lt3694-1 Linear Technology Corporation, lt3694-1 Datasheet - Page 5

• Manufacturer Part Number: lt3694-1
• Description: Lt3694/lt3694-1 - 36v, 2.6a Monolithic Buck Regulator With Dual Ldo
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
100
760
758
756
754
752
750
740
748
746
744
742
5.0
4.5
4.0
3.0
70
60
50
3.5
90
80
–50
–50
0
Efficiency at V
Switch Current Limit
vs Temperature
V
FB
V
IN
V
vs Temperature
= 36V
IN
= 6.3V
V
0
0
IN
TEMPERATURE (°C)
1
TEMPERATURE (°C)
= 12V
I
OUT
OUT
50
50
(A)
= 5V
2
f
SW
100
100
= 800kHz
36941 G01
36941 G07
36941 G04
3
150
150
0.8
0.7
0.6
0.5
0.4
0.2
0.1
3.0
0.3
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
0
0
Switch V
0
Frequency vs R
Switch Current Limit
vs Duty Cycle
–45°C
150°C
20
50
SWITCH DUTY CYCLE (%)
CESAT
SWITCH CURRENT (A)
25°C
1
40
vs Switch Current
T
R
100
T
(k)
60
2
150
80
V
IN
36941 G02
36941 G05
36941 G08
200
= 12V, T
100
3
A
160
140
120
100
–1
–2
–5
= 25°C, unless otherwise noted.
70
60
50
40
30
20
10
80
60
–3
–4
40
20
LT3694/LT3694-1
5
4
3
2
1
0
0
0
–50
–50
Switch Minimum On-Time and
Off-Time vs Temperature
BST Pin Current
vs Switch Current
0
Frequency Shift vs Temperature
I
SW
= 1A
0
0
SWITCH CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
1
50
50
MINIMUM
ON-TIME
MINIMUM
OFF-TIME
2
100
100
R
R
T
T
= 200k
= 10.7k
40.2k
36941 G03
R
36941fa
T
36941 G09
36941 G06
5
=
150
150
3