LTC2935 查看數據表（PDF） - Linear Technology
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LTC2935 Datasheet PDF : 12 Pages
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LTC2935
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VCC = 3.6V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC
VCC Input Supply Voltage
ICC
VCC Input Supply Current
Reset Thresholds (LTC2935-1/LTC2935-2)
l
5.5
V
l 225 500 1000
nA
VRTF1
Reset Threshold 1 (VCC Falling)
VRTF2
Reset Threshold 2 (VCC Falling)
VRTF3
Reset Threshold 3 (VCC Falling)
VRTF4
Reset Threshold 4 (VCC Falling)
VRTF5
Reset Threshold 5 (VCC Falling)
VRTF6
Reset Threshold 6 (VCC Falling)
VRTF7
Reset Threshold 7 (VCC Falling)
VRTF8
Reset Threshold 8 (VCC Falling)
ΔVRTF
Reset Threshold Differential VRTF(N+1) – VRTF(N)
VRT(HYST) Reset Threshold Hysteresis (VCC Rising)
tUVR
Undervoltage Detect to RST Falling
Reset Thresholds (LTC2935-3/LTC2935-4)
S2 = Low : S1 = Low : S0 = Low
S2 = Low : S1 = Low : S0 = High
S2 = Low : S1 = High : S0 = High
S2 = Low : S1 = High : S0 = Low
S2 = High : S1 = High : S0 = Low
S2 = High : S1 = Low : S0 = Low
S2 = High : S1 = Low : S0 = High
S2 = High : S1 = High : S0 = High
(Note 3)
Relative to Any Selected Reset Threshold
VCC Below Threshold by 1% (Note 3)
l 3.251 3.300 3.349
V
l 3.103 3.150 3.197
V
l 2.955 3.000 3.045
V
l 2.808 2.850 2.892
V
l 2.660 2.700 2.740
V
l 2.512 2.550 2.588
V
l 2.364 2.400 2.436
V
l 2.217 2.250 2.283
V
l 142 150 158
mV
l 4.5
5
6
%
1
ms
VRTF1
Reset Threshold 1 (VCC Falling)
VRTF2
Reset Threshold 2 (VCC Falling)
VRTF3
Reset Threshold 3 (VCC Falling)
VRTF4
Reset Threshold 4 (VCC Falling)
VRTF5
Reset Threshold 5 (VCC Falling)
VRTF6
Reset Threshold 6 (VCC Falling)
VRTF7
Reset Threshold 7 (VCC Falling)
VRTF8
Reset Threshold 8 (VCC Falling)
ΔVRTF
Reset Threshold Differential VRTF(N+1) – VRTF(N)
VRT(HYST) Reset Threshold Hysteresis (VCC Rising)
tUVR
Undervoltage Detect to RST Falling
Power-Fail Thresholds (LTC2935-1/LTC2935-2)
S2 = Low : S1 = Low : S0 = Low
S2 = Low : S1 = Low : S0 = High
S2 = Low : S1 = High : S0 = High
S2 = Low : S1 = High : S0 = Low
S2 = High : S1 = High : S0 = Low
S2 = High : S1 = Low : S0 = Low
S2 = High : S1 = Low : S0 = High
S2 = High : S1 = High : S0 = High
(Note 3)
Relative to Any Selected Reset Threshold
VCC Below Threshold by 1% (Note 3)
l 2.404 2.440 2.476
V
l 2.286 2.320 2.354
V
l 2.167 2.200 2.233
V
l 2.049 2.080 2.111
V
l 1.931 1.960 1.989
V
l 1.813 1.840 1.867
V
l 1.695 1.720 1.745
V
l 1.576 1.600 1.624
V
l 112 120 128
mV
l 4.5
5
6
%
1
ms
ΔVPFT
Power-Fail Threshold Differential VPFT(N) – VRTF(N) Any Selected Reset Threshold (VCC Falling) l 100 150 200
mV
VPFT(HYST) Power-Fail Threshold Hysteresis
tUVP
Undervoltage Detect to PFO Falling
Relative to Any Selected Power-Fail Threshold l 2
2.5 3.5
%
(VCC Rising)
VCC Below Threshold by 1% (Note 3)
1
ms
Power-Fail Thresholds (LTC2935-3/LTC2935-4)
ΔVPFT
Power-Fail Threshold Differential VPFT(N) – VRTF(N) Any Selected Reset Threshold (VCC Falling) l 70
120 170
mV
VPFT(HYST) Power-Fail Threshold Hysteresis
tUVP
Undervoltage Detect to PFO Falling
Control Inputs: MR, S2, S1, S0
Relative to Any Selected Power-Fail Threshold l 2
2.5
3
%
(VCC Rising)
VCC Below Threshold by 1% (Note 3)
1
ms
VIN(TH)
tPW
tPD
RPU
ILK
Control Input Threshold
Input Pulse Width
Propagation Delay to RST Falling
Internal Pull-Up Resistance
Input Leakage Current
S2, S1, S0
MR
MR
Manual Reset Falling
MR
S2, S1, S0 = VCC or GND
l 0.3 • VCC
l 0.4
0.7 • VCC
V
1.4
V
l 20
μs
l2
5
20
μs
l 600 900 1200
kΩ
l
±1 ±10
nA
2935fa
3
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