LTC1985ES5-1.8 Linear Technology, LTC1985ES5-1.8 Datasheet - Page 4

• Manufacturer Part Number: LTC1985ES5-1.8
• Description: Micropower Precision Triple Supply Monitor with Push-Pull Reset Output in a 5-Lead SOT-23 Package
• Manufacturer: Linear Technology

BLOCK DIAGRA
PI FU CTIO S
LTC1985-1.8
RST (Pin 1): Reset Logic Output. Active low, 3V push-
pull output. Asserted when one or all of the supplies are
below trip thresholds and held for 200ms after all sup-
plies become valid.
GND (Pin 2): Ground.
V
it can be tied to either V
4
CCA
U
(Pin 3): 1V Sense, High Impedance Input. If unused
U
V
V
V
CC18
GND
CC3
CCA
5
4
3
2
U
POWER
DETECT
CC3
W
or V
CC18
.
V
CC
INTERNAL
–
+
–
+
–
+
REFERENCE
BANDGAP
V
This pin is used on the LTC1985 to provide power to the
part when the voltage on V
on V
capacitor.
V
pin provides power to the part when the voltage on V
is greater than the voltage on V
with a 0.1 F ceramic capacitor.
CC18
CC3
(Pin 5): 3V Sense Input and Power Supply Pin. This
CC3
(Pin 4): 1.8V Sense Input and Power Supply Pin.
200ms PULSE GENERATOR
. Bypass to ground with a
200ms
DELAY
CC18
LTC1985-1.8
is greater than the voltage
CC18
V
CC3
1985-18 BD
. Bypass to ground
1 RST
0.1 F ceramic
CC3