Datasheet

4
LTC1775
LOAD CURRENT (A)
0.001
EFFICIENCY (%)
10
1775 • G01
0.01
0.1
1.0
100
90
80
70
60
50
CONTINUOUS
MODE
BURST
MODE
V
IN
= 10V
V
OUT
= 5V
EXTV
CC
= V
OUT
INPUT VOLTAGE (V)
0
EFFICIENCY (%)
100
95
90
85
80
75
70
5
10 15 20
1775 • G02
25 30
I
LOAD
= 5A
I
LOAD
= 500mA
V
OUT
= 5V
FIGURE 1 CIRCUIT
INPUT VOLTAGE (V)
0
5
10 15 20 25 30
100
95
90
85
80
75
70
1775 • G03
EFFICIENCY (%)
I
LOAD
= 5A
I
LOAD
= 500mA
V
OUT
= 3.3V
FIGURE 1 CIRCUIT
LOAD CURRENT (A)
0
∆V
OUT
(%)
0
–0.1
–0.2
–0.3
–0.4
–0.5
8
1775 • G04
2
4
6
10
FIGURE 1 CIRCUIT
CURRENT LOAD (A)
0
V
IN
– V
OUT
(mV)
10
1775 • G06
2
4
68
400
300
200
100
0
FIGURE 1 CIRCUIT
V
OUT
= 5V, 5% DROP
LOAD CURRENT (A)
0
V
ITH
(V)
3.0
2.5
2.0
1.5
1.0
0.5
0
610
1775 • G05
24
81214
FIGURE 1 CIRCUIT
V
IN
= 20V
V
OUT
= 5V
CONTINUOUS
MODE
BURST
MODE
INTV
CC
LOAD CURRENT (mA)
0
EXTV
CC
– INTV
CC
(mV)
500
400
300
200
100
0
40
1775 • G09
10
20
30
50
V
IN
= 15V
EXTV
CC
= 5V
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
SHUTDOWN CURRENT (µA)
1200
1000
800
600
400
200
0
15 25
1775 • G07
510
20 30 35
60
50
40
30
20
10
0
EXTV
CC
= 5V
SHUTDOWN
EXTV
CC
OPEN
Efficiency vs Load Current Efficiency vs Input Voltage
Efficiency vs Input Voltage
Load Regulation
V
IN
– V
OUT
Dropout Voltage
vs Load Current
I
TH
Pin Voltage vs Load Current
Input and Shutdown Current
vs Input Voltage INTV
CC
Load Regulation
EXTV
CC
Switch Drop
vs INTV
CC
Load Current
INTV
CC
LOAD CURRENT (mA)
0
∆INTV
CC
(%)
50
1775 • G08
10
20
30 40
1.0
0.5
0
–0.5
–1.0
V
IN
= 15V
TYPICAL PERFOR A CE CHARACTERISTICS
UW