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LTC1261LCS8

Description
Switched Capacitor Regulated Voltage Inverter
CategoryPower/power management    The power supply circuit   
File Size186KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1261LCS8 Overview

Switched Capacitor Regulated Voltage Inverter

LTC1261LCS8 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Manufacturer packaging codeS8
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHED CAPACITOR REGULATOR
Maximum input voltage5.25 V
Minimum input voltage2.7 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current0.02 A
Nominal output voltage-4.5 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationDOUBLER INVERTER
Maximum switching frequency650 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9 mm
Base Number Matches1
LTC1261L
Switched Capacitor
Regulated Voltage Inverter
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Regulated Negative Voltage from a
Single Positive Supply
REG Pin Indicates Output is in Regulation
Adjustable or Fixed Output Voltages
Output Regulation:
±3.5%
Supply Current: 650µA Typ
Shutdown Mode Drops Supply Current to 5µA
Up to 20mA Output Current
Requires Only Three or Four External Capacitors
Available in MS8 and SO-8 Packages
The LTC
®
1261L is a switched-capacitor voltage inverter
designed to provide a regulated negative voltage from a
single positive supply. The LTC1261L operates from a
single 2.7V to 5.25V supply and provides an adjustable
output voltage from –1.23V to – 5V. The LTC1261L-4/
LTC1261L-4.5 needs a single 4.5V to 5.25V supply and
provides a fixed output voltage of – 4V to – 4.5V respec-
tively. Three external capacitors are required: a 0.1µF
flying capacitor and an input and output bypass capaci-
tors. An optional compensation capacitor at ADJ (COMP)
can be used to reduce the output voltage ripple.
Each version of the LTC1261L will supply up to 20mA
output current with guaranteed output regulation of
±3.5%.
The LTC1261L includes an open-drain REG output that
pulls low when the output is within 5% of the set value.
Quiescent current is typically 650µA when operating and
5µA in shutdown.
The LTC1261L is available in 8-pin MSOP and SO pack-
ages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
GaAs FET Bias Generators
Negative Supply Generators
Battery-Powered Systems
Single Supply Applications
TYPICAL APPLICATION
Waveforms for – 4V Generator with Power Valid
– 4V Generator with Power Valid
0V
5V
5V
C1
1µF
C2
0.1µF
1
2
V
CC
SHDN
8
10k
POWER VALID
V
OUT
= –4V
AT 10mA
OUT
– 4V
5V
SHDN
0V
5V
POWER VALID
0V
1261L TA01
7
REG
C1
+
LTC1261L-4
3
6
OUT
C1
4
C3*
100pF
*OPTIONAL
+
GND
COMP
5
C4
3.3µF
U
0.1ms/DIV
1261L TAO2
U
U
1

LTC1261LCS8 Related Products

LTC1261LCS8 LTC1261LCS8-4.5 LTC1261LCS8-4 LTC1261LCMS8-4 LTC1261LCMS8-4.5 LTC1261L LTC1261LCMS8
Description Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter Switched Capacitor Regulated Voltage Inverter
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology - Linear Technology
Is it Rohs certified? incompatible incompatible incompatible incompatible incompatible - incompatible
Parts packaging code SOIC SOIC SOIC MSOP MSOP - MSOP
package instruction SOP, SOP8,.25 0.150 INCH, PLASTIC, SO-8 SOP, SOP8,.25 TSSOP, TSSOP8,.19 PLASTIC, MSOP-8 - TSSOP, TSSOP8,.19
Contacts 8 8 8 8 8 - 8
Manufacturer packaging code S8 S8 S8 MS8 MS8 - MS8
Reach Compliance Code _compli _compli _compli _compli _compli - _compli
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 - EAR99
Analog Integrated Circuits - Other Types SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR - SWITCHED CAPACITOR REGULATOR
Maximum input voltage 5.25 V 5.25 V 5.25 V 5.25 V 5.25 V - 5.25 V
Minimum input voltage 2.7 V 4.75 V 4.35 V 4.35 V 4.75 V - 2.7 V
Nominal input voltage 5 V 5 V 5 V 5 V 5 V - 5 V
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 S-PDSO-G8 S-PDSO-G8 - S-PDSO-G8
JESD-609 code e0 e0 e0 e0 e0 - e0
length 4.9 mm 4.9 mm 4.9 mm 3 mm 3 mm - 3 mm
Humidity sensitivity level 1 1 1 1 1 - 1
Number of functions 1 1 1 1 1 - 1
Number of terminals 8 8 8 8 8 - 8
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C - 70 °C
Maximum output current 0.02 A 0.02 A 0.02 A 0.02 A 0.02 A - 0.02 A
Nominal output voltage -4.5 V -4.5 V -4 V -4 V -4.5 V - -4.5 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY
encapsulated code SOP SOP SOP TSSOP TSSOP - TSSOP
Encapsulate equivalent code SOP8,.25 SOP8,.25 SOP8,.25 TSSOP8,.19 TSSOP8,.19 - TSSOP8,.19
Package shape RECTANGULAR RECTANGULAR RECTANGULAR SQUARE SQUARE - SQUARE
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH - SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 235 235 235 235 - 235
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified - Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.1 mm 1.1 mm - 1.1 mm
surface mount YES YES YES YES YES - YES
Switch configuration DOUBLER INVERTER DOUBLER INVERTER DOUBLER INVERTER DOUBLER INVERTER DOUBLER INVERTER - DOUBLER INVERTER
Maximum switching frequency 650 kHz 650 kHz 650 kHz 650 kHz 650 kHz - 650 kHz
technology CMOS CMOS CMOS CMOS CMOS - CMOS
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL - COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) - Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING - GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm 0.65 mm 0.65 mm - 0.65 mm
Terminal location DUAL DUAL DUAL DUAL DUAL - DUAL
Maximum time at peak reflow temperature 20 20 20 20 20 - 20
width 3.9 mm 3.9 mm 3.9 mm 3 mm 3 mm - 3 mm
Base Number Matches 1 1 1 1 1 - 1
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