MB3771PF Fujitsu Microelectronics, Inc., MB3771PF Datasheet - Page 8

• Manufacturer Part Number: MB3771PF
• Description: Power Supply Monitor
• Manufacturer: Fujitsu Microelectronics, Inc.

8
MB3771
3. Arbitrary Voltage Supply Monitor
Note : Hysteresis of 28 mV at V
(2) Monitoring V
(1) Case: V
V
• Detection Voltage can be set by R
• Connect Pin 7 to V
• Pin 7 can be opened when V
• Detection Voltage can be set by R
• The RESET signal output is : = 0V (low level) and : = 5 V (high level). V
• Changing the resistance ratio between R
• The 5 V output can be used as a power supply for control circuits with low current consumption.
• In setting the R
• Values are actual measured values (using I
CC
140
100
Power Dissipation can be reduced.
Detection Voltage = (R
Do not pull up RESET to V
voltage of the high level RESET output. Note that the constant voltage output should not exceed 18 V.
below lists sample resistance values for reference (using 1/4
reduces the minimum supply voltage of the RESET output, but requires resistance with higher allowable loss.
40
Detection Voltage = (R
Hysteresis width dose not depend on (R
(V)
CC
voltage
Detection
CC
100
18 V
81
33
3
V
> 18 V
resistance level, caution should be given to the power consumption in the resistor. The table
CC
(V)
CC
when V
V
C
1
1
power supply voltage (V)
CC
C
T
+ R
+ R
T
SB
CC
RESET Output min.
2
2
.
)
CC
at termination is available.
)
CC
100 k
R
33 k
R
less than 4.45 V.
greater than 4.45 V
V
V
5
4
SB
SB
1
1
and R
and R
/R
/R
6.7
3.8
1.4
0.47 F
2
1
2
3
4
2
MB3771
4
2
2
1
and R
.
OUTC
+ R
1
2
3
4
8
7
6
5
2
).
= 100 A, V
5
changes the constant voltage output, thereby changing the
8
7
6
5
R
3
R
1
0.51
1.6
1.3
(M )
OLC
R
R
R
R
1
2
1
2
= 0.4 V). Lowering the resistance value of R
resistance).
R
RESET
2
CC
5 V output(Stablized)
RESET
20
20
20
(k )
voltage cannot be output.
R
3
110
56
11
(k )
Output Current
(mA)
< 0.2
< 0.5
< 1.6
3