LTC1727 Linear Technology, LTC1727 Datasheet - Page 6

• Manufacturer Part Number: LTC1727
• Description: Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages
• Manufacturer: Linear Technology

LTC1727/LTC1728
PI FU CTIO S
V
Supply Pin. (3V Sense Input and Power Supply Pin for
LTC1728-1.8.) This pin provides power to the part
when the voltage on V
V
ceramic capacitor.
V
Pin. This pin is used on the LTC1727-5/LTC1728-5 to
provide power to the part when the voltage on V
greater than the voltage on V
a 0.1 F ceramic capacitor.
V
Pin. This pin is used on the LTC1727-2.5/LTC1728-2.5 to
provide power to the part when the voltage on V
greater than the voltage on V
a 0.1 F ceramic capacitor.
V
Pin. This pin is used on the LTC1728-1.8 to provide
power to the part when the voltage on V
than the voltage on V
ceramic capacitor.
V
unused, it can be tied to either V
GND (Pin 4/Pin 2): Ground.
6
CC3
CC5
CC5
CC25
CC18
CCA
U
/V
(Pin 3/Pin 3): 1V Sense, High Impedance Input. If
(Pin 2/Pin 4): 5V Sense Input and Power Supply
(Pin 1/Pin 5): 3.3V Sense Input and Power
(Pin 2/Pin 4): 1.8V Sense Input and Power Supply
(Pin 2/Pin 4): 2.5V Sense Input and Power Supply
CC25
U
/V
CC18
. Bypass to ground with a
U
CC3
CC3
. Bypass to ground with a 0.1 F
is greater than the voltage on
(LTC1727/LTC1728)
CC3
CC3
CC3
. Bypass to ground with
. Bypass to ground with
or V
CC5
CC18
/V
CC25
is greater
/V
CC25
0.1 F
CC5
CC18
is
is
.
COMPA (Pin 5): V
Active high, open-drain logic output with weak pull-up to
V
when V
supply pins are too low to power the internal bandgap
reference (typically < 2.0V). Can be pulled greater than
V
RST (Pin 6/Pin 1): Reset Logic Output. Active low, open-
drain logic output with weak pull-up to V
up greater than V
serted when one or all of the supplies are below trip thresh-
olds and held for 200ms after all supplies become valid.
COMP5 (Pin 7): V
LTC1727-5. Active high, open-drain logic output with
weak pull-up to V
Can be pulled greater than V
COMP25 (Pin 7): V
LTC1727-2.5. Active high, open-drain logic output with
weak pull-up to V
V
pull-up.
COMP3 (Pin 8): V
Active high, open-drain logic output with weak pull-up to
V
greater than V
CC3
CC3
RT25
CC3
. Asserted when V
. Asserted when V
using an external pull-up.
. Can be pulled greater than V
CCA
is below V
CC3
CC3
CCA
CC3
CC3
using an external pull-up.
CC3
. Asserted when V
Comparator Output for the LTC1727.
Comparator Output for the LTC1727.
CC5
CC25
when interfacing to 5V logic. As-
. Asserted when V
RTA
CC3
CCA
Comparator Output for the
or if both the V
is above V
Comparator Output for the
CC3
is above V
using an external pull-up.
CC3
RT3
CC5
CC3
using an external
RTA
. Can be pulled
CC25
. Can be pulled
is above V
CC3
. Deasserted
and V
is above
RT5
CC5
.