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LTC2905ITS8#PBF

Description
LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C
CategoryPower/power management    The power supply circuit   
File Size147KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC2905ITS8#PBF Overview

LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C

LTC2905ITS8#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeSOT
package instructionVSSOP, TSSOP8,.1
Contacts8
Manufacturer packaging codeTS8
Reach Compliance Codecompliant
ECCN codeEAR99
Is SamacsysN
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length2.9 mm
Humidity sensitivity level1
Number of channels2
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeVSSOP
Encapsulate equivalent codeTSSOP8,.1
Package shapeRECTANGULAR
Package formSMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
power supply1,2.5 V
Certification statusNot Qualified
Maximum seat height1 mm
Minimum supply voltage (Vsup)1 V
Nominal supply voltage (Vsup)1 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width1.625 mm
Base Number Matches1
FEATURES
n
n
n
n
n
n
n
n
n
n
n
LTC2904/LTC2905
Precision Dual Supply
Monitors with Pin-Selectable
Thresholds
DESCRIPTION
The LTC
®
2904/LTC2905 are dual supply monitors in-
tended for systems with two supply voltages. The dual
supply monitors have a common reset output with delay
(200ms for the LTC2904 and adjustable using an exter-
nal capacitor for the LTC2905). This product provides a
precise, space-conscious and micropower solution for
supply monitoring.
The LTC2904/LTC2905 feature a tight 1.5% threshold
accuracy over the whole operating temperature range, and
glitch immunity to ensure reliable reset operation without
false triggering. The open drain
RST
output is guaranteed
to be in the correct state for inputs down to 1V.
The LTC2904/LTC2905 also feature three programming
input pins, which program the threshold and tolerance level
without requiring any external components. These three
programming pins provide a total of 27 different voltage
level and tolerance combinations, eliminating the need to
have different parts for development and implementation
of different systems with different voltage levels requiring
monitoring function.
Monitors Two Inputs Simultaneously
Nine Threshold Combinations
Three Supply Tolerances (5%, 7.5%, 10%)
Guaranteed Threshold Accuracy:
±1.5%
of
Monitored Voltage Over Temperature
Internal V
CC
Auto Select
Power Supply Glitch Immunity
200ms Reset Time Delay (LTC2904 Only)
Adjustable Reset Time Delay (LTC2905 Only)
Open Drain
RST
Output
Guaranteed
RST
for V1 ≥ 1V or V2 ≥ 1V
Low Profile (1mm) SOT-23 (ThinSOT™) and
Plastic (3mm
×
2mm) DFN Packages
APPLICATIONS
n
n
n
n
Desktop and Notebook Computers
Handheld Devices
Network Servers
Core, I/O Monitor
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
5V, 3.3V Dual Supply Monitor with 5% Tolerance
DC/DC
CONVERTER
5V
3.3V
SYSTEM
LOGIC
Table 1. Voltage Threshold Programming
V1
5.0
3.3
3.3
V2
3.3
2.5
1.8
1.5
1.2
1.8
1.5
1.2
1.0
S1
V1
Open
V1
Open
Open
GND
GND
GND
V1
S2
V1
GND
Open
V1
Open
GND
Open
V1
GND
V1
0.1μF
S1
S2
TOL
LTC2905
V2
0.1μF
TMR
22nF
GND
RST
3.3
3.3
2.5
2.5
29045 TA01
2.5
2.5
29045fd
1

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Description LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C LTC2904 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C LTC2904 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: 0°C to 70°C LTC2904 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: DFN; Pins: 8; Temperature Range: 0°C to 70°C LTC2904 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: DFN; Pins: 8; Temperature Range: 0°C to 70°C LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: SOT; Pins: 8; Temperature Range: 0°C to 70°C LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to conform to conform to conform to conform to conform to conform to conform to
Parts packaging code SOT SOT SOT DFN DFN DFN SOT DFN
package instruction VSSOP, TSSOP8,.1 VSSOP, TSSOP8,.1 VSSOP, TSSOP8,.1 VQCCN, SOLCC8,.08,20 VQCCN, SOLCC8,.08,20 VQCCN, SOLCC8,.08,20 VSSOP, TSSOP8,.1 VQCCN, SOLCC8,.08,20
Contacts 8 8 8 8 8 8 8 8
Manufacturer packaging code TS8 TS8 TS8 DDB DDB DDB TS8 DDB
Reach Compliance Code compliant compliant compliant compliant compliant compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Adjustable threshold YES YES YES YES 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 POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PQCC-N8 R-PQCC-N8 R-PQCC-N8 R-PDSO-G8 R-PQCC-N8
JESD-609 code e3 e3 e3 e3 e3 e3 e3 e3
length 2.9 mm 2.9 mm 2.9 mm 3 mm 3 mm 3 mm 2.9 mm 3 mm
Humidity sensitivity level 1 1 1 1 1 1 1 1
Number of channels 2 2 2 2 2 2 2 2
Number of functions 1 1 1 1 1 1 1 1
Number of terminals 8 8 8 8 8 8 8 8
Maximum operating temperature 85 °C 85 °C 70 °C 70 °C 85 °C 70 °C 70 °C 85 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code VSSOP VSSOP VSSOP VQCCN VQCCN VQCCN VSSOP VQCCN
Encapsulate equivalent code TSSOP8,.1 TSSOP8,.1 TSSOP8,.1 SOLCC8,.08,20 SOLCC8,.08,20 SOLCC8,.08,20 TSSOP8,.1 SOLCC8,.08,20
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH CHIP CARRIER, VERY THIN PROFILE CHIP CARRIER, VERY THIN PROFILE CHIP CARRIER, VERY THIN PROFILE SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH CHIP CARRIER, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 260 260 260 260 260 260 260
power supply 1,2.5 V 1,2.5 V 1,2.5 V 1,2.5 V 1,2.5 V 1,2.5 V 1,2.5 V 1,2.5 V
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1 mm 1 mm 1 mm 0.8 mm 0.8 mm 0.8 mm 1 mm 0.8 mm
Minimum supply voltage (Vsup) 1 V 1 V 1 V 1 V 1 V 1 V 1 V 1 V
Nominal supply voltage (Vsup) 1 V 1 V 1 V 1 V 1 V 1 V 1 V 1 V
surface mount YES YES YES YES YES YES YES YES
technology CMOS CMOS CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level INDUSTRIAL INDUSTRIAL COMMERCIAL COMMERCIAL INDUSTRIAL COMMERCIAL COMMERCIAL INDUSTRIAL
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING NO LEAD NO LEAD NO LEAD GULL WING NO LEAD
Terminal pitch 0.65 mm 0.65 mm 0.65 mm 0.5 mm 0.5 mm 0.5 mm 0.65 mm 0.5 mm
Terminal location DUAL DUAL DUAL QUAD QUAD QUAD DUAL QUAD
Maximum time at peak reflow temperature 30 30 30 30 30 30 30 30
width 1.625 mm 1.625 mm 1.625 mm 2 mm 2 mm 2 mm 1.625 mm 2 mm
Maker - Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
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