MAX703 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX703 Datasheet PDF : 10 Pages
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MAX703/MAX704
Low-Cost Microprocessor Supervisory
Circuits with Battery Backup
Electrical Characteristics (continued)
(VCC = +4.75V to +5.5V for MAX703, VCC = +4.5V to +5.5V for MAX704, VBATT = 2.8V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
MR Input Threshold
MR Pulse Width
MR to RESET Delay
MR Pullup Current
PFI Input Threshold
PFI Input Current
SYMBOL
VIL
VIH
tMR
tMD
Low
High
MR = 0V
VCC = 5V
CONDITIONS
MIN TYP MAX UNITS
0.8
V
2.0
150
ns
250
ns
100
250
600
µA
1.20 1.25 1.30
V
-25 +0.01 +25
nA
PFO Output Voltage
VOH
ISOURCE = 800µA
VOL
ISINK = 3.2mA
Note 2: Either VCC or VBATT can go to 0V if the other is greater than 2.0V.
Note 3: “-” = battery-charging current, “+” = battery-discharging current.
VCC -
1.5
V
0.4
Typical Operating Characteristics
(VCC = +5V, VBATT = 2.8V, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE vs. LOAD CURRENT
5.00
VCC = +5V
VBATT = +2.8V
4.95
TA = +25°C
4.90
SLOPE = 5Ω
4.85
4.80
4.75
0
10
20
30
40
50
IOUT (mA)
OUTPUT VOLTAGE vs. LOAD CURRENT
2.80
VCC = 0V
VBATT = +2.8V
2.78
TA = +25°C
2.76
2.74
SLOPE = 80Ω
2.72
2.70
0
0.2 0.4 0.6 0.8 1.0
IOUT (mA)
MAX703 RESET OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
MAX703 toc03 +5V
VBATT = 0V
TA = +25°C
VCC
1V/div
OV
RESET
0V
+5V
2kΩ
VCC
VCC
RESET
RESET
1V/div
GND
330pF
500ms/div
MAX703 RESET RESPONSE TIME
MAX703 toc04
+5V
VCC
+5V
+4V
PFO
+5V
1V/div
RESET VCC
VCC
RESET
GND
10kΩ
TA = +25ºC
RESET
30pF
0V
2µs/div
+1.30V
PFI
POWER-FAIL COMPARATOR
RESPONSE TIME
MAX703 toc05
+5V
PFI
1kΩ
PFO
PFO
30pF
0V
0V
1.25V
VCC = +5V
TA = +25°C
+1.20V
PFI
+1.20V
POWER-FAIL COMPARATOR
RESPONSE TIME
MAX703 toc06
PFI
+5V
PFO
VCC = +5V
TA = +25°C
+3V
30pF
1kΩ
1.25V
+1.30V
400ns/div
400ns/div
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