Datasheet

2
LTC1503-1.8/LTC1503-2
Industrial Temperature Range ............... –40°C to 85°C
Specified Temperature Range (Note 2)... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
(Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage ● 2.4 6 V
V
OUT
LTC1503-1.8, 0mA < I
OUT
< 100mA ● 1.728 1.8 1.872 V
LTC1503-2, 0mA < I
OUT
< 100mA ● 1.920 2.0 2.080 V
V
IN
Operating Current I
OUT
= 0mA ● 25 50 µA
V
IN
Shutdown Current SHDN/SS = 0V ● 510 µA
Output Ripple Voltage LTC1503-X, V
IN
= 3.6V, I
OUT
= 100mA 25 mV
P-P
Efficiency LTC1503-2, V
IN
= 3.6V, I
OUT
= 100mA 82.9 %
Switching Frequency Oscillator Free Running 600 kHz
SHDN/SS Input Threshold ● 0.2 0.35 0.5 V
SHDN/SS Input Current V
SHDN/SS
= 0V (Note 3) ● –3.5 –2 –1 µA
V
SHDN/SS
= V
IN
● –1 1 µA
V
OUT
Short-Circuit Current V
OUT
= 0V (Note 4) ● 82250 mA
V
OUT
Turn-On Time C
SS
= 0nF, V
IN
= 3.6V, C
OUT
= 10µF 0.1 ms
C
SS
= 10nF 8 ms
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1503C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet these
extended temperature limits, but are not tested at –40°C and 85°C. The
LTC1503I is guaranteed to meet the extended temperature limits.
Note 3: Currents flowing into the device are positive polarity. Currents
flowing out of the device are negative polarity.
Note 4: When V
OUT
is less than 150mV, I
OUT
is limited to much less than
the maximum rated output current to prevent damage to the output
devices.
ORDER PART
NUMBER
LTC1503CMS8-1.8
LTC1503CMS8-2
MS8 PART MARKING
LTFX
LTHN
ORDER PART
NUMBER
LTC1503CS8-1.8
LTC1503CS8-2
LTC1503IS8-1.8
LTC1503IS8-2
S8 PART MARKING
150318
15032
Consult factory for Military grade parts.
T
JMAX
= 125°C, θ
JA
= 200°C/W
1
2
3
4
V
OUT
C1
–
C1
+
V
IN
8
7
6
5
C2
–
GND
C2
+
SHDN/SS
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 150°C/W
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
V
OUT
C1
–
C1
+
V
IN
C2
–
GND
C2
+
SHDN/SS
V
IN
, C1
+
, C1
–
, C2
+
, C2
–
to GND............... –0.3V to 6.5V
SHDN/SS to GND......................... –0.3V to (V
IN
+ 0.3V)
V
OUT
Short-Circuit Duration............................. Indefinite
Commercial Temperature Range ............ –40°C to 85°C
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= V
IN(MIN)
to V
IN(MAX)
, C1 = C2 = 1µF, C
IN
= C
OUT
= 10µF unless otherwise noted.
503I18
1503I2
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
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ELECTRICAL CHARACTERISTICS