參數(shù)資料
型號: MAX6459UT_-T
廠商: Maxim Integrated Products, Inc.
英文描述: High-Voltage, Low-Current Voltage Monitors in SOT Packages
中文描述: 高電壓,低電流電壓監(jiān)測器采用SOT封裝
文件頁數(shù): 13/15頁
文件大?。?/td> 232K
代理商: MAX6459UT_-T
M
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
______________________________________________________________________________________
13
Chip Information
TRANSISTOR COUNT: 785
PROCESS: BiCMOS
GND
IN+
1
5
V
CC
OUT
MAX6457
SOT23
TOP VIEW
2
3
4
GND
IN-
IN+
1
6
V
CC
5
OUTB
OUTA
MAX6459
SOT23
2
3
4
GND
IN-
IN+
1
5
V
CC
OUT
MAX6458
SOT23
2
3
4
GND
IN-
IN+
1
6
V
CC
5
REF
OUT
MAX6460
SOT23
2
3
4
CLEAR
Pin Configurations
4) Calculate R1
Monitoring Voltages Other than V
CC
The MAX6457
MAX6460 can monitor voltages other than
V
CC
(Figure 12). Calculate V
TRIP
as shown in the
Programming the Trip Voltage
section. The monitored volt-
age (V
MON
) is independent of V
CC
. V
IN
+ must be within
the specified operating range: 0 to V
CC
.
Interfacing to Voltages Other than V
CC
The open-drain outputs of the MAX6457
MAX6460
allow the output voltage to be selected independent of
V
CC
. For systems requiring an output voltage other than
V
CC
, connect the pullup resistor between OUT, OUTA, or
OUTB and any desired voltage up to 28V (see Figure 13).
Monitoring Negative Voltages
Figure 14 shows the typical application circuit for moni-
toring negative voltages (V
NEG
) using the MAX6460.
Select a value for R1 between 25k
and 1M
. Use the
following equation to select R2:
where V
REF
= 2.25V and V
NEG
< 0. V
IN
+ must always
be within the specified operating range: 0 to V
CC
.
R
R
V
V
NEG
REF
2
1
×
=
-
R
R
4 2
3 94067
R
223 273
.
R
M
k
k
M
TOTAL
.
1
2
3
36 06
.
=
=
=
-
-
-
-
R
V
R
V
R
V
18 9
M
V
k
k
TH
TOTAL
TRIPLOW
1 167
2
3
223 273
.
36 06
.
=
×
=
=
-
-
-
) (4 2
.
)
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