LTC1735 Linear Technology, LTC1735 Datasheet - Page 4

• Manufacturer Part Number: LTC1735
• Description: High Efficiency Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

LTC1735
TYPICAL PERFOR A CE CHARACTERISTICS
4
300
100
500
400
200
100
100
95
90
85
80
75
70
90
80
70
60
50
40
30
20
0.001
0
0
0
Efficiency vs Load Current
(3 Operating Modes)
Efficiency vs Input Voltage
Input and Shutdown Currents
vs Input Voltage
EXTV
V
FIGURE 1
EXTV
OUT
BURST
CC
5
CC
= 1.6V
5
I
OPEN
OPEN
OUT
0.01
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
LOAD CURRENT (A)
= 0.5A
10
SYNC
EXTV
EXTV
SHUTDOWN
15
CC
0.1
15
CC
OPEN
20
= 5V
CONT
I
OUT
20
= 5A
25
V
V
R
f
O
IN
OUT
1
W
S
= 300kHz
= 0.01
= 10V
25
30
= 3.3V
1735 G01
1735 G04
1735 G07
U
35
10
30
60
100
80
40
20
0
–0.3
–0.4
–0.1
–0.2
100
90
80
70
60
50
40
0
0.01
0
Efficiency vs Load Current
Load Regulation
6
5
2
0
4
3
1
EXTV
FIGURE 1
0
INTV
V
1mA LOAD
IN
CC
= 5V
2
5
= 5V
CC
V
IN
LOAD CURRENT (A)
LOAD CURRENT (A)
Line Regulation
0.1
= 24V
10
INPUT VOLTAGE (V)
V
4
IN
= 15V
15
6
20
1
25
FCB = 0V
V
FIGURE 1
8
IN
= 15V
1735 G05
1735 G02
30
1735 G08
10
10
35
500
400
300
200
100
100
500
400
200
100
300
95
90
85
80
75
70
0
0
0
0
Efficiency vs Input Voltage
V
vs Load Current
EXTV
vs INTV
0
R
V
EXTV
V
FIGURE 1
IN
OUT
SENSE
OUT
– V
CC
= 5V – 5% DROP
= 1.6V
CC
5
10
2
= 0.005
INTV
= 5V
OUT
CC
Switch Drop
INPUT VOLTAGE (V)
LOAD CURRENT (A)
CC
10
Load Current
Dropout Voltage
LOAD CURRENT (mA)
20
4
I
OUT
15
= 0.5A
I
OUT
6
30
20
= 5A
40
8
25
1735 G03
1735 G06
1735 G09
10
30
50