LTC1727 Linear Technology, LTC1727 Datasheet - Page 3

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

ELECTRICAL CHARACTERISTICS
full operating temperature range, otherwise specifications are at T
otherwise noted.
SYMBOL
t
V
V
LTC1727-5/LTC1728-5 Only
V
LTC1728-1.8 The
T
SYMBOL
V
V
V
V
I
I
I
t
t
V
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: The LTC1727E/LTC1728E are guaranteed to meet specified
performance from 0 C to 70 C and are designed, characterized and
assured to meet the extended temperature limits of – 40 C to 85 C
but are not tested at these temperatures.
Note 4: Both V
on which pin has the greatest potential.
UV
VCC3
VCC18
VCCA
RST
UV
OL
OH
OVR
A
RT3
RT18
RTA
CCOP
OL
OH
= 25 C. V
PARAMETER
V
or COMPX
Output Voltage Low, RST, COMPX
Output Voltage High, RST, COMPX (Note 6)
V
PARAMETER
Reset Threshold V
Reset Threshold V
Reset Threshold V
V
V
V
V
Reset Pulse Width
V
Output Voltage Low, RST
Output Voltage High, RST
CC
CC5
CC3
CC3
CC18
CCA
CC
CC3
CC3
Undervoltage Detect to RST
Undervoltage Detect to RST
, V
Reset Override Voltage (Note 7)
Supply Current
Input Current
= 3V, V
and V
Supply Current
CC18
denotes specifications which apply over the full operating temperature range, otherwise specifications are at
CC5
Operating Voltage
CC18
/V
CC25
CC3
CC18
CCA
= 1.8V, V
/V
CC18
can act as the supply depending
CCA
= V
CC3
CONDITIONS
V
V
V
RST in Correct Logic State
V
V
V
V
RST Low (Note 5)
V
Threshold V
I
I
I
I
I
SINK
SINK
SINK
SINK
SOURCE
CC3
CC18
CCA
CC18
CC18
CC18
CCA
CC18
unless otherwise noted.
Input Threshold
Input Threshold
= 1V
= 2.5mA, V
= 100 A, V
= 100 A, V
= 100 A, V
, V
Input Threshold
> V
< V
< V
CC3
= 1 A (Note 6)
CONDITIONS
V
Threshold V
I
I
I
I
I
Override V
SINK
SINK
SINK
SINK
SOURCE
CC3
CC3
CC3
CC5
RT
or V
, V
, V
, V
All except LTC1728-1.8. The
= 2.5mA, V
= 100 A, V
= 100 A, V
= 100 A, V
by More Than 1%
CC3
CC18
CC25
CCA
CC3
CC3
CC3
CC3
= 1 A
CC5
= 3V (Note 4)
= 1V, V
= 0V, V
= 1V, V
, V
= 1.8V (Note 4)
Less Than Reset (Note 5)
= 3V, V
RT
A
CC3
Ability to Assert RST
by More Than 1% (Note 5)
= 25 C. V
CC3
CC3
CC3
CC3
Note 5: Measured from when input passes through the input threshold
(V
Note 6: The output pins RST and COMPX have internal pull-ups to V
typically 6 A. However, external pull-up resistors may be used when faster
rise times are required or for V
Note 7: The V
than approximately 4.15V. Above this point the override is turned off and
the V
or V
CC18
CC18
CC18
CC18
RTX
= 3V, V
= 1V, V
= 0V, V
= 1V, V
CCA
CC5
) until RST or COMPX passes through 1.5V.
= 0V
= 0V
= 1V
= 1V
Less Than Reset
pin functions normally.
CC3
CC5
CC5
CC5
CC5
/V
/V
/V
/V
= 3.3V, V
CC5
CC25
CC25
CC25
CC25
reset override voltage is valid for an operating range less
= 0V
= 0V
= 1V
= 1V
denotes specifications which apply over the
CC5
= 5V, V
OH
LTC1727/LTC1728
voltages greater than V
V
V
CC3
2.760
1.656
0.985
CC3
CC25
MIN
MIN
– 15
140
1
– 1
– 1
= 2.5V, V
V
CC3
2.805
1.683
1.000
0.15
0.05
0.05
0.05
0.15
0.05
0.05
0.05
TYP
TYP
110
200
110
10
1
1
0
0.025
CCA
CC3
= V
2.850
1.710
1.015
MAX
MAX
280
0.4
0.3
0.3
0.3
0.4
0.3
0.3
0.3
20
15
7
2
2
.
CC3
unless
CC3
UNITS
UNITS
3
ms
of
nA
V
V
V
V
V
V
V
V
V
V
A
A
A
V
V
V
V
V
s
s