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LTC2909CDDB-3.3#TRMPBF

Description
IC MONITOR PREC 3.3V 8-DFN
CategoryPower/power management    The power supply circuit   
File Size183KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC2909CDDB-3.3#TRMPBF Overview

IC MONITOR PREC 3.3V 8-DFN

LTC2909CDDB-3.3#TRMPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeDFN
package instructionHVSON,
Contacts8
Manufacturer packaging codeDDB
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-N8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of channels2
Number of functions3
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
Minimum supply voltage (Vsup)0.5 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceTin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width2 mm
Base Number Matches1
LTC2909
Precision Triple/Dual Input
UV, OV and Negative
Voltage Monitor
FEATURES
DESCRIPTIO
Two Low Voltage Adjustable Inputs (0.5V)
Pin Selectable Input Polarity Allows Negative
and OV Monitoring
Guaranteed Threshold Accuracy: ±1.5%
6.5V Shunt Regulator for High Voltage Operation
Low 50μA Quiescent Current
Buffered 1V Reference for Negative Supply Offset
Input Glitch Rejection
Adjustable Reset Timeout Period
Selectable Internal Timeout Saves Components
Open-Drain
R
S
T Output
Accurate UVLO for 2.5V, 3.3V, 5V Systems
Ultralow Voltage Reset: V
CC
= 0.5V Guaranteed
Space Saving 8-Lead TSOT-23 and 3mm
×
2mm DFN
Packages
The LTC
®
2909 is a dual input monitor intended for a variety
of system monitoring applications. Polarity selection and
a buffered reference output allow the LTC2909 to monitor
positive and negative supplies for undervoltage (UV) and
overvoltage (OV) conditions.
The two inputs have a nominal 0.5V threshold, featuring
tight 1.5% threshold accuracy over the entire operating
temperature range. Glitch filtering ensures reliable reset
operation without false triggering. A third fixed-threshold
UVLO monitor on the part’s V
CC
(also 1.5% accuracy) is
available for standard logic supplies.
The common reset output has a timeout that may use
a preset 200ms, be set by an external capacitor or be
disabled. A three-state input pin sets the input polarity
of each adjustable input without requiring any external
components.
The LTC2909 provides a highly versatile, precise, space-
conscious, micropower solution for supply monitoring.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
Desktop and Notebook Computers
Handheld Devices
Network Servers
Core, I/O Monitor
Automotive
TYPICAL APPLICATIO
3.3V UV/OV (Window) Monitor Application with
200ms Internal Timeout (3.3V Logic Out)
C
BYP
100nF
3.3V
R
P6
453k
ADJ1
R
P5
10.7k
V
CC
RST
LTC2909-2.5
REF
ADJ2
R
P4
76.8k
GND
2909 TA01a
SEL Pin Connection for Input Polarity
Combinations
POLARITY
R
PU
10k
FAULT
OUTPUT
ADJ1
+
+
SEL
TMR
U
ADJ2
SEL PIN
V
CC
OPEN
GND
U
U
+
2909fb
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