Datasheet

LTC3766
7
3766fa
For more information www.linear.com/LTC3766
Typical perForMance characTerisTics
FGD Delay vs Resistance SGD Delay vs Temperature FGD Delay vs Temperature
Gate Driver On-Resistance
vs V
CC
Voltage Efficiency (Figure 39 Circuit) Load Step (Figure 39 Circuit)
Oscillator Frequency
vs Temperature FB Voltage vs Temperature SGD Delay vs Resistance
TEMPERATURE (°C)
–55
CHANGE IN FREQUENCY (%)
1.0
1.5
2.0
35 95
3766 G10
0.5
0
–25 5
65 125
155
–0.5
–1.0
FS = 18.7k
FS = 124k
FS = V
CC
TEMPERARTURE (°C)
–55
598.0
V
FB
(mV)
598.2
598.6
598.8
599.0
65
599.8
3766 G11
598.4
5
–25
95 125
35
155
599.2
599.4
599.6
R
SGD
(kΩ)
0
DELAY (ns)
150
200
250
40
3766 G12
100
50
0
10
20
30
50
SG RISING
FG FALLING
MODE = 100k TO GND
SW TIED TO PT
+
R
FGD
(kΩ)
0
700
600
500
400
300
200
100
0
60 100
3766 G13
20 40
80
120
DELAY (ns)
TEMPERATURE (°C)
–55 –25
0
DELAY (ns)
100
250
5
65
95
3766 G14
50
200
150
35
125
155
R
SGD
= 49.9k
R
SGD
= 15k
TEMPERATURE (°C)
–55
DELAY (ns)
400
500
600
35 95
3766 G15
300
200
–25 5
65 125
155
100
0
R
FGD
= 100k
R
FGD
= 10k
V
CC
VOLTAGE (V)
5
1.50
1.75
2.25
8 10
3766 G16
1.25
1.00
6 7
9 11 12
0.75
0.50
2.00
RESISTANCE (Ω)
PT
+
, PT
–
PULL-DOWN
FG,SG
PULL-DOWN
ALL GATES
PULL-UP
LOAD CURRENT (A)
3
86
EFFICIENCY (%)
88
90
92
94
96
5
7 9 11
3766 G17
13 15
V
IN
= 36V
V
IN
= 48V
V
IN
= 72V
V
OUT
200mV/DIV
I
OUT
5A/DIV
20µs/DIV
3766 G18
V
IN
= 48V
V
OUT
= 5V
LOAD STEP = 5A TO 15A