LTC3605 LINER [Linear Technology], LTC3605 Datasheet - Page 5

• Manufacturer Part Number: LTC3605
• Description: 20V, 5A Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
1.30
1.25
1.10
1.00
1.20
1.15
1.05
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
3.0
2.0
1.5
1.0
2.5
0.5
0
0
–40
0
0
Frequency vs V
RUN Pin Threshold vs Temperature
Switching Frequency vs R
V
R
IN
T
50 100 150 200 250
= 162k
2
= 20V
–15
4
10
TEMPERATURE (°C)
6
R
V
8
35
T
ON
ON
(k )
(V)
10
Voltage
300 350 400 450
60
12
85
14
T
3605A G09
16
3605A G12
3605A G15
110
500
18
CLKOUT
2V/DIV
5V/DIV
2A/DIV
V
350
300
250
200
150
100
120
100
SW
50
80
60
40
20
I
0
0
L
0
V
V
MODE = 0V
I
L1 = 0.5µH
Switch Leakage vs V
0
DCM Operation
Current Limit Foldback
OUT
IN
OUT
= 20V
2
0.1
= 0A
= 2.5V
4
0.2
6
400ns/DIV
8
0.3
V
V
IN
FB
10
(V)
(V)
0.4
12
IN
0.5
14
16
0.6
T
3605A G10
3605A G13
3605A G16
A
18 20
= 25°C unless otherwise specified.
0.7
CLKOUT
2V/DIV
5V/DIV
2A/DIV
V
101
100
SW
88
99
98
97
96
95
94
93
92
91
90
96
94
92
90
86
84
82
80
I
L
0
V
V
MODE = 3.3V
I
L1 = 0.5µH
0
Efficiency vs V
INTV
CCM Operation
OUT
IN
OUT
= 20V
= 0A
= 2.5V
20
CC
INTV
5
Load Regulation
CC
40
OUTPUT CURRENT (mA)
LTC3605A
10
400ns/DIV
60
IN
V
I
I
IN
LOAD
LOAD
(V)
80
15
= 1A
= 5A
100
V
OUT
T
20
A
120
= 25°C
= 3.3V
3605A G14
3605A G17
3505A G11
3605af
5
140
25