MB3771PF Fujitsu Microelectronics, Inc., MB3771PF Datasheet - Page 12

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

12
MB3771
(2) 5 V Reference Voltage Generation and 5V Monitoring (No.1)
(3) 5 V Reference Voltage Generation and 5 V Monitoring (No. 2)
(4) 1.245 V Reference Voltage Generation and 5 V Monitoring
In the above examples, the output voltage and the detection voltage are determined by the following equations:
The value of R
R
Resistor R
3
, and the 5 V output current. The table below provides sample resistance values for reference.
Detection Voltage = 4.2 V
Output Voltage = (R
1
determines Reference current. Using 1.2 k as R
V
CC
1
40
24
15
(5 V)
should be calculated from the current consumption of the MB3771, the current flowing at R
V
GND
(V)
CC
15 V
0.47 F
GND
V
C
3
CC
T
+ R
C
C
T
4
)
0.47 F
T
V
SC
/R
R
R
100 k
3
2
4
: 33 k
:
1
2
3
4
MB3771
R
1
1
2
3
4
R
: 10 k
5
: 3 k
8
7
6
5
1
2
3
4
R
1
6.2
4.7
11
8
7
6
5
(k )
8
7
6
5
R
R
3
4
1
: 3.6 k
: 1.2 k
R
0.47 F
, reference current is about 2 mA.
1
RESET
5 V( 50 mA)
RESET
Reference Voltage
1.245V typ.
RESET
5 V
Output Current
< 1.6
< 1.4
< 0.6
(mA)
2
and