LTC2904 データシートの表示（PDF） - Linear Technology
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LTC2904 Datasheet PDF : 16 Pages
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LTC2904/LTC2905
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V1 = 2.5V, V2 = 1V, S1 = TOL = V1, S2 = 0V, unless otherwise noted.
(Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VRT50
5V, 5% Reset Threshold
5V, 7.5% Reset Threshold
5V, 10% Reset Threshold
V1 Input Threshold
l 4.600 4.675 4.750
V
l 4.475 4.550 4.625
V
l 4.350 4.425 4.500
V
VRT33
3.3V, 5% Reset Threshold
3.3V, 7.5% Reset Threshold
3.3V, 10% Reset Threshold
V1, V2 Input Threshold
l 3.036 3.086 3.135
V
l 2.954 3.003 3.053
V
l 2.871 2.921 2.970
V
VRT25
2.5V, 5% Reset Threshold
2.5V, 7.5% Reset Threshold
2.5V, 10% Reset Threshold
V1, V2 Input Threshold
l 2.300 2.338 2.375
V
l 2.238 2.275 2.313
V
l 2.175 2.213 2.250
V
VRT18
1.8V, 5% Reset Threshold
1.8V, 7.5% Reset Threshold
1.8V, 10% Reset Threshold
V2 Input Threshold
l 1.656 1.683 1.710
V
l 1.611 1.638 1.665
V
l 1.566 1.593 1.620
V
VRT15
1.5V, 5% Reset Threshold
1.5V, 7.5% Reset Threshold
1.5V, 10% Reset Threshold
V2 Input Threshold
l 1.380 1.403 1.425
V
l 1.343 1.365 1.388
V
l 1.305 1.328 1.350
V
VRT12
1.2V, 5% Reset Threshold
1.2V, 7.5% Reset Threshold
1.2V, 10% Reset Threshold
V2 Input Threshold
l 1.104 1.122 1.140
V
l 1.074 1.092 1.110
V
l 1.044 1.062 1.080
V
VRT10
1V, 5% Reset Threshold
1V, 7.5% Reset Threshold
V2 Input Threshold
l 0.920 0.935 0.950
V
l 0.895 0.910 0.925
V
1V, 10% Reset Threshold
l 0.870 0.885 0.900
V
VCCMIN
Minimum Internal Operating Voltage (Note 2) RST in Correct Logic State
l
1
V
IV1
V1 Input Current
Includes Input Current to Three-State Pins l
65
130
μA
IV2
V2 Input Current
l
0.4
1.0
μA
ITMR(UP)
ITMR(DOWN)
TMR Pull-Up Current
TMR Pull-Down Current
LTC2905
LTC2905
LTC2905H
VTMR = 0V
VTMR = 1.4V
l –1.5 –2.1 –2.7
μA
l 1.5
2.1
2.7
μA
l 1.4
2.0
2.7
μA
tRST
Reset Timeout Period
LTC2904
l 140
200
260
ms
tRST
Reset Timeout Period
LTC2905
CTMR = 22nF
LTC2905H
l 140
200
260
ms
l 140
295
ms
tUV
Vx Undervoltage Detect to
RST or RST
VOL
Output Voltage Low RST, RST
VOH
Output Voltage High RST, RST
(Notes 2, 5)
Vx Less than Reset Threshold VRTX
by More than 1%
150
μs
I = 2.5mA
l
0.15 0.4
V
I = 100μA; V1 = 1V (RST Only)
l
0.05 0.3
V
I = –1μA
l VCC–1
V
Three-State Inputs S1, S2, TOL
VIL
Low Level Input Voltage
VIH
High Level Input Voltage
VZ
Pin Voltage When Left in Open State
I = –10μA
I = 0μA
I = 10μA
l
0.4
V
l 1.4
V
l 0.7
V
0.9
V
l
1.1
V
2905H
I = –10μA
I = 0μA
I = 10μA
l 0.65
V
0.9
V
l
1.15
V
IVPG
Programming Input Current (Note 6)
l
±25
μA
29045fd
3
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