LTC1261LCMS8-4 datasheet, PDF - EEWORLD Datasheet

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LTC1261LCMS8-4: DescriptionSwitched Capacitor Regulated Voltage Inverter; CategoryPower/power management The power supply circuit; File Size186KB，12 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1261LCMS8-4 Overview

Switched Capacitor Regulated Voltage Inverter

LTC1261LCMS8-4 Parametric

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

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LTC1261L

Switched Capacitor

Regulated Voltage Inverter

FEATURES

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

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

1µF

0.1µF

SHDN

10k

POWER VALID

OUT

= –4V

AT 10mA

OUT

– 4V

SHDN

POWER VALID

1261L TA01

REG

LTC1261L-4

OUT

–

C3*

100pF

*OPTIONAL

GND

COMP

3.3µF

0.1ms/DIV

1261L TAO2

LTC1261LCMS8-4 Related Products

	LTC1261LCMS8-4	LTC1261LCS8-4.5	LTC1261LCS8-4	LTC1261LCS8	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	MSOP	SOIC	SOIC	SOIC	MSOP	-	MSOP
package instruction	TSSOP, TSSOP8,.19	0.150 INCH, PLASTIC, SO-8	SOP, SOP8,.25	SOP, SOP8,.25	PLASTIC, MSOP-8	-	TSSOP, TSSOP8,.19
Contacts	8	8	8	8	8	-	8
Manufacturer packaging code	MS8	S8	S8	S8	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	4.35 V	4.75 V	4.35 V	2.7 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	S-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	S-PDSO-G8	-	S-PDSO-G8
JESD-609 code	e0	e0	e0	e0	e0	-	e0
length	3 mm	4.9 mm	4.9 mm	4.9 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 V	-4.5 V	-4 V	-4.5 V	-4.5 V	-	-4.5 V
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY
encapsulated code	TSSOP	SOP	SOP	SOP	TSSOP	-	TSSOP
Encapsulate equivalent code	TSSOP8,.19	SOP8,.25	SOP8,.25	SOP8,.25	TSSOP8,.19	-	TSSOP8,.19
Package shape	SQUARE	RECTANGULAR	RECTANGULAR	RECTANGULAR	SQUARE	-	SQUARE
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	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	1.1 mm	1.75 mm	1.75 mm	1.75 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	0.65 mm	1.27 mm	1.27 mm	1.27 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 mm	3.9 mm	3.9 mm	3.9 mm	3 mm	-	3 mm
Base Number Matches	1	1	1	1	1	-	1

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