2
LTC1540
sn1540 1540fas
Voltage
V
+
to V
–
, V
+
to GND, GND to V
–
...........12V to –0.3V
IN
+
, IN
–
, HYST ................. (V
+
+ 0.3V) to (V
–
– 0.3V)
REF ................................... (V
+
+ 0.3V) to (V
–
– 0.3V)
OUT ............................... (V
+
+ 0.3V) to (GND – 0.3V)
Current
IN
+
, IN
–
, HYST ................................................. 20mA
REF ................................................................... 20mA
OUT .................................................................. 50mA
ABSOLUTE MAXIMUM RATINGS
W
WW
U
OUT Short-Circuit Duration (V
+
≤ 5.5V) ...... Continuous
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC1540C .............................................. 0°C to 70°C
LTC1540I............................................ –40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
(DD Package) ................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
W
U
U
LTC1540CMS8
LTC1540IMS8
MS8
PART MARKING
T
JMAX
= 150°C, θ
JA
= 175°C/ W
1
2
3
4
8
7
6
5
TOP VIEW
OUT
V
+
REF
HYST
GND
V
–
IN
+
IN
–
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
GND
V
–
IN
+
IN
–
8
7
6
5
OUT
V
+
REF
HYST
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C, θ
JA
= 250°C/ W
ORDER PART
NUMBER
S8
PART MARKING
ORDER PART
NUMBER
LTCE
LTADV
LTC1540CS8
LTC1540IS8
1540
1540I
TOP VIEW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
4
3
2
1GND
V
–
IN
+
IN
–
OUT
V
+
REF
HYST
T
JMAX
= 125°C, θ
JA
= 160°C/ W (NOTE 2) UNDERSIDE METAL
CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
ORDER PART
NUMBER
LTC1540CDD
LTC1540IDD
DD
PART MARKING*
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*Temperature grades are identified by a label on the shipping container.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, V
–
= GND = 0V, T
A
= 25°C unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
+
Supply Voltage Range ● 2.0 11.0 V
I
CC
Supply Current IN
+
= IN
–
= 80mV, HYST = REF, C-Grade ● 0.3 0.68 µA
IN
+
= IN
–
= 80mV, HYST = REF, I-Grade ● 0.71 µA
Comparator
V
OS
Comparator Input Offset Voltage V
CM
= 2.5V ±12 mV
● ±15 mV
LTC1540CMS8/IMS8
● ±16 mV
I
IN
Input Leakage Current (IN
+
, IN
–
)V
IN
+
= V
IN
–
= 2.5V ● ±0.01 ±1.0 nA
Input Leakage Current (HYST)
● ±0.02 ±1.0 nA
V
CM
Comparator Input Common Mode Range ● V
–
V
+
– 1.3V V
CMRR Common Mode Rejection Ratio V
–
to V
+
– 1.3V 0.1 1 mV/V
PSRR Power Supply Rejection Ratio V
+
= 2V to 11V 0.1 1 mV/V
LAAS
