Datasheet

LT1977
4
1977fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
FB Voltage Oscillator Frequency SHDN Threshold
SHDN Pin Current
Shutdown Supply Current Sleep Mode Supply Current
Bias Sleep Current
1.20
VOLTAGE (V)
1.21
1.23
1.24
1.25
1.30
1.27
1.22
1.28
1.29
1.26
TEMPERATURE (°C)
–50 0
50
75
1977 G01
–25
25
100
125
TEMPERATURE (°C)
–50
450
FREQUENCY (kHz)
460
480
490
500
550
520
0
50
75
1977 G02
470
530
540
510
–25
25
100
125
VOLTAGE (V)
1.35
1977 G03
1.20
1.10
1.05
1.00
1.40
1.30
1.25
0.15
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
SHDN VOLTAGE (V)
0
0
CURRENT (µA)
1.5
2.5
3.5
10
20
30 40
1977 G04
50
4.5
5.5
1.0
2.0
3.0
4.0
5.0
60
T
J
= 25°C
CURRENT (µA)
1977 G05
20
10
5
0
25
15
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
V
IN
= 60V
V
IN
= 42V V
IN
= 12V
CURRENT (µA)
1977 G06
160
80
40
0
200
120
140
60
20
180
100
V
BIAS
= 0V
V
BIAS
= 5V
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
CURRENT (µA)
1977 G07
160
80
40
0
200
120
140
60
20
180
100
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
PGFB Threshold
VOLTAGE (V)
1977 G08
1.16
1.08
1.04
1.00
1.20
1.12
1.14
1.06
1.02
1.18
1.10
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125
PG Sink Current
CURRENT (µA)
1977 G09
200
100
50
0
250
150
TEMPERATURE (°C)
–50 0
50
75
–25
25
100
125