LT3782 Linear Technology, LT3782 Datasheet - Page 4

• Manufacturer Part Number: LT3782
• Description: 2-Phase Step-Up DC/DC Controller
• Manufacturer: Linear Technology

LT3782
TYPICAL PERFOR A CE CHARACTERISTICS
4
1000
10.9
10.8
10.7
10.6
10.5
10.4
10.3
10.2
10.1
10.0
11.0
600
500
400
300
200
100
900
800
700
600
500
400
300
200
100
0
0
0
0
V
Switching Frequency vs R
SGATE (Low) to BGATE (High)
Delay vs V
GBIAS
20
0.5
40
vs I
60
DELAY
GBIAS
1.0
80
R
I
V
GBIAS
FREQ
DELAY
100
50
(R
(kΩ)
(mA)
SET
(V)
120
1.5
= 80k)
140
W
FREQ
160
2.0
180
3782 G04
3782 G07
3782 G01
U
200
2.5
100
2.446
2.444
2.442
2.440
2.438
2.436
2.434
20
18
16
14
12
10
8
6
4
2
0
105
100
6
95
90
85
80
I
0
Reference Voltage vs
Temperature
CC
100
8
Switching Frequency vs Duty
Cycle
vs V
10
25
JUNCTION TEMPERATURE (°C)
CC
12
200
SWITCHING FREQUENCY (kHz)
14
50
16
V
300
CC
18
75
(V)
20
400
22
100
24
26
125
500
3782 G02
28
3782 G05
T
3782 G08
30
150
A
600
= 25°C unless otherwise noted.
14
12
10
–2
8
6
4
2
0
–1
–2
–3
–4
–5
3
2
1
0
0
V
(Charging 2µF)
6
∆V
(R
GBIAS
120
110
100
SET
REF
90
80
70
60
50
40
9
0
Maximum Duty Cycle Limit vs
V
250µ
= 80k)
vs I
vs V
DCL
12
0.3
GBIAS
(R
CC
∆V
15
, ∆Frequency vs V
SET
0.6
TIME (s)
REF
500µ
V
∆Frequency
at Start-Up
CC
18
= 80k)
0.9
(V)
V
I
V
GBIAS
GBIAS
21
DCL
1.2
750µ
(V)
24
1.5
27
3782 G06
3782 G03
1.8
CC
1m
30
800
700
600
500
400
300
200
100
0
2.1
12
10
8
4
2
0
–2
–4
6
3782 G09
3782fa
2.4