LTC2901 Linear Technology, LTC2901 Datasheet - Page 3

• Manufacturer Part Number: LTC2901
• Description: Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
t
V
V
V
V
I
I
t
V
V
t
I
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: The greater of V1, V2 is the internal supply voltage (V
Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent
current. If at any time V2 is larger than V1, V2 must be capable of supplying
the quiescent current, programming (transient) current and reference load
current.
UV
CWT(UP)
CWT(DN)
WD
WP
WDI
OL
OH
OL
OH
IH
IL
PARAMETER
V
Output Voltage Low RST, COMPX
Output Voltage High RST, WDO, COMPX
(Note 5)
Output Voltage Low WDO
Output Voltage High RST (LTC2901-2)
(Note 6)
CWT Pull-Up Current
CWT Pull-Down Current
Watchdog Time-Out Period
WDI Input Threshold High
WDI Input Threshold Low
WDI Input Pulse Width
WDI Pull-Up Current
X
Undervoltage Detect to RST or COMPX
A
CONDITIONS
V
by More Than 1%
I
V3, V4 = 0V; V
I
I
I
I
V3, V4 = 1V; V
I
V
V
C
V
V
V
V
CC
SINK
SINK
SINK
SOURCE
SINK
SOURCE
= 25 C. V
X
CWT
CWT
WT
CC
CC
CC
WDI
).
Less Than Reset Threshold V
= 3.3V to 5.5V
= 3.3V to 5.5V
= 3.3V
= 1500pF
= 2.5mA; V1 = 3V, V2 = 3V;
= 100 A; V2 = 1V; V1, V3, V4 = 0V
= 100 A; V1 = 1V; V2, V3, V4 = 0V
= 2.5mA; V1 = 5V, V2 = 3.3V;
= 0V
= 0V
= 1.3V
The
= 1 A
= 200 A
CC
denotes the specifications which apply over the full operating
PG
PG
= 5V, unless otherwise noted. (Note 3)
= 0V
= 0V
Note 5: The output pins RST, WDO and COMPX have internal pull-ups to V2
of typically 6 A. However, external pull-up resistors may be used when faster
rise times are required or for V
Note 6: The push-pull RST output pin on the LTC2901-2 is actively pulled up
to V2.
RTX
OH
0.8 • V2
voltages greater than V2.
V2 – 1
–1.4
MIN
150
0.4
10
20
0.15
0.05
0.05
0.15
TYP
150
–10
–2
20
30
LTC2901
MAX
–2.6
0.4
0.3
0.3
0.4
1.6
30
40
2901is sn2901
UNITS
3
ms
ns
V
V
V
V
V
V
A
A
V
V
A
s