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