
ossible.
nect
uch as
the IN
t
ut for
ower
e to the
ssible.
ents to
ough
er
wide
Rev. C | Page 27 of 36
•
•
•
Make the high current path from the PGND pin through L
and C
acc
PGND plane as clo
capac
The f
close
lengt
divid
keepi
(swit
groun
to red
(1.2 V
can le
This
the F
The placement and r ting of the co pensation co ponents
are cr
ADP210
as clos
0402-
leadi
comp
picku
is to b
om
can be
ng to sm
h of tr
ch) no
er to the o
B pin
eedba
ng aw
p. The m
ad to n
itical f
itors.
as po
sized
onen
e the
uce n
OUT
d pla
e to
plish this, ensure that th
and
7. The c
back to the PGND plane as short as possible. To
.
the COMP pin as possib
ssible to
ts with a
analog g
ne is to
ck resis
1.5 V),
compen
ace con
ay from
oise pic
de that
fixed by
or prop
oise pi
ADP2105/ADP2106/ADP2107
aller
etal l
utp
om
ckup
ayer
tor d
poo
para
ut is
nect
be p
kup
roun
can
er be
sati
se a
n an
the FB pin
pen
the hi
pla
ou
r routing o
cing a 1 nF
on compon
. For the lo
s possible to the input an
, adversely
sitics. Surr
under the
ing the top
lead to noi
laced on ei
sation com
ivider net
to be as sh
alog grou
d plane.
havior of th ADP2105/A
gh curr
e P
to
compen
ent t
work is
nd pla
prev
f the
w fi
affect
by
ound
ents f
GND pin i
se p
the
ort a
ponen
le. It
of th
m
e
pass capacit
r side of th
xed voltag
races and
ent noise pickup. The
ickup. An
OUT_SEN
s possibl
ing load r
or closer
is advisab
e feedba
the com
ne to pr
ts are to
sation c
to be p
s ti
e wh
event
the L
ed to the
ck r
e op
pensa
egula
d ou
lace
e FB
or c
ompo
ana
placemen
be p
SE
le to
m
DP2
esistor
log
trace
lose to
d as
tions
ile
tput
X
laced
tion.
trace
noise
106/
use
tion
nents
t,