LTC695-3.3_15 Datasheet, PDF (6/20 Pages) Linear Technology – 3.3V Microprocessor Supervisory Circuits

LTC694-3.3/LTC695-3.3
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs Load Current
3.30
V_CC = 3.3V
V_BATT = 2.4V
3.25
T_A = 25°C
3.20
SLOPE = 4.6Ω
3.15
3.10
3.05
3.00
0
10
20
30
40
50
LOAD CURRENT (mA)
694/5-3.3 G01
Power-Fail Comparator
Response Time
3.5
3.0
V_CC = 3.3V
T_A = 25°C
2.5
2.0
V_PFI +
1.5
1.3V –
PFO
30pF
1.0
0.5
0
1.305V
1.285V
V_PFI = 20mV STEP
01 2 34 567 89
TIME (μs)
694/5-3.3 G04
Reset Active Time
vs Temperature
220
V_CC = 3.3V
210
200
190
180
170
160
150
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
694/5-3.3 G07
Output Voltage vs Load Current
2.40
V_CC = 0V
V_BATT = 2.4V
2.39
T_A = 25°C
2.38
SLOPE = 90Ω
2.37
2.36
2.35
0
100 200 300 400 500
LOAD CURRENT (μA)
694/5-3.3 G02
Power-Fail Comparator
Response Time
3.5
3.0
V_CC = 3.3V
T_A = 25°C
2.5
2.0
1.5
V_PFI +
PFO
1.0
1.3V –
30pF
0.5
0
1.315V
1.295V
V_PFI = 20mV STEP
0 20 40 60 80 100 120 140 160 180
TIME (μs)
694/5-3.3 G05
Reset Voltage Threshold
vs Temperature
2.90
V_CC = 3.3V
2.89
2.88
2.87
2.86
2.85
2.84
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
694/5-3.3 G08
Power Failure Input Threshold
vs Temperature
1.310
V_CC = 3.3V
1.308
1.306
1.304
1.302
1.300
1.298
1.296
1.294
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
694/5-3.3 G03
Power-Fail Comparator
Response Time with Pull-Up
Resistor
3.5
3.0
V_CC = 3.3V
T_A = 25°C
2.5
2.0
3.3V
1.5
1.0
V_PFI +
10k
PFO
0.5
1.3V –
30pF
0
1.315V
1.295V
V_PFI = 20mV STEP
0 2 4 6 8 10 12 14 16 18
TIME (μs)
694/5-3.3 G06
RESET Output Voltage
vs Supply Voltage
5
4
3
2
1
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
694/5-3.3 G09
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