LTC3780EG Linear Technology, LTC3780EG Datasheet - Page 7

• Manufacturer Part Number: LTC3780EG
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,CMOS,SSOP,24PIN,PLASTIC
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
450
400
350
300
250
200
100
150
140
120
100
180
160
50
0
–50
0
Oscillator Frequency
vs Temperature
Maximum Current Sense
Threshold vs Duty Factor (Boost)
–25
20
0
TEMPERATURE (°C)
DUTY FACTOR (%)
V
V
V
–100
PLLFLTR
PLLFLTR
PLLFLTR
40
200
150
–50
100
25
50
0
Peak Current Threshold
vs V
0
= 2.4V
= 1.2V
50
= 0V
60
ITH
0.4
75
(Boost)
W
80
0.8
100
3780 G19
3780 G22
V
ITH
U
1.2
125
100
(V)
1.6
140
130
120
110
3.6
3.0
4.0
3.8
3.4
3.2
1.8
–50 –25
0
Undervoltage Reset
vs Temperature
3780 G25
Maximum Current Sense
Threshold vs Duty Factor (Buck)
2.4
20
0
TEMPERATURE (°C)
DUTY FACTOR (%)
40
25
50
60
–100
–150
100
–50
75
50
0
0
Valley Current Threshold
vs V
80
100
T
3780 G20
3780 G23
ITH
A
0.4
= 25°C unless otherwise noted.
125
100
(Buck)
0.8
V
ITH
–150
–100
1.2
–20
–40
–60
–80
200
150
100
–50
50
(V)
0
100
–50
Minimum Current Sense
Threshold vs Duty Factor (Buck)
Minimum Current Sense
Threshold vs Temperature
1.6
–25
80
2.0
0
TEMPERATURE (°C)
3780 G26
DUTY FACTOR (%)
60
2.4
25
BOOST
BUCK
LTC3780
50
40
75
20
100
3780 G24
3780 G21
7
3780f
125
0