Datasheet

5
LTC1266
LTC1266-3.3/LTC1266-5
INPUT VOLTAGE (V)
0
EFFICIENCY (%)
85
90
95
100
16
1266 G04
80
75
70
4
8
12
20
FIGURE 11 CIRCUIT
I
LOAD
= 2.5A
I
LOAD
= 100mA
I
LOAD
= 1A
LOAD CURRENT (A)
0
–40
∆V
OUT
(mV)
–30
–20
–10
30
10
0.5
1.0
20
0
1.5
2.0 2.5
3.0
1266 G06
FIGURE 11 CIRCUIT
V
IN
= 12V (Burst Mode
OPERATION ENABLED)
V
IN
= 5V
V
IN
= 5V (Burst Mode
OPERATION INHIBITED)
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (mA)
1.5
2.0
2.5
3.0
16
1266 G07
1.0
0.5
0
4
8
12
20
ACTIVE MODE
SLEEP MODE
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (µA)
15
20
25
16
1266 G08
10
5
0
4
8
12
20
ACTIVE MODE
SLEEP MODE
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (µA)
30
40
50
1266 G09
20
10
0
5
10
15
20
PWR V
IN
V
IN
INPUT VOLTAGE (V)
0
∆V
OUT
(mV)
0
10
20
16
1266 G05
–10
–20
4
812
–30
40
30
–40
FIGURE 11 CIRCUIT
I
LOAD
= 1A
Efficiency vs Input Voltage
V
IN
DC Supply Current
Line Regulation
Power V
IN
DC Supply Current
Load Regulation
Supply Current in Shutdown
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Efficiency vs Input Voltage
LOAD CURRENT (A)
0
–50
∆V
OUT
(mV)
–40
–30
–20
20
0
1
2
10
–10
3
4
5
1266 G03
V
IN
= 5V
FIGURE 1 CIRCUIT
V
IN
= 9V (Burst Mode
OPERATION ENABLED)
V
IN
= 5V (Burst Mode
OPERATION INHIBITED)
Line Regulation Load Regulation
INPUT VOLTAGE (V)
3
70
EFFICIENCY (%)
75
80
85
90
100
4
567
1266 G01
89
95
I
LOAD
= 2.5A
FIGURE 1 CIRCUIT
I
LOAD
= 5A
I
LOAD
= 100mA
INPUT VOLTAGE (V)
3
∆V
OUT
(mV)
0
10
20
9
1266 G02
–10
–20
–40
45678
–30
40
30
FIGURE 1 CIRCUIT
I
LOAD
= 1A