Datasheet

3
LTC1503-1.8/LTC1503-2
LTC1503-X Input Operating
Current vs Input Voltage
INPUT VOLTAGE (V)
2
INPUT CURRENT (µA)
30
T
A
= 25°C
40
6
1503 G01
20
10
3
4
5
50
I
OUT
= 0mA
T
A
= –40°C
T
A
= 85°C
LTC1503-1.8
Output Voltage vs Input Voltage
LTC1503-2
Output Voltage vs Input Voltage
LTC1503-1.8
Efficiency vs Input Voltage
INPUT VOLTAGE (V)
2
OUTPUT VOLTAGE (V)
2.00
2.05
6
1503 G03
1.95
1.90
3
4
5
2.10
I
OUT
= 50mA
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
INPUT VOLTAGE (V)
2
EFFICIENCY (%)
60
80
6
1503-1.8/2 G05
40
20
3
4
5
100
“IDEAL”
LDO
T
A
= 25°C
I
OUT
= 100mA
I
OUT
= 1mA
LTC1503-1.8
Efficiency vs Output Current
LTC1503-X Input Shutdown
Current vs Input Voltage
INPUT VOLTAGE (V)
2
INPUT SHUTDOWN CURRENT (µA)
5
7.5
6
1503-1.8/2 TA02
2.5
0
3
4
5
10
V
OUT
= 0V
V
SHDN
/SS = 0V
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
INPUT VOLTAGE (V)
2
OUTPUT VOLTAGE (V)
1.80
1.85
6
1503-1.8/2 G03
1.75
1.70
3
4
5
1.90
I
OUT
= 50mA
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
60
80
100
100
1503-1.8/2 G06
40
20
0
0.1
1
10
1000
V
IN
= 5V
V
IN
= 4.4V
V
IN
= 3.6V
V
IN
= 3V
V
IN
= 2.4V
T
A
= 25°C
LTC1503-2
Efficiency vs Output Current
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
60
80
100
100
1503-1.8/2 G07
40
20
0
0.1
1
10
1000
V
IN
= 5V
V
IN
= 4.4V
V
IN
= 3.6V
V
IN
= 3V
V
IN
= 2.4V
T
A
= 25°C
LTC1503-1.8
Output Voltage vs Output Current
OUTPUT CURRENT (mA)
0.01
OUTPUT VOLTAGE (V)
1.80
1.82
1.84
100
1503-1.8/2 G08
1.78
1.76
1.74
0.1
1
10
1000
V
IN
= 3.3V
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
LTC1503-2
Output Voltage vs Output Current
OUTPUT CURRENT (mA)
0.01
OUTPUT VOLTAGE (V)
2.00
2.02
2.04
100
1503-1.8/2 G09
1.98
1.96
1.94
0.1
1
10
1000
V
IN
= 3.3V
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
TYPICAL PERFOR A CE CHARACTERISTICS
UW