LTC2908
ELECTRICAL CHARACTERISTICS
otherwise noted. (Notes 2, 3)
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VCC = 5V for the LT2908-A1 and VCC = 3.3V for the LTC2908-B1, unless
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
Internal Operating Voltage
V1 Input Current
RST in Correct Logic State
●
0.5
6
V
CC
I
I
I
I
V1 = 5.0V (LTC2908-A1) (Note 4)
V1 = 3.3V (LTC2908-B1)
●
●
26
24
50
50
µA
µA
V1
V2 Input Current
V3 Input Current
V4 Input Current
V2 = 3.3V (LTC2908-A1) (Note 4)
V2 = 2.5V (LTC2908-B1)
●
●
10
8
20
20
µA
µA
V2
V3
V4
V3 = 2.5V (LTC2908-A1)
V3 = 1.8V (LTC2908-B1)
●
●
2
2
5
5
µA
µA
V4 = 1.8V (LTC2908-A1)
V4 = 1.5V (LTC2908-B1)
●
●
2
2
5
5
µA
µA
I
t
t
V
, V
Input Current
V
= V = 0.55V
ADJ2
●
●
±15
nA
ms
µs
VADJ
RST
UV
ADJ1 ADJ2
ADJ1
Reset Time-Out Period
160
200
250
260
V Undervoltage Detect to RST or RST
V Less Than Reset Threshold V
More Than 1%
by
RTX
X
X
V
V
Output Voltage High RST (Note 5)
Output Voltage Low RST
I
I
= –1µA, V = 5V (LTC2908-A1)
●
●
V
V
– 1.5
– 1.0
V
V
OH
OL
RST
RST
CC
CC
CC
= –1µA, V = 3.3V (LTC2908-B1)
CC
V
V
V
= 0.5V, I
= 1.0V, I
= 3.0V, I
= 5µA
= 100µA
= 2500µA
●
●
●
0.01
0.01
0.10
0.15
0.15
0.30
V
V
V
CC
CC
CC
RST
RST
RST
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 4: Under typical operating conditions, most of the quiescent current
is drawn from the V1 input. When V2 exceeds V1, V2 supplies most of the
quiescent current.
Note 2: The greater of V1, V2 is the internal supply voltage (V ).
CC
Note 5: The output pin RST has an internal pull-up to V of typically 6µA.
However, an external pull-up resistor may be used when a faster rise time
CC
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
is required or for V voltages greater than V
.
CC
OH
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Specifications are at TA = 25°C unless otherwise noted.
5V Threshold Voltage
vs Temperature
3.3V Threshold Voltage
vs Temperature
2.5V Threshold Voltage
vs Temperature
4.750
4.725
4.700
4.675
4.650
4.625
4.600
3.135
3.115
3.095
3.075
3.055
3.035
2.375
2.360
2.345
2.330
2.315
2.300
50
TEMPERATURE (°C)
100
50
TEMPERATURE (°C)
100
50
TEMPERATURE (°C)
100
–50 –25
0
25
75
–50 –25
0
25
75
–50 –25
0
25
75
2908 G01
2908 G02
2908 G03
sn2908 2908fs
3
Linear Systems [ Linear Systems ]
