LTC1727 Linear Technology, LTC1727 Datasheet - Page 11
![no-image](/images/manufacturer_photos/0/3/388/linear_technology_sml.jpg)
LTC1727
Manufacturer Part Number
LTC1727
Description
Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages
Manufacturer
Linear Technology
Datasheet
1.LTC1727.pdf
(16 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1727EMS8
Manufacturer:
FUJ
Quantity:
30
Company:
Part Number:
LTC1727EMS8 LTHY
Manufacturer:
ST
Quantity:
14 400
Company:
Part Number:
LTC1727EMS8-2.5
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC1727EMS8-2.5
Manufacturer:
LT
Quantity:
1 970
Part Number:
LTC1727EMS8-2.5
Manufacturer:
LT/凌特
Quantity:
20 000
Company:
Part Number:
LTC1727EMS8-2.5#PBF
Manufacturer:
LT
Quantity:
5 000
Part Number:
LTC1727EMS8-5
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1727EMS8-5#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LTC1727ES8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S I FOR ATIO
Figure 4 contains a simple circuit for 5V systems that can’t
risk the RST output going high in the 3.1V to 4.15V range
(possibly due to very slow rise time on the 5V supply).
Diode D1 powers the LTC1728-5 while dropping 0.6V
from the V
internal override circuit from being activated. Without the
override circuit active, the RST pin stays low until V
reaches V
RT5
CC5
pin to the V
4.675V. (See Figure 5.)
U
CC3
U
pin. This prevents the part’s
W
5V
0.1 F
Figure 4. LTC1728-5 Monitoring a Single 5V
Supply. D1 Used to Avoid RST High Near 3.1V
to 4V (See Figure 3).
Figure 5. RST Output Voltage
Characteristics of the Circuit in Figure 4
5
4
3
2
1
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
D1
V
10k PULL-UP FROM RST TO V
T
CC5
A
U
= 25 C
= V
5
4
3
2
D1: MMBD914 OR EQUIVALENT
CCA
V
V
V
GND
CC3
CC5
CCA
LTC1728-5
CC5
= 0V TO 5V
V
CC5
RST
(V)
LTC1727-2.5/LTC1728-2.5/LTC1728-1.8
Override Functions
The V
V
V
point for V
be tied to V
V
result in the continuous assertion of RST.
CC18
CC3
CC25
1
CC5
and V
CCA
. This is an obvious solution since the trip points for
/V
CC18
R1
10k
1727/28 F05
pin, if unused, can be tied to either V
CCA
CC25
CC3
and operating off of a 2.5V/1.8V supply will
TO SYSTEM
RESET
. Likewise, the V
. V
/V
1727/28 F04
CC3
CC18
must always be used. Tying V
will always be greater than the trip
LTC1727/LTC1728
CC25
/V
CC18
, if unused, can
CC3
or V
11
CC3
CC25
to
/