LT1105_15 Datasheet, PDF (8/32 Pages) Linear Technology – Offline Switching Regulator

LT1103/LT1105
TYPICAL PERFORMANCE CHARACTERISTICS
15V Gate Bias Short-Circuit
Current vs Temperature
130
110
90
Low Switch Drive Lockout
Threshold vs Temperature
10.5
10.2
9.9
70
9.6
50
9.3
30
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G22
9.0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G23
Feedback Threshold vs
Temperature
4.60
4.56
4.52
FB Input Bias Current vs
Temperature (V_C = 1V)
20
16
12
4.48
8
4.44
4
4.40
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G25
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G26
Error Amplifier Transconductance
vs Temperature
25000
20000
15000
10000
5000
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G28
Error Amplifier Transconductance
and Phase vs Frequency
0.020
200
0.018
PHASE
180
0.016
160
gm
0.014
140
0.012
120
0.010
100
0.008
80
0.006
60
0.004
0.002
0
0.1
gm ⁴⁰
20
PHASE
0
1
10
100
1000
FREQUENCY (kHz)
LT1103 G29
High Switch Drive Lockout
Threshold vs Temperature
20.0
19.5
19.0
18.5
18.0
17.5
17.0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G24
Change in FB Input Bias Current
with Change in V_C vs Temperature
(V_C = 1V to 4V)
14
13
12
11
10
9
8
7
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G27
Error Amplifier Voltage Gain vs
Temperature
2500
2000
1500
1000
500
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1103 G30
8