Datasheet

2
LTC1515 Series
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Note 1)
V
IN
to GND................................................ –0.3V to 12V
V
OUT
to GND ............................................. –0.3V to 12V
SHDN, 5/3, FB to GND.............................. – 0.3V to 12V
V
OUT
Short-Circuit Duration............................. Indefinite
Operating Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ............................................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART NUMBER
ORDER PART
NUMBER
S8 PART MARKING
LTC1515CS8-3/5
LTC1515CS8-3.3/5
LTC1515IS8-3/5
LTC1515IS8-3.3/5
151535
515335
515I35
15I335
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
OUT
V
IN

C1
+

C1
–
SHDN
POR
5/3
GND
S8 PACKAGE
8-LEAD PLASTIC SO
LTC1515CS8
LTC1515IS8
S8 PART MARKING
1515
1515I
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
OUT
V
IN

C1
+

C1
–
SHDN
POR
FB
GND
S8 PACKAGE
8-LEAD PLASTIC SO
Consult factory for Military grade parts.
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
V
IN
Operating Voltage V
OUT
= 5V ● 2.7 10 V
V
OUT
= 3V/3.3V ● 2.0 8 V
V
OUT
= ADJ ● 2.0 10 V
V
OUT
= 3V (LTC1515-3/5) 2V ≤ V
IN
≤ 8V, I
OUT
≤ 15mA ● 2.88 3.0 3.12 V
3V ≤ V
IN
≤ 8V, I
OUT
≤ 50mA ● 2.88 3.0 3.12 V
V
OUT
= 3.3V (LTC1515-3.3/5) 2V ≤ V
IN
≤ 8V, I
OUT
≤ 15mA ● 3.17 3.3 3.43 V
3V ≤ V
IN
≤ 8V, I
OUT
≤ 50mA ● 3.17 3.3 3.43 V
V
OUT
= 5V (LTC1515-3/5, LTC1515-3.3/5) 2.7V ≤ V
IN
≤ 10V, I
OUT
≤ 15mA ● 4.8 5.0 5.2 V
3.3V ≤ V
IN
≤ 10V, I
OUT
≤ 50mA ● 4.8 5.0 5.2 V
V
FB
Feedback Voltage LTC1515, V
FB
Ramping Negative ● 1.190 1.232 1.275 V
V
FB
Feedback Hysteresis LTC1515 1 %
Effective Output Resistance LTC1515, V
IN
= 3V, Step-Up Mode ● 30 Ω
V
IN
Operating Current V
IN
≤ 5V, I
OUT
= 0, SHDN = 3V ● 60 100 µA
V
IN
> 5V, I
OUT
= 0, SHDN = 3V ● 75 135 µA
V
IN
Shutdown Current SHDN = 0V, V
IN
≤ 5V ● 1 µA
SHDN = 0V, V
IN
> 5V 25 µA
Output Ripple Full Load (Note 2) 100 mV
P-P
Switching Frequency Full Load ● 500 650 800 kHz
5/3, SHDN Input Threshold V
IL
● 0.4 1.0 V
V
IH
● 1.0 1.6 V
5/3, SHDN Input Current 5/3, SHDN = V
IN
● –1 1 µA
5/3, SHDN = 0V ● –1 1 µA
FB Input Current FB = 1.232V ● –50 50 nA
POR Output Low Voltage I
SINK
= 100µA, V
IN
= 3V ● 0.05 0.4 V