LTC3605 LINER [Linear Technology], LTC3605 Datasheet - Page 4

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

LTC3605A
TYPICAL PERFORMANCE CHARACTERISTICS
4
AC-COUPLED
100mV/DIV
100
90
80
70
60
50
40
30
20
10
25
20
15
10
5A/DIV
5A/DIV
0
0
5
0.01
I
V
LOAD
0
Efficiency vs Load Current
I
OUT
V
f
INTVCC
MODE = 3.3V
NO LOAD
SW
I
IN
L
0.5
V
V
I
Load Step
(External ITH Compensation)
= 12V
LOAD
= 1MHz
IN
OUT
= 12V
1
Current vs Frequency
= 1.2V
= 0.4A
LOAD CURRENT (A)
0.1
1.5
FREQUENCY (MHz)
2
20µs/DIV
2.5
3
1
V
V
V
3.5
OUT
OUT
OUT
= 3.3V
= 2.5V
= 1.8V
3605A G18
3605A G03
4
4.5
10
3605A G06
AC-COUPLED
120
100
2.0
1.5
1.0
0.5
80
60
20
100mV/DIV
40
0
0
–45
0
Quiescent Current vs V
R
5A/DIV
5A/DIV
I
DS(ON)
V
LOAD
OUT
–20
I
L
Load Step
(Internal ITH Compensation)
V
V
I
ITH = 3.3V
4
LOAD
IN
OUT
vs Temperature
5
= 12V
INPUT VOLTAGE (V)
TEMPERATURE (°C)
TOP FET
= 1.2V
= 0.4A
BOTTOM FET
30
8
55
12
20µs/DIV
80
IN
105 130
16
T
3605A G01
3605A G04
A
= 25°C unless otherwise specified.
20
3605A G07
–0.5
–1.5
–1.0
1.5
1.0
0.5
20
15
10
5
0
0
0
0
Output Tracking
Load Regulation
V
V
Shutdown Current vs V
IN
OUT
COMPENSATION
EXTERNAL ITH
= 12V
1
= 1.2V
COMPENSATION
4
INTERNAL ITH
(ITH = 3.3V)
2
INPUT VOLTAGE (V)
500µs/DIV
8
3
I
OUT
(A)
4
12
V
V
f = 1MHz
MODE = INTV
IN
IN
OUT
5
= 12V
= 1.2V
V
16
TRACK
V
6
FB
3605A G05
3605A G02
3605A G08
3605af
CC
20
7