LTC2908
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Specifications are at TA = 25°C unless otherwise noted.
RST Output Voltage vs V1 with
10k Pull-Up Resistor to V1
RST Output Voltage vs V1 with
10k Pull-Up Resistor to V1
RST Pull-Down Current (IRST
vs Supply Voltage (VCC
)
)
6
5
4
3
2
1
0
5.0
4.0
3.0
2.0
1.0
0
0.4
0.3
0.2
0.1
0
V
= V1 = V2
V1 = V2
V3 = V4 = V
ADJ1
ADJ2
=
CC
V3 = V4 = V
= V
ADJ2
= GND
V3 = 2.5V (A1)/V3 = 1.8V (B1)
V4 = 1.8V (A1)/V4 = 1.5V (B1)
V
= GND
ADJ1
V
= V
= 0.55V
ADJ1
ADJ2
RST AT
150mV
V2 = GND
RST AT
50mV
V2 = V1
V
V
RT50
RT33
V
V
RT50
RT33
LTC2908-B1 LTC2908-A1
LTC2908-B1 LTC2908-A1
0
1
2
3
4
5
0.4
V1 (V)
0
1
2
3
4
5
0
0.2
0.6
0.8
SUPPLY VOLTAGE, V (V)
V1 (V)
CC
2908 G13
2908 G15
2908 G14
RST Pull-Down Current (IRST) vs
Supply Voltage (VCC) with Dual
Channel Supply
RST Pull-Down Current (IRST) vs
Supply Voltage (VCC) with Single
Channel Supply
RST Output Voltage Low (VOL
)
vs RST Pull-Down Current (IRST
LTC2908-A1
)
0.8
10
1
10
1
V1 = 5.0V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
V
= V1 = V2
V
= V1
CC
V3 = V4 = V
CC
V2 = V3 = V4 = V
ADJ1
= V
= GND
= V = GND
ADJ2
ADJ1
ADJ2
0.7
0.6
V
= V
= 0.4V
ADJ2
RST AT 150mV
ADJ1
0.5
0.4
0.3
0.2
0.1
85°C
–40°C
25°C
RST AT 150mV
0.1
0.01
0.1
0.01
RST AT 50mV
RST AT 50mV
0
0.001
0.001
5
10
20
25
30
(mA)
35
0
15
0
0.2
0.4
0.6
0.8
1
0
0.2
0.4
0.6
0.8
1
RST PULL-DOWN CURRENT, I
SUPPLY VOLTAGE, V (V)
SUPPLY VOLTAGE, V (V)
RST
CC
CC
2908 G16
2908 G17
2908 G18
RST Output Voltage Low (VOL
)
vs RST Pull-Down Current (IRST
)
RST Pull-Up Current (IRST
vs Supply Voltage (VCC
)
LTC2908-B1
)
0.8
–30
V1 = 3.3V
V2 = 2.5V
V3 = 1.8V
V4 = 1.5V
V
= V1 = V2
CC
V3 = 2.5V (A1)/V3 = 1.8V (B1)
–25 V4 = 1.8V (A1)/V4 = 1.5V (B1)
= V = 0.55V
0.7
0.6
V
ADJ1
ADJ2
V
= V
= 0.4V
ADJ2
RST HELD AT 0V
ADJ1
–20
–15
–10
–5
0.5
0.4
0.3
0.2
0.1
85°C
–40°C
25°C
V
V
RT50
RT33
LTC2908-B1
LTC2908-A1
0
0
5
10
20
(mA)
25
0
15
2
3
3.5
4
4.5
5
2.5
SUPPLY VOLTAGE, V (V)
RST PULL-DOWN CURRENT, I
CC
RST
2908 G19
2908 G20
sn2908 2908fs
5
Linear Systems [ Linear Systems ]
