lt3680 Linear Technology Corporation, lt3680 Datasheet - Page 5

• Manufacturer Part Number: lt3680
• Description: 36v, 3.5a, 2.4mhz Step-down Switching Regulator With 75?a Quiescent Current
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
700
600
400
300
200
500
100
7
6
5
4
3
2
1
0
0
–50
Switching Frequency
0
Switch Voltage Drop
0
Soft-Start
–25
0.5
1
RUN/SS PIN VOLTAGE (V)
0
SWITCH CURRENT (A)
1
TEMPERATURE (°C)
25
2
1.5
50
2
3
75
2.5
W
100
4
125
3
3680 G10
3680 G13
3680 G16
U
150
3.5
5
1200
1000
120
105
800
600
400
200
90
75
60
45
30
15
12
10
0
0
0
8
6
4
2
0
0
Frequency Foldback
Boost Pin Current
RUN/SS Pin Current
0
100
5
200
1
RUN/SS PIN VOLTAGE (V)
SWITCH CURRENT (A)
FB PIN VOLTAGE (mV)
10
300
2
400
15
500
20
3
600
25
700
4
30
800
3680 G11
3680 G14
T
3680 G17
A
900
= 25°C unless otherwise noted.
35
5
140
120
840
820
800
780
760
100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
80
60
40
20
0
0
–50
–50
Feedback Voltage
Minimum Switch On-Time
0
Boost Diode
–25
–25
BOOST DIODE CURRENT (A)
0.5
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
50
50
1.0
LT3680
75
75
100
100
1.5
125
125
3680 G12
3680 G15
3680 G18
5
3680f
150
150
2.0