LTC1625
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Input Voltage,
VOUT = 3.3V
Efficiency vs Input Voltage,
Efficiency vs Load Current
VOUT = 5V
100
95
90
85
80
75
70
100
95
90
85
80
75
70
100
90
80
70
60
50
FIGURE 1 CIRCUIT
= 2A
FIGURE 1 CIRCUIT
BURST
MODE
I
LOAD
I
= 2A
OPERATION
LOAD
CONTINUOUS
MODE
I
= 200mA
LOAD
I
= 200mA
LOAD
V
V
= 10V
OUT
EXTV = V
CC
IN
= 5V
OUT
0
10
15
20
25
30
0
10
15
20
25
30
0.001
0.01
0.1
LOAD CURRENT (A)
1
5
5
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1625 G02
1625 G02
1625 G01
ITH Pin Voltage vs Load Current
Load Regulation
3.0
2.5
2.0
1.5
400
300
200
100
0
0
–0.05
–0.10
–0.15
–0.20
–0.25
FIGURE 1 CIRCUIT
FIGURE 1 CIRCUIT
= 5V – 5% DROP
FIGURE 1 CIRCUIT
V
V
= 20V
= 5V
V
IN
OUT
OUT
CONTINUOUS
MODE
1.0
0.5
0
Burst Mode
OPERATION
4
6
7
0
1
2
3
4
5
0
1
2
3
5
0
1
3
4
5
2
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
1625 G05
1625 G04
1625 G06
Input and Shutdown Current
vs Input Voltage
INTVCC Load Regulation
1000
800
600
400
200
0
50
40
30
20
10
0
0
500
400
300
200
100
0
EXTV OPEN
CC
–0.5
–1.0
–1.5
–2.0
–2.5
SHUTDOWN
EXTV = 5V
CC
0
5
10
15
20
25
30
35
0
10
30
40
50
20
0
10
20
30
40
50
INPUT VOLTAGE (V)
INTV LOAD CURRENT (mA)
INTV LOAD CURRENT (mA)
CC
CC
1625 G07
1625 G08
1625 G09
4
Linear [ Linear ]
