MAX16048ETN+ Maxim Integrated Products, MAX16048ETN+ Datasheet - Page 59

• Manufacturer Part Number: MAX16048ETN+
• Description: IC EE-PROG SYS MGR 8CH 56-TQFN
• Manufacturer: Maxim Integrated Products
• Type: System Managerr

Specifications of MAX16048ETN+

• Number Of Voltages Monitored: 8
• Output: Open Drain, Push-Pull
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-TQFN
• Manual Reset: Resettable
• Watchdog: Yes
• Supply Voltage (max): 14 V
• Supply Voltage (min): 3 V
• Supply Current (typ): 6500 uA
• Maximum Power Dissipation: 3810 mW
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Some applications require filtering of the DAC outputs.
This is especially necessary in applications that require
a large distance between the power supplies to be
margined and the MAX16046/MAX16048, or those that
require immunity to noise. A simple RC filter may be
inserted (see Figure 16).
The calculations change slightly for this configuration.
For DC margining calculations, R
culate the lowpass cutoff frequency, use the following
formula:
Place resistor R
possible to the feedback node.
To connect the MAX16046/MAX16048 to a power sup-
ply using the trim input method, see Figure 17.
Calculate the output voltage, V
where V
ply; R
power supply; R
ing the trim input to the DACOUT_ output; and
V
Figure 15. Connections for Margining Using Feedback Method
DACOUT_
System Managers with Nonvolatile Fault Registers
V
OUT
1
, R
REF
DC-DC OR LDO
=
2
is the output voltage of the DACOUT_ output.
12-Channel/8-Channel EEPROM-Programmable
⎛
⎜
⎝
, R
1
is the reference voltage of the power sup-
V
+
REF
3
R
R
, and R
5
3A
1
2
is an optional series resistor connect-
______________________________________________________________________________________
⎞
⎟
⎠
and the capacitor, C, as close as
⎛
⎜
⎝
OUT
f
FB
R V
=
3 DACOUT_
4
2 R
π
are resistors internal to the
R
R
1
Filtering the DAC Outputs
1
2
3B
R
OUT
C
R
3
3
3
+
, as follows:
= R
R
+
Trim Input Method
4 4
(R
+
3A
4
R
+
MAX16046
MAX16048
5
+ R
R )V
V
5 REF
DACOUT_
3B
. To cal-
⎞
⎟
⎠
Calculate the ratio of R
mula:
Resistors R
may be derived from the formulas given in the DC-DC
converter data sheet where trim input functionality is
discussed. DC-DC module data sheets usually include
trim-up and trim-down formulas in the following form:
where ∆ is the fraction of the total correction.
Another form of trim-up and trim-down formulas may
appear as follows:
Figure 16. DACOUT Filter
TRIM DOWN:R
TRIM UP:R
TRIM DOWN:R
TRIM UP:R
DC-DC OR LDO
ADJ_UP
ADJ_UP
V
REF
3
ADJ_DOWN
ADJ_DOWN
and R
( )
( )
⎛
⎜
⎝
OUT
k
k
1
Ω
FB
Ω
−
+
⎛
⎜
⎜
⎝
=
4
=
R
R
R
⎛
⎜
⎜
⎝
( )
3
⎛
⎜
⎝
1
2
and the reference voltage V
k
( )
V
R
R
1
k
Ω
( )
V
OUT_NO
1
2
k
⎞
⎟ =
⎠
Ω
R
OUT_NOM
Ω Ω
and R
3A
=
V
=
REF
×
⎛
⎜
⎝
V
R
100
⎛
⎝ ⎜
OUT_NOM
3
1
M M
V
−
( )
∆
2
k
(
+
REF
R
C
∆
Ω
∆
V
using the following for-
(
R
3
REF
%
−
R
⎞
⎠ ⎟
3B
( )
1
∆
R
×
4
k
⎞
⎟
⎠ ⎠
%
100
3
Ω
( )
∆
⎛
⎝ ⎜
k
( )
%
Ω
1
k
×
−
Ω
∆
−
(
+
∆
100
(
R
R
−
⎞
⎠ ⎟
4
3
R
R
MAX16046
MAX16048
( )
+
( )
4
3
k
k
∆
Ω
Ω ∆
( )
( )
%
k k
k
V
Ω
Ω
)
+ +
)
DACOUT_
)
R
⎞
⎟
⎟
⎠
%
−
3
R
⎞
⎟
⎟
⎠
( )
k
4
Ω
REF
(
k
59
)
Ω