Datasheet

3
LT1301
5ms/DIV
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
5V Output Efficiency
Shutdown Pin Bias Current
LOAD CURRENT (mA)
1
78
EFFICIENCY (%)
80
82
84
86
10 100 1000
LT1301 G1
76
74
72
70
88
90
V
IN
= 3.3V
V
IN
= 2.5V
200µs/DIV
I
LOAD
120mA
0mA
V
OUT
100mV/DIV
AC COUPLED
LT1301 G6
V
OUT
100mV/DIV
AC COUPLED
120mA
0mA
I
LOAD
LT1301 G7
200µs/DIV
V
OUT
2V/DIV
5V
V
SELECT
10V/DIV
C
OUT
= 100µF, V
IN
= 5V
100Ω LOAD
LT1301 G8
V
SELECT
10V/DIV
5ms/DIV
LT1301 G9
C
OUT
= 100µF, V
IN
= 3.3V
100Ω LOAD
Saturation Voltage vs Switch Current No-Load Input Current
V
IN
= 5V
Load Transient Response of
Figure 1 Circuit
Total Quiescent Current
in Shutdown
SHUTDOWN VOLTAGE (V)
0

SHUTDOWN CURRENT (µA)
0
4
6
8
20
12
14
2
4
5
LT1300 G3
2
16
18
10
13
6
7
8
T
A
= 25°C
INPUT VOLTAGE (V)
0
I
SHDN
+ I
VIN
+ I
SENSE
(µA)
40
50
60
8
LT1301 G2
30
20
0
2
4
6
10
80
70
1
3
5
7
T
A
= 25°C
SWITCH CURRENT (A)
0 0.1
SATURATION VOLTAGE (mV)
150
175
200
225
250
0.8 0.9
LT1301 G4
100
125
50
25
75
0
0.2 0.3
0.4 0.5
0.6 0.7
1
T
A
= 25°C
INPUT VOLTAGE (V)
2
INPUT CURRENT (µA)
250
300
350
5
7
LT1301 G5
200
150
100
34 6
400
450
500
V
OUT
= 12V
V
OUT
= 5V
Load Transient Response of
Figure 1 Circuit
V
IN
= 3.3V
12V
5V
12V
Select Pin Transient Response
Select Pin Transient Response
V
OUT
2V/DIV