LT3509 LINER [Linear Technology], LT3509 Datasheet - Page 5

• Manufacturer Part Number: LT3509
• Description: Dual 36V, 700mA Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
1.025
1.015
1.005
0.995
0.985
0.975
1.02
1.01
0.99
0.98
1
−50
F
R
SW
T
= 40.2k
−25
vs Temperature
1.5
0.5
45
25
20
15
10
40
35
30
0
5
0
2
1
0
TEMPERATURE(ºC)
–40
Max V
V
0
I
LIM
OUT
25
vs Temperature
= 5V, f
IN
50
0.2
0
for Constant Frequency
SWITCH
TEMPERATURE (ºC)
SW
DA
75
I
LOAD
= 2MHz
0.4
40
100
3509 G08
(A)
125
80
T
0.6
T
A
A
= 25ºC
= 85ºC
0.805
0.795
0.81
0.79
3509 G11
3509 G13
0.8
120
−50
0.8
FB Pin Voltage vs. Temperature
−25
0
TEMPERATURE(ºC)
25
50
75
140
120
100
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
80
60
40
20
0
1
0
−50
0
100
Min ON Time vs. Temperature
I
I
LOAD
LIM
3509 G09
10
−25
vs Duty Cycle
125
= 0.3A
20 30 40 50 60 70 80 90
0
TEMPERATURE(ºC)
DUTY CYCLE (%)
25
30
25
20
15
10
5
0
0
Max V
V
50
OUT
= 3.3V, f
IN
75
0.2
T
for Constant Frequency
A
= 25ºC
100
3509 G12
3509 G14
SW
I
LOAD
125
100
0.4
= 2MHz
(A)
LT3509
0.6
T
T
A
A
= 25ºC
= 85ºC
3509 G10
5
3509f
0.8