Electrical characteristics (continued) – Rainbow Electronics MAX16040 User Manual
Page 4
MAX16033–MAX16040
Low-Power Battery Backup
Circuits in Small µDFN Packages
4
_______________________________________________________________________________________
Note 1: All devices are 100% production tested at T
A
= +25°C. All overtemperature limits are guaranteed by design.
Note 2: V
BATT
can be 0V any time, or V
CC
can go down to 0V if V
BATT
is active (except at startup).
Note 3: Positive current flows into BATT.
Note 4: Guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.25V to 5.5V, V
BATT
= 3V, RESET not asserted, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
=
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
WATCHDOG (MAX16034/MAX16038)
Watchdog Timeout Period
t
WD
1.00
1.65
2.25
s
M i ni m um WD I Inp ut P ul se W i d th
t
WDI
(Note 4)
100
ns
V
IL
0.3 x
V
CC
WDI Input Voltage
V
IH
0.7 x
V
CC
V
WDI Input Current
-1.0
+1.0
µA
BATTON (MAX16035/MAX16039)
Output Voltage
V
OL
I
SINK
= 3.2mA, V
BATT
= 2.1V
0.4
V
Sink current, V
CC
= 5V
60
mA
Output Short-Circuit Current
Source current, V
BATT
>
2V
10
30
120
µA
RESETIN (MAX16036/MAX16040)
RESETIN Threshold
V
RTH
1.185
1.235
1.285
V
RESETIN Input Current
0.01
25
nA
RESETIN to Reset Delay
(V
RTH
+ 100mV) to (V
RTH
- 100mV)
1.5
µs
CHIP-ENABLE GATING (MAX16033–MAX16036)
CEIN Leakage Current
RESET asserted
±1
µA
CEIN to CEOUT Resistance
RESET not asserted, V
CC
= V
TH(MAX),
V
CEIN
= V
CC
/ 2, I
SINK
= 10mA
100
Ω
CEOUT Short-Circuit Current
RESET asserted, V
CEOUT
= 0V
1
2.0
mA
V
CC
= 4.75V
1.5
7
CEIN to CEOUT Propagation
Delay (Note 4)
50
Ω source impedance driver,
C
LOAD
= 50pF
V
CC
= 3.15V
2
9
ns
V
CC
= 5V, V
CC
> V
BATT
, I
SOURCE
= 100µA
0.7 x
V
CC
CEOUT Output-Voltage High
V
CC
= 0V, V
BATT
> 2.2V, I
SOURCE
= 1µA
V
BATT
- 0.1
V
RESET to CEOUT Delay
1
µs