Datasheet

3
LTC1515 Series
LTC1515-X 3.3V Output Voltage
vs Input Voltage
INPUT VOLTAGE (V)
0
OPERATING CURRENT (µA)
120
100
80
60
40
20
8
1515 G06
2
4
6
10
85°C
–40°C
25°C
V
OUT
= 5V
I
OUT
= 0mA
LTC1515-X Operating Current
vs Input Voltage
TYPICAL PERFORMANCE CHARACTERISTICS
UW
LTC1515-X
5V Efficiency vs Output Current
OUTPUT CURRENT (mA)
EFFICIENCY (%)
0.01 1 10
1515 G02
0.1 100
100
80
60
40
20
0
V
OUT
= 5V
T
A
= 25°C
V
IN
= 8V
V
IN
= 3.3V
V
IN
= 6V
V
IN
= 2.7V
LTC1515-X 3.3V Output Voltage
Ripple vs Input Voltage
ELECTRICAL CHARACTERISTICS
V
IN
= 2V to 10V, SHDN = 3V, C1 = 0.22µF, C
IN
= C
OUT
= 10µF unless otherwise noted (Note 2).
PARAMETER CONDITIONS MIN TYP MAX UNITS
POR Leakage Current V
POR
= 5V ● –1 1 µA
POR Trip Point (With Respect to V
OUT
)V
OUT
Ramping Negative ● –10 –7.5 –5 %
POR Trip Point Hysteresis 1%
I
OUT
Short-Circuit Current V
OUT
= 0V ● 12 40 mA
t
ON
Soft Start Turn-On Time 4 ms
POR Delay After V
OUT
Above POR Threshold ● 140 200 280 ms
The
● denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: For V
IN
≥ 8V, C
OUT
= 22µF.
INPUT VOLTAGE (V)
0
OUTPUT VOLTAGE RIPPLE (mV
P-P
)
250
200
150
100
50
0
8
1515 G03
2
4
6
10
V
OUT
= 3.3V
I
OUT
= 10mA
T
A
= 25°C
C
OUT
= 10µF
C
OUT
= 22µF
C
OUT
= 47µF
INPUT VOLTAGE (V)
0
OUTPUT VOLTAGE RIPPLE (mV
P-P
)
250
200
150
100
50
0
8
1515 G04
2
4
6
10
V
OUT
= 5V
I
OUT
= 10mA
T
A
= 25°C
C
OUT
= 10µF
C
OUT
= 47µF
C
OUT
= 22µF
LTC1515-X 5V Output Voltage
Ripple vs Input Voltage
LTC1515-X
3.3V Efficiency vs Output Current
OUTPUT CURRENT (mA)
EFFICIENCY (%)
0.01 1 10
1515 G01
0.1 100
100
80
60
40
20
0
V
OUT
= 3.3V
T
A
= 25°C
V
IN
= 2V
V
IN
= 4.4V
V
IN
= 2.7V
V
IN
= 6V
INPUT VOLTAGE (V)
0
OUTPUT VOLTAGE (V)
3.45
3.40
3.35
3.30
3.25
3.20
8
1515 G05
2
4
6
10
V
OUT
= 3.3V
I
OUT
= 10mA 
C
OUT
= 10µF
T
A
= 25°C