5
LT1575/LT1577
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Error Amplifier Large-Signal
Voltage Gain vs Temperature
Gain and Phase vs Frequency
TEMPERATURE (°C)
0
LINE REGULATION (%/V)
0.010
0.020
0.030
0.005
0.015
0.025
–25 25 75 125
1575/77 G10
175–50–75 0 50 100 150
V
REF
/V
OUT
Line Regulation
vs Temperature
TEMPERATURE (°C)
–75
LARGE-SIGNAL VOLTAGE GAIN (dB)
105
115
125
1575/77 G11
95
85
100
110
120
90
80
75
70
–25
25
75
–50 150
0
50
100
175
Gate Output Swing High
vs Temperature
IPOS + INEG Supply Current
vs Temperature
TEMPERATURE (°C)
–75
GATE OUTPUT SWING LOW (V)
2.50
3.00
125
1575/77 G13
2.00
1.50
2.25
2.75
1.75
1.25
1.00
–25
25
75
–50 150
0
50
100
175
I
LOAD
= 50mA
NO LOAD
Gate Output Swing Low
vs Temperature
TEMPERATURE (°C)
0
GATE OUTPUT SWING HIGH (V)
1.0
2.0
3.0
0.5
1.5
2.5
–25 25 75 125
1575/77 G14
175–50–75 0 50 100 150
NO LOAD
I
LOAD
= 50mA
TEMPERATURE (°C)
–75
300
I
POS
+ I
NEG
SUPPLY CURRENT (µA)
400
600
700
800
1000
–50
50
100
1575/77 G15
500
900
25
150
175
–25
0
75 125
IPOS = INEG = 3V
IPOS = INEG = 5V
IPOS = INEG = 12V
IPOS = INEG = 20V
FREQUENCY (Hz)
50
100
ERROR AMPLIFIER GAIN AND PHASE
150
200
1k 100k 1M 100M
1575/77 G12
0
10k
10M
PHASE
GAIN
Current Limit Threshold Voltage
vs Temperature
TEMPERATURE (°C)
35
CURRENT LIMIT THRESHOLD VOLTAGE (mV)
45
55
65
40
50
60
–25 25 75 125
1575/77 G16
175–50–75 0 50 100 150
IPOS = 5V
IPOS = 3V
IPOS = 20V
Current Limit Threshold Voltage
Line Regulation vs Temperature
TEMPERATURE (°C)
–75
CURRENT LIMIT THRESHOLD
VOLTAGE LINE REGULATION (%/V)
–0.2
–0.1
0
125
1575/77 G17
–0.3
–0.4
–0.5
–25
25
75
–50 150
0
50
100
175
