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MAX6774 Datasheet(PDF) 3 Page - Maxim Integrated Products

No. de Pieza. MAX6774
Descripción  MAX6765 Evaluation Kit
Descarga  5 Pages
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Fabricante  MAXIM [Maxim Integrated Products]
Página de inicio  http://www.maxim-ic.com
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MAX6774 Datasheet(HTML) 3 Page - Maxim Integrated Products

   
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MAX6765 Evaluation Kit
_______________________________________________________________________________________
3
PARTS CHANGED
PARTS
DESCRIPTION
R2
R3
J2
J3
J5, R5, R6
MAX6765/MAX6766
Unmodified EV kit
Open
MAX6767/MAX6768
Pin 4 is the
HOLD input
Open
Add jumper to
control
HOLD
Open
MAX6769/MAX6770
Pin 4 is the
RESETIN comparator
Add resistive divider to set
the comparator threshold
Open
MAX6771/MAX6772
Pin 4 is the second
enable
Open
Add jumper
to second
enable
MAX6773/MAX6774
Pin 4 is the watchdog
timer input
Add 100k
Ω
pulldown
resistor
Open
See Adjustable
Output section
Table 2. EV Kit Modifications
Evaluating the
MAX6766–MAX6774
This EV kit can also be used to evaluate the MAX6766–
MAX6774. The MAX6766 uses the 6-pin TDFN footprint
(U1) on the EV kit and the MAX6767–MAX6774 use the
8-pin TDFN footprint (U1a). Each of these parts shares
the same pin connections except for pin 4. R2, R3, J2,
and J3 work differently depending on the part. See Table
2 for the modifications needed for a particular part.
RESETIN Comparator
The MAX6769/MAX6770 have a RESETIN comparator
that asserts
RESET if the voltage falls below the com-
parator threshold. The threshold voltage on IN can be
set using the following formula:
where VTH is either 1.085V (M/S/Y/V suffixes) or 1.147V
(L/T/Z/W suffixes) and R3 and R2 are
≤ 200kΩ. Do not
exceed the 12V absolute maximum rating for RESETIN.
Adjustable Output
With the MAX6767–MAX6774, OUT provides regulated
DC at a voltage set by jumper J5, which selects either
the fixed output voltage or the output voltage set by
resistive dividers R5 and R6. This can easily be
changed according to the following equation:
where VSET = 1.233V and R5 and R6 are ≤ 200kΩ.
VV
R
R
OUT
SET
=+
⎝⎜
⎠⎟
1
6
5
VV
R
R
IN TH
TH
_
=+
⎝⎜
⎠⎟
1
3
2


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