Datasheet

4.75
0
OUTPUT VOLTAGE
vs. LOAD CURRENT
4.80
5.00
I
OUT
(mA)
V
OUT
(V)
40
4.90
4.85
10 30 50
4.95
20
V
CC
= +5V
V
BATT
= +2.8V
T
A
= +25°C
SLOPE = 5Ω
MAX690A-MAX805L toc01
MAX690A
RESET RESPONSE TIME
2µs/div
V
CC
+5V
RESET
+5V
+4V
1V/div
0V
T
A
= +25°C
V
CC
V
CC
GND
RESET
10k
RESET
30pF
MAX690A-MAX805L toc04
MAX805L RESET OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
500ms/div
0V
V
CC
+5V
1V/div
RESET
0V
+5V
1V/div
10k
330
pF
V
CC
RESET
GND
V
BATT
MAX690A-MAX805L toc07
MAX805L
RESET RESPONSE TIME
2µs/div
0V
V
CC
+4V
0V
+4V
+5V
GND
RESET
V
CC
330pF
10k
MAX690A-MAX805L toc08
2.70
0
OUTPUT VOLTAGE
vs. LOAD CURRENT
2.72
2.80
I
OUT
(mA)
V
OUT
(V)
0.8
2.76
2.74
0.2 0.6 1.0
2.78
0.4
V
CC
= 0V
V
BATT
= +2.8V
T
A
= +25°C
SLOPE = 80Ω
MAX690A-MAX805L toc02
POWER-FAIL COMPARATOR
RESPONSE TIME
400ns/div
PFI
+1.30V
PFO
+5V
+0V
+1.2V
+5V
PFO
30pF
1k
+1.25V
PFI
V
CC
= +5V
T
A
= +25°C
MAX690A-MAX805L toc05
MAX690A RESET OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
500ms/div
V
CC
0V
RESET
0V
+5V
1V/div
+5V
1V/div
T
A
= +25°C
V
BATT
= OV
V
CC
V
CC
GND
RESET
2k
RESET
330pF
MAX690A-MAX805L toc03
POWER-FAIL COMPARATOR
RESPONSE TIME
400ns/div
PFI
+1.20V
PFO
0V
+3V
+1.3V
V
CC
= +5V
T
A
= +25°C
+5V
PFO
30pF 1k
+1.25V
PFI
MAX690A-MAX805L toc06
MAX690A/MAX692A/
MAX802L/MAX802M/
MAX805L
Microprocessor Supervisory Circuits
Maxim Integrated │ 4
www.maximintegrated.com
Typical Operating Characteristics