LTC1775 LINER [Linear Technology], LTC1775 Datasheet - Page 4

• Manufacturer Part Number: LTC1775
• Description: High Power No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

LTC1775
TYPICAL PERFOR A CE CHARACTERISTICS
4
1200
1000
100
800
600
400
200
– 0.1
– 0.2
– 0.3
– 0.4
– 0.5
90
80
70
60
50
0.001
0
0
0
Efficiency vs Load Current
Input and Shutdown Current
vs Input Voltage
0
Load Regulation
5
0.01
BURST
MODE
2
10
LOAD CURRENT (A)
INPUT VOLTAGE (V)
LOAD CURRENT (A)
EXTV
15
4
CC
0.1
OPEN
SHUTDOWN
20
CONTINUOUS
MODE
FIGURE 1 CIRCUIT
6
V
V
EXTV
IN
OUT
EXTV
25
1.0
= 10V
W
CC
= 5V
CC
8
= V
30
1775 • G01
= 5V
1775 • G07
OUT
1775 • G04
U
10
35
10
60
50
40
30
20
10
0
– 0.5
–1.0
100
3.0
2.5
2.0
1.5
1.0
0.5
1.0
0.5
95
90
85
80
75
70
0
0
0
I
Efficiency vs Input Voltage
0
INTV
0
TH
CONTINUOUS
MODE
V
IN
Pin Voltage vs Load Current
BURST
MODE
2
= 15V
CC
5
10
INTV
Load Regulation
4
INPUT VOLTAGE (V)
LOAD CURRENT (A)
CC
10
LOAD CURRENT (mA)
20
6
I
LOAD
15
8
= 500mA
FIGURE 1 CIRCUIT
V
V
FIGURE 1 CIRCUIT
30
IN
OUT
20
= 20V
10
= 5V
I
LOAD
V
40
OUT
25
12
= 5A
1775 • G05
1775 • G08
1775 • G02
= 5V
14
30
50
400
300
200
100
100
500
400
300
200
100
95
90
85
80
75
70
0
0
Efficiency vs Input Voltage
0
0
0
EXTV
vs INTV
V
vs Load Current
FIGURE 1 CIRCUIT
V
V
EXTV
IN
OUT
IN
– V
= 15V
CC
CC
5
= 5V, 5% DROP
10
2
INTV
OUT
= 5V
CC
Switch Drop
I
LOAD
INPUT VOLTAGE (V)
CURRENT LOAD (A)
CC
Load Current
10
Dropout Voltage
LOAD CURRENT (mA)
20
= 500mA
4
15
FIGURE 1 CIRCUIT
30
6
20
I
V
LOAD
OUT
40
8
25
= 3.3V
= 5A
1775 • G06
1775 • G03
1775 • G09
30
10
50