Datasheet

5
LT1681
1681f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
I
BST
Boost Supply Current
vs Temperature
I
CC
Supply Current
vs SHDN Pin Voltage
TEMPERATURE (°C)
–55
I
BST
BOOST SUPPLY CURRENT (mA)
5.0
4.9
12580
1681 G04
4.8
–40
0
40
5.2
5.1
SHDN PIN CURRENT (V)
0
0
I
CC
SUPPLY CURRENT (µA)
20
40
60
0.2 0.4 0.6 0.8
1681 G05
1.0
1.2
T
A
= 25°C
UVLO I
CC
Supply Current
vs Temperature
5V
REF
Voltage vs Temperature
5V
REF
Short-Circuit Current Limit
vs Temperature
Error Amp Reference
vs Temperature
TEMPERATURE (°C)
–55
UVLO I
CC
SUPPLY CURRENT (mA)
0.8
12580
1681 G06
0.5
0.6
–40
0
40
1
TEMPERATURE (°C)
–55
5V
REF
VOLTAGE (V)
5.00
4.95
12580
1681 G07
4.90
–40
0
40
5.10
5.05
TEMPERATURE (°C)
–55
5V
REF
SHORT-CIRCUIT CURRENT LIMIT (mA)
40
12580
1681 G08
30
–40
0
40
60
50
TEMPERATURE (°C)
–55
ERROR AMP REFERENCE (V)
1.250
1.245
12580
1681 G09
1.240
–40
0
40
1.260
1.255
V
C
Pin Short-Circuit Current Limit
vs Temperature
Soft-Start Output Current
vs Temperature
Soft-Start Output Current
vs Soft-Start Pin Voltage
TEMPERATURE (°C)
–55
V
C
PIN SHORT-CIRCUIT CURRENT LIMIT (mA)
15
12580
1681 G10
10
–40
0
40
25
20
TEMPERATURE (°C)
–55
SOFT-START OUTPUT CURRENT (µA)
10
9
12580
1681 G11
8
–40
0
40
12
11
V
SS
= 2V
SOFT-START PIN VOLTAGE (mV)
0
SOFT-START OUTPUT CURRENT (µA)
20
40
60
1000 200 300 400
1681 G12
500
T
A
= 25°C