Application Circuits
Typical Application Circuits
Circuit1 - Fixed Output
TemplateByTechPubs
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
maxim integrated TM
maxim
integrated
TM
A Few Helpful Guidelines from Tech Pubs
A Few Helpful
Guidelines from
Tech Pubs
Rectangles in technical drawings should be made with square c...
·
Rectangles
in technical
drawings should be made
with
square
corners
,
not
rounded
Do not use the bold font except when writing a Maxim part num...
·
Do not use the bold font
except when writing a
Maxim part number or a
major component block
(
Maxim part number
should be in
ARIAL
BOLD
in
8
point
)
·
Use the
Component
Library
provided
.
Please
do not resize components
Please keep your drawing within the area shown to ensure your...
·
Please keep your drawing
within the area shown to
ensure your drawing fits
into the layout
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS All Tex...
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS
All Text
must
use the
ARIAL NARROW
font
.
The size must be
7
point
.
This is the default style
Line weights
should be
0
.
5
point
which is already set in the components
Subscripts
should be set at
9
point
in combination with the subscript position under FONT
Superscripts
should be set at
9
point
in combination with the superscript position under FONT
IMPORTANT
!
YOU
MUST
USE THE COMPONENT LIBRARY
Use the provided component library
.
Figures in the component library have already been drawn
with
0
.
5
point width
.
Use the library
,
prevent rework
!
All figures should be set to “no fill,” with no colors or sha...
·
All figures should be set
to
“
no fill
,
”
with
no
colors
or
shading
and no
logos
.
Consult Technical
Publications first if you
must use colors or
shading in a drawing
.
·
Do not use gradation on
any line
.
·
Place drawing near the
center of page
.
No need
to crop
.
Leave it on full
page
Save yourself Some time! Under HOME, set the FILL to “NO FILL...
SAVE YOURSELF
SOME TIME
!
Under
HOME
,
set the
FILL
to
“
NO FILL
”
BEFORE
you begin
working
.
This will avoid having
to drop the fill out
each time
you draw a component
Figures must be built using the components from the template ...
FIGURES
MUST
BE BUILT USING THE COMPONENTS FROM THE TEMPLATE LIBRARY
Figures created from Visio and dropped into the template
do not qualify
as using the Tech Pubs template
.
FYI
:
Use of any unofficial Visio template will not be accepted for
any
data sheet submission
Not using this template will delay the production of your data sheet
.
OfficialVisioTemplateByTechPubs (REV02A)
OfficialVisioTemplateByTechPubs (
REV
02
A
)
MAX25231ATCA MAX25231ATCB
MAX25231ATCA
MAX
25231ATCB
Bootstrap Pin for HS Driver. It is recommended to use 0.1μF from BST to LX.
BST
BST
Buck Switching Node. High impedance when part is off. Connect a 4.7μH inductor between LX and OUT.
LX
LX
Buck Regulator Output-Voltage-Sense Input. Bypass OUT to PGND with 22μF ceramic capacitor.
OUT
OUT
Feedback Pin. Connect a resistor-divider from OUT to FB to ground for external adjustment of the output voltage (MAX25231ATCD only). Connect to bias for internal fixed voltage configurations.
FB
FB
5V Internal BIAS Supply. Connect a 1μF (min) ceramic capacitor to AGND.
BIAS
BIAS
Supply Input. Connect a 4.7μF ceramic capacitor from SUP to PGND.
SUP
SUP
Sync Input. If connected to ground or open, skip-mode operation is enabled under light loads; if connected to BIAS, forced-PWM mode is enabled. This pin has a 1MΩ internal pulldown.
SYNC
SYNC
High-Voltage-Compatible Enable Input. If this pin is low, the part is off.
EN
EN
Open-Drain Reset Output. External pullup required.
PGOOD
PGOOD
Spread-Spectrum Enable. Connect logic-high to enable spread spectrum of internal oscillator or logic-low to disable spread spectrum. This pin has a 1MΩ internal pulldown.
SPS
SPS
Power Ground. Ground return path for all high-current/high-frequency noisy signals.
PGND
PGND
Analog Ground. Ground return path for all ‘quiet’ signals.
AGND
AGND
NH
NH
NL
NL
COUT 22µF
C
OUT
22
µF
CBST 0.1µF
C
BST
0
.1µF
L 4.7µH
L
4
.7µH
CBIAS 1µF
C
BIAS
1
µF
CIN 4.7µF
C
IN
4
.7µF
Circuit2 - Adjustable Output
TemplateByTechPubs
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
OFFICIAL VISIO TEMPLATE SPECIFICATIONS
maxim integrated TM
maxim
integrated
TM
A Few Helpful Guidelines from Tech Pubs
A Few Helpful
Guidelines from
Tech Pubs
Rectangles in technical drawings should be made with square c...
·
Rectangles
in technical
drawings should be made
with
square
corners
,
not
rounded
Do not use the bold font except when writing a Maxim part num...
·
Do not use the bold font
except when writing a
Maxim part number or a
major component block
(
Maxim part number
should be in
ARIAL
BOLD
in
8
point
)
·
Use the
Component
Library
provided
.
Please
do not resize components
Please keep your drawing within the area shown to ensure your...
·
Please keep your drawing
within the area shown to
ensure your drawing fits
into the layout
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS All Tex...
ALL TEXT IN THE TEMPLATE SHOULD BE IN CAPITAL LETTERS
All Text
must
use the
ARIAL NARROW
font
.
The size must be
7
point
.
This is the default style
Line weights
should be
0
.
5
point
which is already set in the components
Subscripts
should be set at
9
point
in combination with the subscript position under FONT
Superscripts
should be set at
9
point
in combination with the superscript position under FONT
IMPORTANT
!
YOU
MUST
USE THE COMPONENT LIBRARY
Use the provided component library
.
Figures in the component library have already been drawn
with
0
.
5
point width
.
Use the library
,
prevent rework
!
All figures should be set to “no fill,” with no colors or sha...
·
All figures should be set
to
“
no fill
,
”
with
no
colors
or
shading
and no
logos
.
Consult Technical
Publications first if you
must use colors or
shading in a drawing
.
·
Do not use gradation on
any line
.
·
Place drawing near the
center of page
.
No need
to crop
.
Leave it on full
page
Save yourself Some time! Under HOME, set the FILL to “NO FILL...
SAVE YOURSELF
SOME TIME
!
Under
HOME
,
set the
FILL
to
“
NO FILL
”
BEFORE
you begin
working
.
This will avoid having
to drop the fill out
each time
you draw a component
Figures must be built using the components from the template ...
FIGURES
MUST
BE BUILT USING THE COMPONENTS FROM THE TEMPLATE LIBRARY
Figures created from Visio and dropped into the template
do not qualify
as using the Tech Pubs template
.
FYI
:
Use of any unofficial Visio template will not be accepted for
any
data sheet submission
Not using this template will delay the production of your data sheet
.
OfficialVisioTemplateByTechPubs (REV02A)
OfficialVisioTemplateByTechPubs (
REV
02
A
)
MAX25231ATCD
MAX25231ATCD
Bootstrap Pin for HS Driver. It is recommended to use 0.1μF from BST to LX.
BST
BST
Buck Switching Node. High impedance when part is off. Connect a 4.7μH inductor between LX and OUT.
LX
LX
Buck Regulator Output-Voltage-Sense Input. Bypass OUT to PGND with 22μF ceramic capacitor.
OUT
OUT
Feedback Pin. Connect a resistor-divider from OUT to FB to ground for external adjustment of the output voltage (MAX25231ATCD only). Connect to bias for internal fixed voltage configurations.
FB
FB
5V Internal BIAS Supply. Connect a 1μF (min) ceramic capacitor to AGND.
BIAS
BIAS
Supply Input. Connect a 4.7μF ceramic capacitor from SUP to PGND.
SUP
SUP
Sync Input. If connected to ground or open, skip-mode operation is enabled under light loads; if connected to BIAS, forced-PWM mode is enabled. This pin has a 1MΩ internal pulldown.
SYNC
SYNC
High-Voltage-Compatible Enable Input. If this pin is low, the part is off.
EN
EN
Open-Drain Reset Output. External pullup required.
PGOOD
PGOOD
Spread-Spectrum Enable. Connect logic-high to enable spread spectrum of internal oscillator or logic-low to disable spread spectrum. This pin has a 1MΩ internal pulldown.
SPS
SPS
Power Ground. Ground return path for all high-current/high-frequency noisy signals.
PGND
PGND
Analog Ground. Ground return path for all ‘quiet’ signals.
AGND
AGND
NH
NH
NL
NL
COUT 22µF
C
OUT
22
µF
CBST 0.1µF
C
BST
0
.1µF
L 4.7µH
L
4
.7µH
CBIAS 1µF
C
BIAS
1
µF
CIN 4.7µF
C
IN
4
.7µF
RFB1
R
FB
1
RFB2
R
FB
2
