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MIC2779H-2BM5

Description
Voltage Monitor with Adjustable Hysteresis
CategoryPower/power management    The power supply circuit   
File Size155KB,7 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Download Datasheet Parametric Compare View All

MIC2779H-2BM5 Overview

Voltage Monitor with Adjustable Hysteresis

MIC2779H-2BM5 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
Parts packaging codeSOT-23
package instructionLSSOP, TSOP5/6,.11,37
Contacts5
Reach Compliance Codecompli
ECCN codeEAR99
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G5
JESD-609 codee0
length2.91 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals5
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeLSSOP
Encapsulate equivalent codeTSOP5/6,.11,37
Package shapeRECTANGULAR
Package formSMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)240
power supply1.5/5.5 V
Certification statusNot Qualified
Maximum seat height1.45 mm
Maximum supply current (Isup)0.002 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)1.5 V
Nominal supply voltage (Vsup)1.6 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Threshold voltage nominal+1.24V
Maximum time at peak reflow temperature30
width1.625 mm
Base Number Matches1
MIC2779
Micrel, Inc.
MIC2779
Voltage Monitor with Adjustable Hysteresis
General Description
The MIC2779 is a voltage monitor—uniquely designed to
detect two separate voltage thresholds—combined with a
delay generator and logic. It is designed for monitoring the
battery supply of portable digital systems, particularly PDAs,
pagers, and cellular telephones.
High- and low-voltage thresholds can be adjusted inde-
pendently, allowing for wide hysteresis. Voltage detection
thresholds are accurate to 2%.
If the battery voltage falls below the low-voltage threshold,
the output /RST or RST is asserted and latched, preventing
system operation until the battery is replaced or recharged.
Internal logic prevents the output from chattering due to battery
recovery or load removal. The output is asserted for 140ms
(minimum) when a fresh battery is inserted. For applications
requiring open-drain output, see MIC2778/MIC833.
The IC’s power supply input is separate from the detector
inputs, allowing the MIC2779 to be powered from a down-
stream supply, such a boost converter. Supply current is
extremely low (1µA, typical), making it ideal for portable
applications.
A high-precision 1% grade is available. The MIC2779 is sup-
plied in Micrel’s IttyBitty™ 5-pin SOT-23-5 package.
Features
• Optimized for PDAs, cellular telephones, pagers,
and other battery-powered devices
• Independently adjustable high- and
low-voltage thresholds
• Internal logic prevents battery-voltage-fluctuation chatter
• High ±2% voltage threshold accuracy; 1% available
• Built in 140ms (minimum) delay deglitches output
• Extremely low 1µA typical supply current
• For applications requiring open-drain output, see
MIC2778/MIC833
• Immune to brief power supply transients
• 5-pin SOT-23 package
Applications
PDAs
Pagers
Cordless phones
Consumer electronics
Embedded controllers
Personal electronics
Typical Application
MIC5207-3.0BM5
Li-Ion
Cell
604k
1%
56k
1%
340k
1%
MIC2779L
VDD / R S T
LTH
HTH GND
IN
EN
OUT
BYP
GND
V
OU T
3.0V
4.7µF
470pF
V
BAT(hi)
= 3.6V
V
BAT(lo)
= 3.1V
Cellular Telephone Battery Monitor
IttyBitty™ is a trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
January 2006
1
MIC2779

MIC2779H-2BM5 Related Products

MIC2779H-2BM5 MIC2779H-1BM5 MIC2779L-1BM5 MIC2779_11 MIC2779 MIC2779L-2BM5
Description Voltage Monitor with Adjustable Hysteresis Voltage Monitor with Adjustable Hysteresis Voltage Monitor with Adjustable Hysteresis Voltage Monitor with Adjustable Hysteresis Voltage Monitor with Adjustable Hysteresis Voltage Monitor with Adjustable Hysteresis
Is it lead-free? Contains lead Contains lead Contains lead - - Contains lead
Is it Rohs certified? incompatible incompatible incompatible - - incompatible
Parts packaging code SOT-23 SOT-23 SOT-23 - - SOT-23
package instruction LSSOP, TSOP5/6,.11,37 LSSOP, TSOP5/6,.11,37 LSSOP, TSOP5/6,.11,37 - - LSSOP, TSOP5/6,.11,37
Contacts 5 5 5 - - 5
Reach Compliance Code compli compli compli - - compli
ECCN code EAR99 EAR99 EAR99 - - EAR99
Adjustable threshold YES YES YES - - YES
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT - - POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G5 R-PDSO-G5 R-PDSO-G5 - - R-PDSO-G5
JESD-609 code e0 e0 e0 - - e0
length 2.91 mm 2.91 mm 2.91 mm - - 2.91 mm
Humidity sensitivity level 1 1 1 - - 1
Number of channels 1 1 1 - - 1
Number of functions 1 1 1 - - 1
Number of terminals 5 5 5 - - 5
Maximum operating temperature 85 °C 85 °C 85 °C - - 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C - - -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - - PLASTIC/EPOXY
encapsulated code LSSOP LSSOP LSSOP - - LSSOP
Encapsulate equivalent code TSOP5/6,.11,37 TSOP5/6,.11,37 TSOP5/6,.11,37 - - TSOP5/6,.11,37
Package shape RECTANGULAR RECTANGULAR RECTANGULAR - - RECTANGULAR
Package form SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH - - SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 240 240 240 - - 240
power supply 1.5/5.5 V 1.5/5.5 V 1.5/5.5 V - - 1.5/5.5 V
Certification status Not Qualified Not Qualified Not Qualified - - Not Qualified
Maximum seat height 1.45 mm 1.45 mm 1.45 mm - - 1.45 mm
Maximum supply current (Isup) 0.002 mA 0.002 mA 0.002 mA - - 0.002 mA
Maximum supply voltage (Vsup) 5.5 V 5.5 V 5.5 V - - 5.5 V
Minimum supply voltage (Vsup) 1.5 V 1.5 V 1.5 V - - 1.5 V
Nominal supply voltage (Vsup) 1.6 V 1.6 V 1.6 V - - 1.6 V
surface mount YES YES YES - - YES
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL - - INDUSTRIAL
Terminal surface Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) - - Tin/Lead (Sn85Pb15)
Terminal form GULL WING GULL WING GULL WING - - GULL WING
Terminal pitch 0.95 mm 0.95 mm 0.95 mm - - 0.95 mm
Terminal location DUAL DUAL DUAL - - DUAL
Threshold voltage nominal +1.24V +1.24V +1.24V - - +1.24V
Maximum time at peak reflow temperature 30 30 30 - - 30
width 1.625 mm 1.625 mm 1.625 mm - - 1.625 mm
Base Number Matches 1 1 1 - - 1
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