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LTC2901-1IGN#TRPBF

Description
Processor Supervisor 4 Active Low/Open Drain Automotive 16-Pin SSOP N T/R
File Size178KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC2901-1IGN#TRPBF Overview

Processor Supervisor 4 Active Low/Open Drain Automotive 16-Pin SSOP N T/R

LTC2901-1IGN#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
Number of Supervisors4
Output DriverActive Low/Open Drain
Monitored Voltage (V)1.8|2.5|3.3|5
Minimum Operating Supply Voltage (V)1
Maximum Supply Current (uA)75
Power Fail DetectionNo
Watchdog TimerYes
Manual ResetNo
Chip Enable SignalsNo
Battery Backup SwitchingNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTape and Reel
TypeVoltage Monitor
Pin Count16
Standard Package NameSOP
Supplier PackageSSOP N
MountingSurface Mount
Package Height1.5(Max)
Package Length4.98(Max)
Package Width3.99(Max)
PCB changed16
Lead ShapeGull-wing
LTC2901
Programmable Quad Supply
Monitor with Adjustable Reset
and Watchdog Timers
FEATURES
DESCRIPTIO
Simultaneously Monitors Four Supplies
16 User Selectable Combinations of 5V, 3.3V, 3V,
2.5V, 1.8V, 1.5V and/or
±Adj
Voltage Thresholds
Guaranteed Threshold Accuracy:
±1.5%
of
Monitored Voltage Over Temperature
Selectable Supply Tolerance: 5% and 10% Below
Monitored Voltage (LTC2901-3/LTC2901-4)
Low Supply Current: 43μA Typ
Adjustable Reset Time
Adjustable Watchdog Time
Open-Drain RST Output (LTC2901-1/LTC2901-3)
Push-Pull RST Output (LTC2901-2/LTC2901-4)
Individual Nondelayed Monitor Output for Each Supply
Power Supply Glitch Immunity
Guaranteed RST for V
CC
1V
16-Lead Narrow SSOP Package
The LTC
®
2901 is a programmable supply monitor for
systems with up to four supply voltages. One of 16 preset
or adjustable voltage monitor combinations can be se-
lected using an external resistor divider connected to the
program pin. The preset voltage thresholds are accurate
to
±1.5%
over temperature. All four voltage comparator
outputs are connected to separate pins for individual
supply monitoring.
The reset and watchdog delay times are adjustable using
external capacitors. Tight voltage threshold accuracy and
glitch immunity ensure reliable reset operation without
false triggering. The RST output is guaranteed to be in the
correct state for V
CC
down to 1V. The LTC2901-1/
LTC2901-3 features an open-drain RST output, while the
LTC2901-2/LTC2901-4 has a push-pull RST output.
The 43μA supply current makes the LTC2901 ideal for
power conscious systems and it may be configured to
monitor less than four inputs. The parts are available in
the 16-lead narrow SSOP package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Patent Pending.
APPLICATIO S
Desktop and Notebook Computers
Multivoltage Systems
Telecom Equipment
Portable Battery-Powered Equipment
Network Servers
TYPICAL APPLICATIO
5V
3.3V
DC/DC
CONVERTER
2.5V
1.8V
Quadruple Supply Monitor (5V, 3.3V, 2.5V, 1.8V)
SYSTEM
LOGIC
Quadruple Supply Monitor (5V, 3.3V, 2.5V, 1.8V)
10% Undervoltage Monitoring, Watchdog Asserts RST
5V
3.3V
DC/DC
CONVERTER
2.5V
1.8V
SYSTEM
LOGIC
V3
V1
V4
COMP1
R3
10k POWER
GOOD
V2
C1
0.1μF
C2
0.1μF
V
REF
R1
59k
1%
R2
40.2k
1%
COMP2
LTC2901-2
COMP3
COMP4
WDI
WDO
C1
0.1μF
C2
0.1μF
V
PG
GND CRT
C
RT
47nF
RST
CWT
C
WT
47nF
2901 TA01
R1
59k
1%
R2
40.2k
1%
t
RST
= 216ms
t
WD
= 940ms
U
V3
V1
V4
COMP1
COMP2
LTC2901-4
COMP3
COMP4
V
REF
WDI
TOL
V
PG
GND CRT
C
RT
47nF
RST
CWT
C
WT
47nF
t
RST
= 216ms
t
WD
= 940ms
5V
2901 TA01b
U
U
R3
10k POWER
GOOD
V2
2901fb
1
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