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LTC2935CDC-4#TRPBF

Description
IC supervisor ultra LP 8-dfn
CategoryPower/power management    The power supply circuit   
File Size131KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC2935CDC-4#TRPBF Overview

IC supervisor ultra LP 8-dfn

LTC2935CDC-4#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeDFN
package instructionHVSON, SOLCC8,.08,18
Contacts8
Manufacturer packaging codeDC8
Reach Compliance Codecompli
ECCN codeEAR99
Other featuresSELECTABLE THRESHOLD VOLTAGE; MANUAL RESET INPUT
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-N8
JESD-609 codee3
length2 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Encapsulate equivalent codeSOLCC8,.08,18
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
power supply3.6 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply current (Isup)0.001 mA
Maximum supply voltage (Vsup)5.5 V
Nominal supply voltage (Vsup)3.6 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.45 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width2 mm
Base Number Matches1
LTC2935
Ultra-Low Power Supervisor
with Power-Fail Output,
Selectable Thresholds
FEATURES
n
n
n
n
n
n
n
n
n
DESCRIPTION
The LTC
®
2935 ultra-low power voltage monitor provides
system initialization, power-fail warning and reset gen-
eration functions. Low quiescent current (500nA typical)
makes the LTC2935 an ideal choice for battery-operated
applications.
Three binary threshold-select inputs configure one of
eight integrated reset thresholds, ranging from 1.6V to
3.45V in pre-determined increments. Early warning of an
impending low voltage condition is provided at the power-
fail output (PFO), whose threshold is above the configured
reset threshold. Supervisory circuits monitor V
CC
and
pull
RST
low when V
CC
drops below the configured reset
threshold. When V
CC
is rising from an under-threshold
condition, an internal reset timer is started after exceeding
the reset threshold by 5%. A 200ms reset timeout delays
the return of the
RST
output to a high state. A pushbut-
ton switch connected to the
MR
input is typically used to
force a manual reset. Outputs
RST
and
PFO
are available
with open-drain (LTC2935-1/LTC2935-3) or active pull-up
(LTC2935-2/LTC2935-4) circuits. Operating temperature
range is from –40°C to 85°C.
500nA Quiescent Current
±1.5% (Max) Accuracy over Temperature
Integrated Precision Attenuators
Eight Pin-Selectable Reset Thresholds
Eight Pin-Selectable Power-Fail Thresholds
Early Warning Power-Fail Output
200ms Reset Timeout
Manual Reset Input
Compact 8-Lead, 2mm
×
2mm DFN and
TSOT-23 (ThinSOT™) Packages
APPLICATIONS
n
n
n
n
n
Portable Equipment
Battery-Powered Equipment
Security Systems
Point-of-Sale Devices
Wireless Systems
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
Falling Threshold Selection Table
Configurable Low Power Voltage Monitor
V
IN
V
CC
0.1μF
S2
S1
S0
MR
GND
2935 TA01a
LTC2935-1/LTC2935-2
LTC2935-3/LTC2935-4
PFO
LTC2935-2
BATTERY
POWERED
SYSTEM
LOGIC
RST
RESET
POWER-FAIL
RESET
POWER-FAIL
THRESHOLD THRESHOLD THRESHOLD THRESHOLD
(V)
(V)
(V)
(V)
3.30
3.15
3.00
2.85
2.70
2.55
2.40
2.25
3.45
3.30
3.15
3.00
2.85
2.70
2.55
2.40
2.44
2.32
2.20
2.08
1.96
1.84
1.72
1.60
2.56
2.44
2.32
2.20
2.08
1.96
1.84
1.72
S2
Low
Low
Low
Low
High
High
High
High
S1
Low
Low
High
High
High
Low
Low
High
S0
Low
High
High
Low
Low
Low
High
High
2935fa
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