Datasheet

LTC2909
5
2909fb
Shunt Regulation Voltage
vs Temperature
⎯
R
⎯
S
⎯
T Output Voltage vs V
CC
⎯
R
⎯
S
⎯
T Pull-Down Current vs V
CC
⎯
R
⎯
S
⎯
T V
OL
vs I
⎯
R
⎯
S
⎯
T
I
SEL
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25°C unless otherwise noted
TEMPERATURE (°C)
–50
6.0
SHUNT REGULATION VOLTAGE, V
CC(SHUNT)
(V)
6.4
7.0
0
50
75
2909 G10
6.2
6.8
6.6
–25
25
100
125
I
CC
= 10mA
I
CC
= 1mA
I
CC
= 100μA
⎯
R
⎯
S
⎯
T Output Voltage vs V
CC
Shunt Regulation Voltage
vs Supply Current
SUPPLY CURRENT, I
CC
(mA)
SHUNT REGULATION VOLTAGE, V
CC(SHUNT)
(V)
7.0
6.2
6.8
6.6
6.4
0.01 1 10 100
2909 G11
6.0
0.1
T
A
= 25°C
SUPPLY VOLTAGE, V
CC
(V)
0
RST VOLTAGE (V)
3
4
5
4
2909 G12
2
1
0
1
2
3
5
LTC2909-2.5 LTC2909-5
LTC2909-3.3
ADJ1 = 0.55
ADJ2 = 0.45
SEL = OPEN
10k PULL-UP R TO V
CC
SUPPLY VOLTAGE, V
CC
(V)
0
0
RST VOLTAGE (V)
0.1
0.2
0.3
0.4
0.1 0.2 0.3 0.4
2909 G13
0.5 0.6 0.7 0.8
RST WITH 10k PULL-UP
RST WITH 100k PULL-UP
V
CC
SUPPLY VOLTAGE, V
CC
(V)
0
0
PULL-DOWN CURRENT, I
RST
(mA)
1
2
3
4
5
6
1234
2909 G14
5
ADJ1 = 0.55
ADJ2 = 0.55
SEL = OPEN
RST AT 150mV
RST AT 50mV
⎯
R
⎯
S
⎯
T Pull-Down Current vs V
CC
SUPPLY VOLTAGE, V
CC
(V)
0.01
PULL-DOWN CURRENT, I
RST
(mA)
0.1
1
0 0.4 0.6 0.8
0.001
0.0001
0.2
1
2909 G15
RST AT 150mV
RST AT 50mV
I
SEL
vs Temperature
I
RST
(mA)
0
0
RST V
OL
(V)
0.2
0.4
0.6
0.8
1.0
5
10 15 20
1635 G07
25 30
V
CC
= 3V
NO PULL-UP R
T
A
= 125°C
T
A
= –40°C
T
A
= 25°C
TEMPERATURE (°C)
–50 –25
–10
I
SEL
(μA)
–14
–20
0
50
75
2909 G17
–12
–18
–16
25
100
125
SEL = GND
TEMPERATURE (°C)
–50 –25
10
I
SEL
(μA)
14
20
0
50
75
2909 G18
12
18
16
25
100
125
SEL = V
CC